{"title":"Huum","description":null,"products":[{"product_id":"huum-cliff-9-cliff-series-9kw-sauna-heater","title":"HUUM CLIFF 9 CLIFF Series 9kW Sauna Heater","description":"\u003c!-- HUUM CLIFF 9 - 9kW Electric Sauna Heater --\u003e\u003c!-- CLIFF Series | 240V\/1PH | 283-460 cu ft --\u003e\u003c!-- No dimension image needed - heater product description only --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a2a3a; max-width: 900px; margin: 0 auto; line-height: 1.6; }\n  .sl * { box-sizing: border-box; }\n  .sl h4 { font-weight: 700 !important; color: #0f172a !important; margin: 1.5rem 0 0.5rem; line-height: 1.3; }\n  .sl h5 { font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; line-height: 1.3; }\n  .sl-hook { font-weight: 500 !important; line-height: 1.75 !important; color: #0f172a !important; padding: 1.1rem 1.4rem; background: #e8f0fa; border-left: 3px solid #2563a8; border-radius: 0 6px 6px 0; margin: 1.5rem 0; }\n  .sl-badges { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 1.75rem; }\n  .sl-badge { background: #e8f0fa; color: #2563a8; font-size: 12px; font-weight: 600; padding: 5px 11px; border-radius: 4px; border: 1px solid #bfd4ef; white-space: nowrap; }\n  .sl-desc p { font-weight: 500 !important; line-height: 1.75 !important; color: #0f172a !important; margin: 0 0 1rem; }\n  .sl-desc p:last-child { margin: 0; }\n  .sl-spec-table { width: 100%; border-collapse: collapse; font-size: 15px; }\n  .sl-spec-table tr:nth-child(odd) { background: #f8fafc; }\n  .sl-spec-table td { padding: 9px 12px; border: 1px solid #e2e8f0; vertical-align: top; }\n  .sl-spec-table td:first-child { color: #64748b; width: 52%; }\n  .sl-spec-table td:last-child { font-weight: 700 !important; color: #0f172a !important; }\n  .sl-spec-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; align-items: start; }\n  .sl-spec-tables { min-width: 0; }\n  .sl-spec-image { min-width: 0; 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line-height: 1.3; }\n  .sl-feat-title::before { content: \"\"; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; flex-shrink: 0; }\n  .sl-feat p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.6 !important; margin: 0; font-size: 14px; }\n  .sl-brand1, .sl-brand2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; padding: 1.5rem 0; }\n  .sl-brand-img { width: 100%; height: auto; border-radius: 8px; display: block; }\n  .sl-brand-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: #2563a8; background: #e8f0fa; border: 1px solid #bfd4ef; border-radius: 4px; padding: 4px 10px; margin-bottom: 0.75rem; }\n  .sl-brand1 h4, .sl-brand2 h4 { font-size: 22px !important; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.75rem; line-height: 1.3 !important; }\n  .sl-brand1 p, .sl-brand2 p { font-weight: 500 !important; 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margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0 0 1rem; }\n  .sl-manual h6 { font-size: 13px; font-weight: 700 !important; color: #64748b !important; margin: 1.25rem 0 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }\n  .sl-manual h6:first-child { margin-top: 0; }\n  .sl-doc-links { display: flex; flex-wrap: wrap; gap: 10px; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"layout-stack\"\u003e\n\u003ch2 class=\"element-text element-text--heading-xl\"\u003eHUUM CLIFF 9 CLIFF Series 9kW Sauna Heater\u003c\/h2\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe HUUM CLIFF 9 is a 9kW floor-mounted electric sauna heater engineered for a specific problem: how do you put a high-capacity heater in a sauna where wall space is tight? The CLIFF's answer is geometry. Where most sauna heaters are wide, boxy units that demand significant clearance from the surrounding walls, the CLIFF is a slim vertical tower - 10.6 inches wide, 10.6 inches deep, and 38.4 inches tall - that requires only 9.45 inches of clearance from walls on the 9kW model. This makes it the logical choice for compact sauna cabins, corner installations, and any room where a conventional heater would compromise bench space or create awkward layout constraints. Despite its slim profile, the CLIFF 9 holds 165 lbs of sauna stones - a generous load that produces the soft, sustained steam that is the mark of a properly loaded sauna heater.\u003c\/p\u003e\n\u003ch4\u003eThe internal air duct system - 25% faster heating\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF's slim profile is made possible by an internal air duct system that serves a dual purpose: it is the structural reason the safety distances are reduced, and it is also the mechanism that makes the heater up to 25% faster at reaching temperature than a conventional heater of equivalent power. The air duct draws cool air from the base of the heater, channels it up through the core, and releases it through the top and sides - creating continuous air circulation through the stone mass rather than relying on passive convection alone. This forced internal circulation means the stones heat more evenly from base to top, that the temperature equilibrium inside the heater is reached faster, and that the surrounding wall materials are actively cooled by the moving air rather than receiving static radiant heat. The result is a heater that is simultaneously faster, safer, and more space-efficient than standard electric sauna heaters.\u003c\/p\u003e\n\u003ch4\u003e165 lbs of stone capacity - soft, long-lasting steam\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 9 holds up to 165 lbs of sauna stones. This is a substantial stone load - significantly more than many compact heaters of comparable footprint - and it is the primary reason the CLIFF produces the soft, gentle, long-lasting steam that sauna enthusiasts associate with wood-fired heating. Large stone mass stores more thermal energy, releases it more slowly, and absorbs more water per ladle without producing the sharp steam burst that an under-stoned heater creates. HUUM designs the CLIFF so that the stones are in direct contact with the heating elements - rather than surrounding a separate heated core - maximising the proportion of heat that transfers directly to the stones rather than radiating from metal surfaces. Five boxes of HUUM CLIFF-compatible stones (33 lbs each, 165 lbs total) are required for proper operation and to maintain warranty coverage; they are sold separately. HUUM recommends rounded olivine-diabase stones in 5-10cm size for the best steam quality and durability.\u003c\/p\u003e\n\u003ch4\u003eRed Dot Award design, SGS certified, 230°F maximum\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF received the internationally recognised Red Dot Product Design Award - a recognition of both its aesthetic quality and its engineering innovation. The natural stone surface surrounds the heater on all sides, making it visually resolved from every angle in the sauna room rather than presenting a visible metal housing. The CLIFF is SGS certified (rather than UL listed), which is relevant to the temperature it can reach: SGS standards allow the heater to achieve up to 230°F, compared to the 194°F ceiling imposed on UL-listed heaters. In practice this means the CLIFF can bring a properly sized sauna room to the high temperatures associated with Finnish sauna tradition - temperatures that UL-listed heaters physically cannot reach. The CLIFF operates on a 240V\/1-phase circuit, requires a 50A breaker, and uses 8 AWG wire. A HUUM UKU control unit is required for operation and is sold separately in Local, Wi-Fi, or Glass Wi-Fi configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e9kW slim floor-mounted electric sauna heater for rooms from 283 to 460 cubic feet. 10.6\"W x 10.6\"D x 38.4\"H. 35.2 lbs heater weight. 165 lbs stone capacity (5 boxes, sold separately). Internal air duct system - heats up to 25% faster than conventional heaters. Wall safety distance 9.45\" (24 cm). Stones in direct contact with heating elements. Removable ribs and prop blocks for precise stone stacking. Premium stainless steel construction with industrial-grade heating elements. SGS certified - maximum 230°F. Red Dot Award winner. 240V \/ 1-phase, 37.5A, 50A breaker, 8 AWG wire. UKU control sold separately (Local, Wi-Fi, or Glass). Stones sold separately. Optional safety railing and reflector panel available. 5-year warranty. Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e283 to 460 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e165 lbs stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHeats 25% faster - internal air duct\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e9.45\" wall safety distance\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlim tower - 10.6\"W x 10.6\"D x 38.4\"H\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-mounted - freestanding\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStones touch heating elements directly\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemovable ribs + prop blocks\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePremium stainless steel\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS certified - up to 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRed Dot Award winner\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e240V \/ 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control compatible\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePower and electrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003e50 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS (fully accepted in USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (vs 194°F for UL-listed heaters)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions and weight\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e10.6\" (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e10.6\" (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4\" (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e35.2 lbs (16 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShipping weight (with stones)\u003c\/td\u003e\n\u003ctd\u003e200 lbs (91 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting type\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, freestanding\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePerformance and room sizing\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum room volume\u003c\/td\u003e\n\u003ctd\u003e283 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum room volume\u003c\/td\u003e\n\u003ctd\u003e460 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating speed advantage\u003c\/td\u003e\n\u003ctd\u003eUp to 25% faster - internal air duct system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall safety distance\u003c\/td\u003e\n\u003ctd\u003e9.45\" (24 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam type\u003c\/td\u003e\n\u003ctd\u003eSoft, long-lasting - wet or dry use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and design\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003ePremium stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating elements\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eDirect - stones in contact with heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct system\u003c\/td\u003e\n\u003ctd\u003eInternal - circulates air through stone mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone stacking\u003c\/td\u003e\n\u003ctd\u003eRemovable ribs + prop blocks for stable stacking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior surface\u003c\/td\u003e\n\u003ctd\u003eNatural stone surface all around\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Product Design Award\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl compatibility\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible controls\u003c\/td\u003e\n\u003ctd\u003eHUUM UKU Local, UKU Wi-Fi, UKU Glass Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl sold separately\u003c\/td\u003e\n\u003ctd\u003eYes - must be purchased separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local features\u003c\/td\u003e\n\u003ctd\u003eWall panel, remote control, light\/ventilation\/steamer integration, door sensor, overheating protection, child lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Wi-Fi features\u003c\/td\u003e\n\u003ctd\u003eAll Local features + HUUM app control from smartphone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Glass Wi-Fi\u003c\/td\u003e\n\u003ctd\u003eElegant glass panel with integrated Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOptional accessories\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eLight wood profiles - prevents accidental contact, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eStainless steel - mounts on side, reduces wall safety distance by half, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired for CLIFF 10.5kW only - not needed for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRecommended stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone type\u003c\/td\u003e\n\u003ctd\u003eRounded olivine-diabase - 5 to 10 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity required\u003c\/td\u003e\n\u003ctd\u003e5 boxes (33 lbs each = 165 lbs total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWhy rounded\u003c\/td\u003e\n\u003ctd\u003eComplement CLIFF design, produce milder steam, high heat capacity, durable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones to avoid\u003c\/td\u003e\n\u003ctd\u003eDecorative stones (can break easily at sauna temperatures)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CLIFF 9kW electric sauna heater\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable floor legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRemovable ribs for stone stacking\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eProp blocks for stone stacking stability\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and wiring diagram manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e Sauna stones (5 boxes required, sold separately), UKU control unit (required, sold separately), safety railing (optional, sold separately), reflector panel (optional, sold separately).\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the CLIFF 9 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSlim tower - 9.45\" wall clearance\u003c\/div\u003e\n\u003cp\u003eAt 10.6\" wide with only 9.45\" required wall clearance, the CLIFF fits in corners, small rooms, and beside benches where conventional heaters cannot go. The internal air duct system achieves this without compromising performance - it actively cools the surrounding structure while heating the stone mass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e25% faster heating - internal air duct\u003c\/div\u003e\n\u003cp\u003eThe air duct draws cool air from the base, channels it through the heated stone core, and releases it from the top. This forced internal circulation heats the stones more evenly, reaches equilibrium temperature faster, and produces consistent heat distribution throughout the sauna room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e165 lbs of stone capacity\u003c\/div\u003e\n\u003cp\u003eA substantial stone load that stores significant thermal energy and releases it gradually. Stones sit in direct contact with the heating elements for maximum heat transfer efficiency. The result is the soft, long-lasting steam associated with traditional wood-fired saunas - not the sharp steam burst of under-stoned electric heaters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSGS certified - up to 230°F\u003c\/div\u003e\n\u003cp\u003eSGS certification (fully accepted in the USA) allows the CLIFF to reach 230°F - 36 degrees higher than the 194°F ceiling imposed on UL-listed heaters. This matters: traditional Finnish sauna is experienced at 176°F to 212°F at bench level. The CLIFF makes that experience genuinely achievable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRed Dot Award design\u003c\/div\u003e\n\u003cp\u003eThe natural stone surface surrounds the heater on all four sides, making it visually resolved from every angle inside the sauna room. No exposed metal housing, no visible back panel. The CLIFF is designed to be looked at from all sides - not positioned against a wall to hide it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU control ecosystem\u003c\/div\u003e\n\u003cp\u003eChoose Local (wall panel + remote control), Wi-Fi (smartphone app + remote preheat), or Glass Wi-Fi (elegant glass panel with integrated Wi-Fi). All UKU units include door sensor, overheating protection, and child lock. Sold separately - can be selected to match your sauna setup and usage preferences.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"HUUM CLIFF 9kW electric sauna heater showing slim tower profile with natural stone surface\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0627\/7778\/6508\/files\/huum-cliff-main.jpg\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia\u003c\/span\u003e\n\u003ch4\u003eHUUM. Precision-crafted sauna heaters that reach temperatures others cannot.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer that has made genuine engineering innovation the foundation of its product range. The CLIFF is the expression of a specific engineering question: how much can wall clearance be reduced without compromising the performance or safety of an electric sauna heater? The internal air duct system is HUUM's answer - a structural innovation that actively manages heat distribution rather than relying on passive radiation, enabling the slim tower profile and reduced safety distances that make the CLIFF the most space-efficient high-capacity electric sauna heater available.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.45\" wall safety distance\u003c\/strong\u003e - the internal air duct actively cools surrounding walls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 25% faster heating\u003c\/strong\u003e - forced air circulation through the stone mass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e165 lbs stone capacity\u003c\/strong\u003e - direct stone-to-element contact, soft long-lasting steam\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS certified - 230°F maximum\u003c\/strong\u003e - true Finnish sauna temperatures achievable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-year warranty\u003c\/strong\u003e - fully serviceable, replacement parts available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eAbout HUUM\u003c\/span\u003e\n\u003ch4\u003ePrecision sauna heaters, handcrafted in Estonia for the global market\u003c\/h4\u003e\n\u003cp\u003eEvery HUUM heater is produced in Estonia - handcrafted components assembled with careful attention to detail and craftsmanship. HUUM uses high-quality stainless steel throughout, minimising the amount of metal exposed to sauna heat so that the majority of thermal energy derives from the stone mass rather than from metal surfaces. This is the same principle behind traditional wood-fired sauna heating - large stone mass, minimal metal - applied to electric heating technology. The small metal footprint also maximises the proportion of beneficial negative ions in the sauna air, consistent with the known health benefits of traditional Finnish sauna.\u003c\/p\u003e\n\u003cp\u003eThe CLIFF ships from Chicago on a wooden freight pallet. Typical lead time is 7 to 9 days from order. Curbside delivery - a tracking number is provided when the order ships. Installation requires a licensed electrician for the 240V\/1-phase circuit. HUUM recommends having the electrician review the wiring diagram included with the heater before installation. The CLIFF must be installed with the correct stone type and quantity (5 boxes of rounded olivine-diabase) to maintain warranty coverage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM CLIFF heater installed in sauna room showing slim profile next to bench\" src=\"https:\/\/thesaunaheater.com\/cdn\/shop\/files\/HUUM-Cliff-Electric-Sauna-Heater_550x.jpg?v=1704577763\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003ch5\u003eInstallation manual and wiring diagram\u003c\/h5\u003e\n\u003cp\u003eThe installation manual and wiring diagram are included with the HUUM CLIFF 9 heater and are also available for download below. The wiring diagram shows the 240V\/1-phase circuit requirements including breaker size (50A) and wire gauge (8 AWG). Review the manual before scheduling your electrician to ensure the circuit preparation is correct before the heater arrives. The manual also covers stone placement using the removable ribs and prop blocks, UKU control wiring, and safety distance requirements for the 9kW model (9.45\" from walls).\u003c\/p\u003e\n\u003ch6\u003eDownloads\u003c\/h6\u003e\n\u003cdiv class=\"sl-doc-links\"\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Installation Manual (PDF) \u003c\/a\u003e \u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM-Stone-Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year HUUM limited warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF 9kW electric sauna heater is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in materials and workmanship under normal residential use. To maintain warranty coverage, the heater must be installed with the correct stone type and quantity (5 boxes of CLIFF-compatible rounded olivine-diabase stones) and operated with a compatible HUUM UKU control unit. The warranty does not cover damage from improper installation, use with incorrect stones (including decorative stones), operation without the required stone load, or electrical damage from incorrect circuit configuration. The CLIFF is fully serviceable - replacement heating elements and components are available. Proof of purchase is required for warranty claims. We are an authorised HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52190645715226,"sku":"H1004022","price":2638.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-cliff-main.jpg?v=1778268153"},{"product_id":"huum-cliff-mini-4-cliff-mini-series-4kw-sauna-heater","title":"HUUM CLIFF Mini 4 CLIFF Mini Series 4kW Sauna Heater","description":"\u003ch2 class=\"MuiTypography-root MuiTypography-h1 comp-typography comp-product-details__name css-m5p6uo\"\u003eHUUM CLIFF Mini 4 CLIFF Mini Series 4kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- HUUM CLIFF Mini 4 - 4kW Wall-Mounted Electric Sauna Heater --\u003e\u003c!-- CLIFF Mini Series | 240V\/1PH | 106-177 cu ft --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a2a3a; 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border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-green { background: #f0fdf4; border: 1px solid #86efac; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0 0 1rem; }\n  .sl-manual h6 { font-size: 13px; font-weight: 700 !important; color: #64748b !important; margin: 1.25rem 0 0.5rem; text-transform: uppercase; letter-spacing: 0.05em; }\n  .sl-manual h6:first-child { margin-top: 0; }\n  .sl-doc-links { display: flex; flex-wrap: wrap; gap: 10px; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM CLIFF Mini 4 is the smallest and most installation-friendly heater in the CLIFF range - and it is the only CLIFF model that mounts on the wall rather than standing on the floor. At 10.6 inches wide and just 6.3 inches deep, it occupies less than a third of the wall footprint of a conventional electric sauna heater. Its wall safety clearance is 2.36 inches - the shortest in the entire HUUM lineup - enabling installation in small home saunas, apartment sauna rooms, cabin saunas, and any space where a floor-mounted heater would be impossible or awkward. Despite its compact profile, the CLIFF Mini 4 holds 132 lbs of sauna stones and delivers the same internal air duct heating technology as the full CLIFF range, reaching temperatures up to 230°F and heating 25% faster than conventional heaters. It runs on a standard 20A circuit with 12 AWG wire - the lightest electrical requirement of any HUUM heater.\u003c\/p\u003e\n\u003ch4\u003eWall-mounted - the only CLIFF model that does not need floor space\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF Mini's wall-mount design is not a downgrade from the floor CLIFF - it is a different solution to a different problem. Floor-mounted heaters require clear floor area around the heater, a specific heater position in the room layout, and structural consideration of the floor load point. The CLIFF Mini mounts to the wall and projects only 6.3 inches into the room, eliminating all three of those constraints simultaneously. The heater occupies wall space rather than floor space - which in a small sauna room is often the most abundant resource. It can be positioned at exactly the right height for the sauna layout, can be placed in corners that floor heaters cannot reach, and can be installed in rooms where the floor plan simply does not allow a freestanding unit. The 2.36-inch wall safety clearance means it can sit very close to adjacent walls and surfaces without any concern - closer than any other HUUM model.\u003c\/p\u003e\n\u003ch4\u003e132 lbs of stones in a 6.3-inch-deep wall heater\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF Mini carries 132 lbs of sauna stones - a substantial load for a wall-mounted heater, and one that most heaters of this size cannot approach. This is the result of HUUM's specific engineering philosophy: the ribs of the CLIFF Mini's stone cage are made from the cutout offcuts produced when manufacturing HUUM STEEL heaters - waste material from one heater's production becomes the structural framework of another. This manufacturing approach allows HUUM to create a stone cage with maximum internal volume for the external footprint, packing 132 lbs of stone into a heater that is only 6.3 inches deep. The stones are in direct contact with the heating elements throughout the cage, maximising heat transfer efficiency. Four boxes of 33-lb rounded olivine-diabase stones (1.2-2\" diameter) are required and sold separately. The removable ribs and included prop blocks allow the fin sections to be removed for stone loading, then reinstalled without any tools.\u003c\/p\u003e\n\u003ch4\u003eEco-conscious production - CLIFF ribs from STEEL cutouts\u003c\/h4\u003e\n\u003cp\u003eHUUM's production process for the CLIFF Mini is designed around zero material waste. When stainless steel sheets are stamped to produce the HUUM STEEL heater bodies, the cutout sections would normally become scrap. Instead, HUUM uses those exact cutouts as the rib sections of the CLIFF heater cage - the material removed from one product becomes the structural framework of another. The result is two heaters produced from the same stainless steel sheet with no offcut waste. This is not a marketing claim - it is an engineering design decision that is visible in the finished product: the profile of the CLIFF ribs and the negative profile of the STEEL heater body are geometric complements of each other. For buyers who care about material efficiency and responsible manufacturing, the CLIFF Mini is the environmentally considered choice in the HUUM range.\u003c\/p\u003e\n\u003ch4\u003eSimple electrical installation - 20A breaker, 12 AWG wire\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF Mini 4 operates on 240V\/1-phase with a 20A breaker and 12 AWG wire. This is the lightest electrical specification of any HUUM heater, and it is significantly more accessible than the 50A breaker and 8 AWG wire required for the CLIFF 9. In many homes with existing sauna rooms or small steam rooms, a 20A 240V circuit is already in place or can be added with a simple panel modification rather than requiring the heavier infrastructure of a larger heater installation. An electrician is still required for all connections - but the CLIFF Mini 4 places the smallest possible electrical demand on the installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e4kW wall-mounted electric sauna heater for rooms from 106 to 177 cubic feet. 10.6\"W x 6.3\"D x 38.4\"H. Wall safety clearance 2.36\" (6 cm) - shortest in the HUUM range. 132 lbs stone capacity (4 boxes, sold separately). Internal air duct system - heats 25% faster. Stones in direct contact with heating elements. Removable ribs and prop blocks for stone loading. Stone cage ribs made from recycled STEEL heater cutouts - zero material waste. Premium stainless steel construction. SGS certified - maximum 230°F. Red Dot Award design. 240V \/ 1-phase, 20A breaker, 12 AWG wire. UKU control sold separately (Local, Wi-Fi, or Glass). Stones sold separately. Optional safety railing and reflector panel available. 3-year limited residential warranty. Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e4 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e106 to 177 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWall-mounted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOnly wall-mounted CLIFF model\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2.36\" wall clearance - shortest in HUUM range\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e132 lbs stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e10.6\"W x 6.3\"D x 38.4\"H\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHeats 25% faster - internal air duct\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDirect stone-to-element contact\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRibs from recycled STEEL cutouts\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePremium stainless steel\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS certified - up to 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRed Dot Award winner\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e240V \/ 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e20A breaker - 12 AWG wire\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control compatible\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3-year residential warranty\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePower and electrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e4 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003e20 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e12 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS (fully accepted in USA)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions and weight\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e10.6\" (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e6.3\" (160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4\" (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting type\u003c\/td\u003e\n\u003ctd\u003eWall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF Mini vs floor CLIFF depth\u003c\/td\u003e\n\u003ctd\u003e6.3\" vs 10.6\" - 40% slimmer profile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePerformance and room sizing\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum room volume\u003c\/td\u003e\n\u003ctd\u003e106 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum room volume\u003c\/td\u003e\n\u003ctd\u003e177 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e132 lbs (4 boxes required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size required\u003c\/td\u003e\n\u003ctd\u003e1.2 to 2\" diameter (3-5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating speed advantage\u003c\/td\u003e\n\u003ctd\u003eUp to 25% faster - internal air duct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall safety clearance\u003c\/td\u003e\n\u003ctd\u003e2.36\" (6 cm) - shortest in HUUM lineup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam type\u003c\/td\u003e\n\u003ctd\u003eSoft, long-lasting - wet or dry\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and design\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003ePremium stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating elements\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eDirect - stones in contact with heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct system\u003c\/td\u003e\n\u003ctd\u003eInternal - circulates air through stone mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRib material\u003c\/td\u003e\n\u003ctd\u003eRecycled cutouts from HUUM STEEL heater production - zero waste\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone stacking\u003c\/td\u003e\n\u003ctd\u003eRemovable ribs + 2 prop blocks (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior surface\u003c\/td\u003e\n\u003ctd\u003eNatural stone surface visible all around\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Product Design Award\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl compatibility\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible controls\u003c\/td\u003e\n\u003ctd\u003eHUUM UKU Local, UKU Wi-Fi, UKU Glass Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl sold separately\u003c\/td\u003e\n\u003ctd\u003eYes - required for operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local features\u003c\/td\u003e\n\u003ctd\u003eWall panel, remote control, door sensor, overheating protection, child lock, light\/ventilation\/steamer integration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Wi-Fi features\u003c\/td\u003e\n\u003ctd\u003eAll Local features + HUUM app smartphone control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Glass Wi-Fi\u003c\/td\u003e\n\u003ctd\u003eElegant glass panel with integrated Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOptional accessories\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eLight wood profiles - prevents accidental contact, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eStainless steel - reduces wall safety clearance by half, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eStones required\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone type\u003c\/td\u003e\n\u003ctd\u003eRounded olivine-diabase - 1.2 to 2\" (3-5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity required\u003c\/td\u003e\n\u003ctd\u003e4 boxes x 33 lbs = 132 lbs total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote\u003c\/td\u003e\n\u003ctd\u003eSmaller stone size than floor CLIFF (3-5 cm vs 5-10 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CLIFF Mini 4kW wall-mounted heater\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eWall mounting bracket and hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e2 prop blocks (for removing fins during stone loading)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eNot included (required):\u003c\/strong\u003e UKU control unit (sold separately), 4 boxes of 1.2-2\" rounded olivine-diabase stones (132 lbs total, sold separately). \u003cstrong\u003eOptional:\u003c\/strong\u003e Safety railing, reflector panel (both sold separately).\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the CLIFF Mini 4 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eWall-mounted - floor stays clear\u003c\/div\u003e\n\u003cp\u003eThe only CLIFF that mounts to the wall. At 6.3\" deep and 2.36\" wall clearance, it fits into small sauna rooms, apartment saunas, and cabin spaces where a floor-mounted heater is impractical or impossible. No floor space consumed, no heavy footprint, no positioning constraints for benches or layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2.36\" wall clearance - shortest in HUUM\u003c\/div\u003e\n\u003cp\u003eThe internal air duct reduces the required wall safety clearance to just 2.36 inches - significantly less than any floor CLIFF model (9.45\" for the CLIFF 9). Fits next to adjacent walls, into corners, and alongside bench structures in any position that suits your sauna layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e132 lbs stones in a 6.3\" deep heater\u003c\/div\u003e\n\u003cp\u003eHigh stone capacity for a wall-mounted heater of this size, achieved through the zero-waste rib design. Stones sit in direct contact with the heating elements. Four boxes of 33-lb rounded olivine-diabase stones produce soft, sustained steam that continues long after the initial heat cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRecycled STEEL cutouts - zero waste production\u003c\/div\u003e\n\u003cp\u003eThe cage ribs of every CLIFF Mini are made from the exact cutout sections produced when stamping HUUM STEEL heater bodies. Two heaters manufactured from a single stainless steel sheet with no scrap offcuts. A genuine engineering design decision for material efficiency, visible in the finished product.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e20A breaker - lightest electrical spec\u003c\/div\u003e\n\u003cp\u003e240V\/1-phase on a standard 20A breaker with 12 AWG wire - the most accessible electrical installation of any HUUM heater. Suitable for rooms where a 20A 240V circuit already exists, or where adding one requires minimal panel modification. A licensed electrician is still required for all connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e25% faster heating + 230°F maximum\u003c\/div\u003e\n\u003cp\u003eThe internal air duct circulates air through the stone mass for faster, more even heating throughout the room volume. SGS certified to reach 230°F - the true Finnish sauna temperature that UL-listed heaters cannot achieve. A proper sauna experience in the smallest possible package.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"HUUM CLIFF Mini 4kW wall-mounted electric sauna heater showing slim profile and natural stone surface\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/hive-cliff-mini-sauna-heater-wall-in-Auroom.jpg?v=1778270661\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia\u003c\/span\u003e\n\u003ch4\u003eThe CLIFF Mini. Designed for saunas that don't have room for anything else.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer whose products are built on a specific engineering philosophy: the heater should disappear into the sauna rather than dominate it. The CLIFF Mini takes that principle further than any other HUUM model. Its wall-mount design, 6.3-inch depth, 2.36-inch wall clearance, and stone-forward cage construction make it the most space-efficient high-performance electric sauna heater available. The ribs of its stone cage are made from recycled material. The SGS certification allows it to reach temperatures that most competitors cannot. And despite all of these constraints, it holds 132 lbs of stones and heats 25% faster than a conventional heater.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall-mounted\u003c\/strong\u003e - the only CLIFF model that leaves the floor entirely free\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.36\" wall clearance\u003c\/strong\u003e - the shortest safety distance in the entire HUUM range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e132 lbs stone capacity\u003c\/strong\u003e - direct stone-to-element contact, soft long-lasting steam\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecycled rib construction\u003c\/strong\u003e - STEEL cutouts become CLIFF cage ribs, zero production waste\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e20A \/ 12 AWG\u003c\/strong\u003e - lightest electrical requirement of any HUUM heater\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eAbout HUUM\u003c\/span\u003e\n\u003ch4\u003ePrecision sauna heaters, handcrafted in Estonia\u003c\/h4\u003e\n\u003cp\u003eEvery HUUM heater is produced in Estonia - handcrafted components assembled with careful attention to detail and craftsmanship. HUUM uses high-quality stainless steel throughout, minimising the amount of metal exposed to sauna heat so that the majority of thermal energy derives from the stone mass rather than from metal surfaces. The CLIFF Mini is designed specifically for apartment saunas, small cabin rooms, and any residential space where a larger heater is not a practical option. It does not compromise on heat quality or steam performance to achieve its small footprint - it achieves them through better engineering.\u003c\/p\u003e\n\u003cp\u003eThe CLIFF Mini ships from Chicago on a freight pallet. Typical lead time is 7 to 9 days from order. Curbside delivery. A licensed electrician is required for the 240V\/1-phase circuit connection. Stones (4 boxes, 1.2-2\" rounded olivine-diabase) and a UKU control unit must be purchased separately and are required for operation before first use. Warranty coverage requires the correct stone type and quantity to be installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM CLIFF Mini heater installed on sauna wall showing slim profile beside bench\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-cliff-sauna-heater-installed.2_0_e93e3c22-a3e7-405e-b90f-981e0e14e7c1.jpg?v=1778270684\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003ch5\u003eInstallation manual and wiring diagram\u003c\/h5\u003e\n\u003cp\u003eThe CLIFF Mini installation manual is included with the heater and covers wall mounting, the 240V electrical connection (20A breaker, 12 AWG wire), stone loading using the removable ribs and prop blocks, UKU control wiring, minimum safety distances (2.36\" wall clearance), and guidance on stone type and quantity. Download below. Review the manual before scheduling your electrician to ensure the wall mounting location and electrical circuit are both prepared correctly before the heater arrives.\u003c\/p\u003e\n\u003ch6\u003eDownloads\u003c\/h6\u003e\n\u003cdiv class=\"sl-doc-links\"\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM Installation Manual (PDF) \u003c\/a\u003e \u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM-Element-Requirements (PDF) \u003c\/a\u003e \u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e3-year residential \/ 1-year commercial warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF Mini 4kW is covered by a \u003cstrong\u003e3-year limited residential warranty\u003c\/strong\u003e from the date of purchase, covering defects in materials and workmanship under normal residential use. Commercial use is covered by a \u003cstrong\u003e1-year limited warranty (excluding heating elements)\u003c\/strong\u003e. To maintain warranty coverage, the heater must be installed with the correct stone type and quantity (4 boxes of 1.2-2\" rounded olivine-diabase stones) and operated with a compatible HUUM UKU control unit. The warranty does not cover damage from improper installation, incorrect stones, operation without the required stone load, or incorrect electrical configuration. The CLIFF Mini is fully serviceable - replacement elements and components are available separately. Proof of purchase is required for warranty claims. We are an authorised HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52197812535578,"sku":"H1005012","price":2003.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-cliff-mini.jpg?v=1778270623"},{"product_id":"huum-hive-mini-6-hive-mini-series-6-0kw-sauna-heater","title":"HUUM HIVE Mini 6 HIVE Mini Series 6.0kW Sauna Heater","description":"\u003c!-- HUUM HIVE Mini 6 - 6kW Floor-Standing Electric Sauna Heater --\u003e\n\u003ch2 class=\"MuiTypography-root MuiTypography-subtitle1 comp-typography comp-product-details__subtitle css-1q568x9\"\u003eHIVE Mini Series 6.0kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- HIVE Mini Series | 240V\/1PH | 177-318 cu ft --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a2a3a; max-width: 900px; 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border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-green { background: #f0fdf4; border: 1px solid #86efac; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual p { font-weight: 500 !important; 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flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE Mini 6 is the smallest model in the HIVE Mini range - but it carries more sauna stones than most full-size heaters from other manufacturers. At 18.11 inches in diameter and 29.53 inches tall, it is a round, open-frame, floor-standing heater that holds 330 lbs of stones in an arching stainless steel cage inspired by the structure of a wild beehive. Where the CLIFF heaters are slim towers designed for corners and tight spaces, the HIVE Mini is a centerpiece - a heater you arrange the sauna room around rather than fit alongside everything else. The open stone cage is visible from every angle in the room, the stones surround every face of the heating elements with direct contact, and the round form creates even heat distribution outward in all directions simultaneously.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stones - the largest stone capacity in the HUUM Mini range\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini 6 holds 330 lbs (150 kg) of sauna stones when loaded without the air tunnel, and 265 lbs (120 kg) when the air tunnel is installed. This is the largest stone capacity of any heater in the HUUM mini range, and it is the primary reason the HIVE Mini produces the steam quality that sauna enthusiasts compare to traditional wood-fired heating. Large stone mass stores more thermal energy, releases heat more slowly and evenly, and absorbs more water per ladle without producing sharp steam bursts. Ten boxes of 2-4\" rounded olivine-diabase stones (33 lbs per box, 330 lbs total) are required for proper operation. Stones are sold separately. HUUM strongly recommends using rounded stones to complement the design and produce milder steam - and specifically olivine-diabase for its durability and high heat capacity.\u003c\/p\u003e\n\u003ch4\u003eRound form, open cage, beehive-inspired - a heater that is meant to be seen\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini takes its form from the structure of a wild beehive: a circular base, arching stainless steel ribs that curve inward and upward, and an open stone cage that is visible from every angle in the sauna. There is no enclosure, no back panel, no side that faces the wall. The stones surround the heating elements on all sides, and the heater produces heat outward in every direction simultaneously. In most sauna rooms, a CLIFF or STEEL heater is positioned against a wall or in a corner where part of it is hidden. The HIVE Mini is typically positioned in the centre of a wall or as a freestanding focal point - a piece of functional sculpture that becomes the defining visual element of the sauna interior. As of 2025, the air tunnel is included as a standard component with all new HIVE Mini models, boosting heating efficiency further.\u003c\/p\u003e\n\u003ch4\u003eBench embedding - an installation option unique to the HIVE range\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini 6 can be partially embedded into the sauna bench or sauna floor - an installation option not available on the CLIFF heaters. When embedded, at least 13.78 inches (350 mm) of the heater must protrude above the bench surface. The optional embedding flange covers the cut edges of the bench opening for a clean finished look. This embedded installation positions the heater stone mass at bench level, shortens the radiant heat path to bathers, and allows the heater to be placed directly within the bench structure without consuming any wall or floor space. It requires precise carpentry work and should be planned during the sauna room construction phase rather than added to an existing room.\u003c\/p\u003e\n\u003ch4\u003eElectrical: 240V\/1-phase, 30A breaker, 10 AWG - moderate installation requirements\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini 6 runs on 240V\/1-phase with a 30A breaker and 10 AWG wire - a moderate electrical specification that is heavier than the CLIFF Mini 4 (20A) but lighter than the CLIFF 9 (50A). Most existing residential panels can accommodate a 30A 240V circuit without major modification. A licensed electrician is required for all connections. The wall safety distance for the HIVE Mini 6 is 2.37 inches (60 mm) - comparable to the CLIFF Mini in compactness. The UKU control unit is required for operation and sold separately in Local, Wi-Fi, or Glass configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e6kW floor-standing round electric sauna heater for rooms from 177 to 318 cubic feet. 18.11\" diameter x 29.53\"H (460 x 750 mm). 35.3 lbs heater weight. 330 lbs stone capacity (10 boxes, sold separately) - 265 lbs with air tunnel. Air tunnel included as standard (from 2025). Stones in direct contact with heating elements on all sides. Wall safety distance 2.37\" (60 mm). Beehive-inspired open stainless steel stone cage - visible from all angles. Can be partially embedded into bench. 4 adjustable floor legs. SGS certified - maximum 230°F. 240V \/ 1-phase, 25A draw, 30A breaker, 10 AWG wire. UKU control sold separately (Local, Wi-Fi, or Glass). Stones sold separately (10 boxes x 33 lbs). Optional: safety railing, embedding flange. 5-year limited warranty. Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 318 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lbs stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e18.11\" diameter - round centerpiece\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBeehive-inspired open stone cage\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAir tunnel included (2025+)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing with 4 adjustable legs\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBench-embeddable\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2.37\" wall safety distance\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStones touch elements on all sides\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS certified - up to 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e240V \/ 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e30A breaker - 10 AWG wire\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control compatible\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003e30 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDimensions and weight\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.53\" (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e35.3 lbs (16 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - 4 adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft (5-9 m³)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg) - 10 boxes x 33 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity with air tunnel\u003c\/td\u003e\n\u003ctd\u003e265 lbs (120 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2-4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety distances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistance A (walls)\u003c\/td\u003e\n\u003ctd\u003e2.37\" (60 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDistance B\u003c\/td\u003e\n\u003ctd\u003e22.83\" (580 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eYes - min. 13.78\" (350 mm) must protrude\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eHigh-grade stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel\u003c\/td\u003e\n\u003ctd\u003eIncluded as standard (from 2025)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years limited (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl and accessories\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl required\u003c\/td\u003e\n\u003ctd\u003eHUUM UKU - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU options\u003c\/td\u003e\n\u003ctd\u003eLocal, Wi-Fi, Glass Wi-Fi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eOptional - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmbedding flange\u003c\/td\u003e\n\u003ctd\u003eOptional - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE Mini 6kW floor-standing heater\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e4 adjustable floor legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAir tunnel (included as standard from 2025)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eNot included (required):\u003c\/strong\u003e UKU control unit (sold separately), 10 boxes of 2-4\" rounded olivine-diabase stones (330 lbs total, sold separately). \u003cstrong\u003eOptional:\u003c\/strong\u003e Safety railing (strongly recommended), embedding flange (both sold separately).\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HIVE Mini 6 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs stones - largest Mini capacity\u003c\/div\u003e\n\u003cp\u003eThe highest stone capacity of any heater in the HUUM mini range. 330 lbs of stone mass stores substantial thermal energy, releases heat slowly and evenly, and produces the soft, sustained steam associated with traditional wood-fired sauna - not the sharp bursts of under-stoned electric heaters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRound beehive form - 360° heat distribution\u003c\/div\u003e\n\u003cp\u003eThe open arcing stone cage produces heat outward in every direction simultaneously. No back panel, no wall side, no hidden face. The HIVE Mini is a sauna centerpiece rather than a wall fixture - heat radiates to every bather regardless of position in the room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eBench-embeddable installation\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini can be partially embedded into the sauna bench or floor, with the optional embedding flange covering the cut edges. At least 13.78\" must protrude above bench level. This installation option places the stone mass at bench height and eliminates any floor or wall footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAir tunnel included standard\u003c\/div\u003e\n\u003cp\u003eFrom 2025, all HIVE Mini models include the air tunnel as a standard component. The air tunnel boosts heating efficiency and optimises airflow through the stone mass. When installed, stone capacity adjusts to 265 lbs (120 kg), still the largest in the mini electric heater category.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSGS certified - up to 230°F\u003c\/div\u003e\n\u003cp\u003eSGS certification allows the HIVE Mini 6 to reach 230°F - 36 degrees above the ceiling of UL-listed heaters. Traditional Finnish sauna is experienced at 176°F to 212°F at bench level. The HIVE Mini 6 achieves those temperatures reliably in rooms up to 318 cubic feet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e5-year limited warranty\u003c\/div\u003e\n\u003cp\u003eBacked by HUUM's 5-year limited warranty covering materials and workmanship. Heating elements are consumable parts and excluded from warranty coverage - a standard industry practice. The heater is fully serviceable with replacement parts available from HUUM.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM HIVE Mini 6kW floor-standing sauna heater showing round open stone cage and stainless steel arcs\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-mini-sauna-heater-with-air-tunnel.jpg?v=1778272372\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia\u003c\/span\u003e\n\u003ch4\u003eThe HIVE Mini. Named after a beehive. Built like one.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer that has made genuine engineering innovation the foundation of its product range. The HIVE Mini represents a different philosophy from the CLIFF and STEEL range: rather than minimising footprint, it maximises stone capacity - creating a heater that produces the thermal mass and steam quality of a much larger unit in a round form that becomes the focal point of any sauna room. The arcing stainless steel ribs that hold the stone cage are not just structural - they define the visual character of the heater from every angle and give it a quality of presence in the sauna interior that utilitarian heaters lack.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e330 lbs stone capacity\u003c\/strong\u003e - the largest in the HUUM mini electric range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound beehive form\u003c\/strong\u003e - 18.11\" diameter, open cage, heat 360° from all faces\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir tunnel included standard (2025+)\u003c\/strong\u003e - optimised airflow, faster heating\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBench-embeddable\u003c\/strong\u003e - with optional embedding flange, sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e - fully serviceable, replacement parts available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eAbout HUUM\u003c\/span\u003e\n\u003ch4\u003ePrecision sauna heaters, handcrafted in Estonia\u003c\/h4\u003e\n\u003cp\u003eEvery HUUM heater is produced in Estonia - handcrafted components assembled with careful attention to detail. HUUM uses high-quality stainless steel throughout, minimising the amount of metal exposed to sauna heat so that the majority of thermal energy derives from the stone mass. The HIVE Mini is the expression of that philosophy at its most generous: 330 lbs of stone, heated on all sides simultaneously, producing a quality of steam that large thermal mass enables and small heaters cannot replicate.\u003c\/p\u003e\n\u003cp\u003eThe HIVE Mini ships from Chicago on a freight pallet at significant weight with the stones included. Typical lead time is 7 to 9 days from order. Curbside delivery - carrier contacts you to schedule before arriving. A licensed electrician is required for the 240V\/1-phase circuit connection (30A breaker, 10 AWG wire). Stones (10 boxes of 2-4\" rounded olivine-diabase) and a UKU control unit must be purchased separately and are both required for first use. If bench embedding is planned, confirm bench construction dimensions against the embedding depth requirement (350 mm minimum protrusion) before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE Mini heater installed in sauna room showing round form as focal centerpiece with stones loaded\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-mini-sauna-heater-outdoor.jpg?v=1778272408\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003ch5\u003eOfficial HUUM HIVE User Manual and online installation guide\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE User Manual US is the only document published by HUUM for this heater. It is the current edition (v13) covering all HIVE Mini models (6, 9, 10.5kW). It covers room sizing tables, electrical specifications (breaker size and wire gauge per model), safety distances, floor and bench installation, air tunnel installation, stone loading, and UKU control wiring. The UKU control manual covers all UKU variants (Local, Wi-Fi, and Glass). Both are available directly from HUUM's official product page. The online installation guide at huumsauna.com walks through the HIVE Mini installation step by step and is the authoritative web reference. Review all three before scheduling your electrician and placing your stone order.\u003c\/p\u003e\n\u003ch6\u003eAvailable Documents\u003c\/h6\u003e\n\u003cdiv class=\"sl-doc-links\"\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and operation manual \u003c\/a\u003e \u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM-Element-Requirements.pdf \u003c\/a\u003e \u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e HUUM Certificate of Compliance.pdf \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year HUUM limited warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Mini 6kW electric sauna heater is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase, covering defects in materials and workmanship under normal residential use. Heating elements are consumable parts and are explicitly excluded from warranty coverage. To maintain warranty coverage, the heater must be installed with the correct stone type and quantity (10 boxes of 2-4\" rounded olivine-diabase stones, 330 lbs total) and operated with a compatible HUUM UKU control unit. The warranty does not cover damage from improper installation, use with incorrect stones, operation without the required stone load, insufficient stone fill (fire hazard - too sparse), or incorrect electrical configuration. The heater is fully serviceable - replacement elements and components are available. Proof of purchase is required for warranty claims. We are an authorised HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V \/ 1PH (Home Use)","offer_id":52191526977818,"sku":"H1002012","price":2502.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-mini-sauna-heater.jpg?v=1778272359"},{"product_id":"huum-core-alder-core-series-sauna-heater-alder-wood-exterior-up-to-10-5kw","title":"HUUM CORE Alder CORE Series Sauna Heater","description":"\u003c!-- HUUM CORE Alder - Up to 10.5kW Sauna Heater with Alder Wood Exterior - Standalone --\u003e\u003c!-- SKU: CORE6-ALD-SS | CORE Series | Alder wood exterior cladding | Control + stones sold separately --\u003e\u003c!-- Floor-standing | 240V\/1PH or 3PH | Open stone basket with natural wood panels --\u003e\u003c!-- SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 5 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Size Your Sauna --\u003e\u003c!-- NOTE: Unusual order - Warranty is section 2, before Element and Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CORE Alder CORE Series Sauna Heater, Alder Wood Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CORE Alder is a floor-standing electric sauna heater with an alder wood exterior cladding, available up to 10.5kW. This listing is the heater only. A compatible UKU control unit and sauna stones are sold separately. The CORE is HUUM's distinctive wood-clad heater series - a stainless steel open stone basket surrounded by natural wood panels that give the heater the warmth and texture of a timber sauna element rather than a metal appliance. The Alder variant uses alder wood for its exterior cladding - a lighter, fine-grained Nordic hardwood with a warm pale tone that integrates naturally with light-wood sauna interiors. The CORE Alder Package listing at BathingBrands bundles the heater with a UKU control and stones for a complete single purchase.\u003c\/p\u003e\n\u003ch4\u003eThe CORE design - stainless basket, natural wood exterior\u003c\/h4\u003e\n\u003cp\u003eThe HUUM CORE heater combines an open stainless steel stone basket with natural wood panels on the exterior sides. The stones are visible through the open basket structure and the wood cladding wraps the sides of the heater, presenting a warm natural wood face to the sauna room rather than the bare metal of a conventional electric heater. The result is a heater that reads as a wood-and-stone element - visually consistent with the natural timber and stone materials of a traditional sauna interior - while delivering the precision control and efficiency of a modern electric heater with UKU app connectivity. The open basket allows direct stone-to-element contact throughout the full stone load for even heat distribution, and water ladled onto the stones produces soft, consistent steam from stones at multiple temperature levels throughout the basket depth.\u003c\/p\u003e\n\u003ch4\u003eAlder wood cladding - the lightest CORE exterior\u003c\/h4\u003e\n\u003cp\u003eThe CORE series offers multiple wood species for the exterior cladding: Black (painted black finish), alder, thermo-aspen, and aspen. Alder is the lightest and most neutral-toned of the natural wood options - a pale, fine-grained wood with a warm creamy tone that suits sauna rooms with light Nordic timber, white or light grey tile, and pale stone interiors. Where thermo-aspen has the deep brown warmth of thermally modified wood and aspen has the lighter natural softwood tone, alder occupies the mid-warm neutral position - a natural wood look without the golden-yellow tones of some other species. For sauna rooms designed around a light, airy Nordic aesthetic where the heater should feel like a natural wood element without adding warmth to the colour palette, the CORE Alder is the appropriate finish choice in the CORE family.\u003c\/p\u003e\n\u003ch4\u003eUp to 10.5kW - output selected at purchase\u003c\/h4\u003e\n\u003cp\u003eThe CORE series is available in multiple output configurations up to 10.5kW. The specific output selected determines the room coverage and electrical specification. UKU control (Local Black or WiFi) and sauna stones are required for operation and sold separately at BathingBrands. The UKU Local Black provides on-site digital control of temperature, time, and safety functions. UKU WiFi adds HUUM app remote preheat, scheduling, and monitoring on iOS and Android. A compatible UKU Extension Box may be required depending on the output level selected - confirm with the control unit specifications. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eFloor-standing electric sauna heater with alder wood exterior cladding. Up to 10.5kW. Open stainless steel stone basket with natural alder wood side panels. Natural wood aesthetics - lighter neutral tone, warm pale alder grain. Control (UKU Local Black or WiFi) and sauna stones sold separately. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See CORE Alder Package listing for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eUp to 10.5 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAlder wood exterior cladding\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOpen stainless steel stone basket\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNatural wood aesthetics - lighter neutral tone\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStones sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCORE Alder Package available - bundled purchase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum output\u003c\/td\u003e\n\u003ctd\u003eUp to 10.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase or 3-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eStones and room sizing\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone specification\u003c\/td\u003e\n\u003ctd\u003eSee Stone Requirements document below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom coverage\u003c\/td\u003e\n\u003ctd\u003eDetermined by output level selected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior cladding\u003c\/td\u003e\n\u003ctd\u003eAlder wood panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTone\u003c\/td\u003e\n\u003ctd\u003ePale warm neutral - lighter than thermo-aspen or aspen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone basket\u003c\/td\u003e\n\u003ctd\u003eOpen stainless steel - stones visible on all sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eCORE wood exterior options\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Black\u003c\/td\u003e\n\u003ctd\u003ePainted black finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Alder (this listing)\u003c\/td\u003e\n\u003ctd\u003ePale warm neutral alder wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Thermo-Aspen\u003c\/td\u003e\n\u003ctd\u003eDeep brown thermally modified aspen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Aspen\u003c\/td\u003e\n\u003ctd\u003eLight natural aspen softwood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003ctd\u003eSame stainless basket, open design, up to 10.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eCORE6-ALD-SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Alder floor-standing sauna heater with alder wood exterior cladding\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e UKU control unit (Local Black or WiFi, sold separately at BathingBrands); sauna stones (sold separately - see Stone Requirements document). A UKU Extension Box may also be required depending on the output level - confirm with control specifications. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Alder stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAlder wood exterior - pale, warm, and neutral\u003c\/div\u003e\n\u003cp\u003eAlder wood brings a pale, fine-grained natural wood texture to the CORE exterior - warmer than raw metal but lighter than thermo-aspen or darker wood species. In sauna rooms with light Nordic timber, pale tile, or white and grey stone surfaces, alder's neutral warm tone integrates as a natural material element that complements the palette without introducing strong colour contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOpen stone basket - natural wood and stone visible\u003c\/div\u003e\n\u003cp\u003eThe CORE's open stainless steel basket allows the stones to be visible through the structure on all sides, with the alder wood panels framing the stone mass. The visual combination of natural wood exterior and visible stone interior gives the heater the character of a wood-and-stone sauna element rather than a metal appliance - consistent with the natural materials of a traditional Nordic sauna room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUp to 10.5kW - versatile output range\u003c\/div\u003e\n\u003cp\u003eThe CORE Alder is available up to 10.5kW, covering a wide range of sauna room sizes depending on the output configuration selected. The specific output determines the room coverage, electrical requirements, and whether a UKU Extension Box is needed. Confirm the output level and corresponding electrical specification before ordering - and check the Size Your Sauna document below for room sizing guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi compatible - HUUM app remote preheat\u003c\/div\u003e\n\u003cp\u003eThe CORE Alder is compatible with both UKU Local Black (on-site digital control) and UKU WiFi (HUUM app remote preheat, scheduling, and monitoring on iOS and Android). Both control variants are sold separately at BathingBrands. The UKU WiFi option is recommended for regular sauna users who want the convenience of starting the sauna remotely before arriving.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCORE Alder Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eFor a single purchase that includes the heater, UKU control, and stones, the CORE Alder Package listing at BathingBrands bundles all required components together. The standalone heater listing here is for buyers sourcing the heater separately - replacing a heater in an existing CORE installation, completing a multi-component order, or pairing with a specific control already on hand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSGS Listed - 5-year warranty - made in Estonia\u003c\/div\u003e\n\u003cp\u003eThe HUUM CORE Alder is SGS Listed for safety compliance and manufactured in Estonia by HUUM, whose heaters are used in sauna installations across North America and Europe. The 5-year limited warranty covers defects in manufacturing and materials under normal use conditions, with heating elements carrying their own separate warranty period.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM CORE Alder sauna heater with alder wood exterior cladding and open stainless steel stone basket\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-Core-Sauna-Heater-Alder-5.jpg?v=1778590587\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Alder. Up to 10.5kW. Alder wood exterior. Open stone basket. UKU compatible.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CORE Alder is HUUM's floor-standing heater with alder wood exterior cladding - an open stainless steel stone basket framed by natural alder wood panels for a warm, neutral Nordic aesthetic in the sauna room. This listing is the heater only. UKU control (Local Black or WiFi) and sauna stones are required and sold separately at BathingBrands. See the CORE Alder Package for a complete bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlder wood exterior cladding\u003c\/strong\u003e - pale warm neutral tone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen stainless steel stone basket\u003c\/strong\u003e - stones visible all sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 10.5kW\u003c\/strong\u003e - multiple output configurations available\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local Black or WiFi compatible\u003c\/strong\u003e - both sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStones sold separately\u003c\/strong\u003e - CORE Alder Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-CORE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna - HUUM Heater Calculator \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Alder is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Black \/ 6.5kW","offer_id":52279095132442,"sku":"CORE6-ALD-BK","price":2820.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 9kW","offer_id":52279095165210,"sku":"CORE9-ALD-BK","price":2940.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 10.5kW","offer_id":52279095197978,"sku":"CORE11-ALD-BK","price":3075.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 6.5kW","offer_id":52279095230746,"sku":"CORE6-ALD-SS","price":2820.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 9kW","offer_id":52279095263514,"sku":"CORE9-ALD-SS","price":2940.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 10.5kW","offer_id":52279095296282,"sku":"CORE11-ALD-SS","price":3075.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/HUUM-Core-Sauna-Heater-Alder-3.jpg?v=1778590599"},{"product_id":"huum-core-aspen-core-series-sauna-heater-aspen-wood-exterior-up-to-10-5kw","title":"HUUM CORE Aspen CORE Series Sauna Heater","description":"\u003c!-- HUUM CORE Aspen - Up to 10.5kW Sauna Heater with Aspen Wood Exterior - Standalone --\u003e\u003c!-- SKU: CORE6-ASP-BK | CORE Series | Aspen wood exterior cladding | Control + stones sold separately --\u003e\u003c!-- Floor-standing | 240V\/1PH or 3PH | Open stone basket with natural aspen wood panels --\u003e\u003c!-- SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 5 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CORE Aspen CORE Series Sauna Heater, Aspen Wood Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CORE Aspen is a floor-standing electric sauna heater with an aspen wood exterior cladding, available up to 10.5kW. This listing is the heater only. A compatible UKU control unit and sauna stones are sold separately. The CORE Aspen is the lightest-toned natural wood option in the CORE series - aspen is a Nordic softwood with a very pale, almost white grain that makes it the most visually light of the four CORE exterior finishes. For sauna rooms designed around the bright, minimalist aesthetic of traditional Nordic bathing culture - pale birch, whitewashed surfaces, or bright natural wood - the CORE Aspen delivers a heater exterior that reads as a natural, unobtrusive part of the room rather than a contrasting element. The CORE Aspen Package listing at BathingBrands bundles the heater with a UKU control and stones for a complete single purchase.\u003c\/p\u003e\n\u003ch4\u003eThe CORE design - open basket, wood and stone in one form\u003c\/h4\u003e\n\u003cp\u003eThe HUUM CORE heater combines an open stainless steel stone basket with natural wood panels on the exterior sides, creating a heater that presents both the warmth of natural wood and the honest texture of the sauna stones simultaneously from within a single unit. The open basket allows stones to be visible through the structure on all sides, and the wood exterior panels frame the stone mass in natural timber. Water ladled onto the stones produces soft, consistent steam from stones at multiple temperature levels throughout the basket depth, and the open structure allows heat and steam to radiate from the full stone surface area rather than only from an exposed top. The aspen wood panels of the CORE Aspen provide the lightest possible wood cladding tone - suitable for bright contemporary saunas where the traditional aesthetic is maintained but the material palette is kept pale and clean.\u003c\/p\u003e\n\u003ch4\u003eAspen wood - the palest CORE exterior\u003c\/h4\u003e\n\u003cp\u003eAmong the natural wood options in the CORE series, aspen has the lightest tone. Natural aspen is a soft, fine-grained Nordic wood with a pale cream-to-white surface that brightens with age rather than darkening. In a sauna room with light birch, spruce, or pale pine, aspen cladding on the heater is nearly invisible as a separate material - it reads as a continuation of the wall and bench timber rather than a distinct heater body. For sauna rooms where the interior palette is deliberately light and the heater should integrate as seamlessly as possible with the surrounding wood surfaces, the CORE Aspen is the correct choice. Where thermo-aspen is the thermally darkened version of the same wood species - deep brown and rich - natural aspen is the unmodified, lightest expression of the same timber.\u003c\/p\u003e\n\u003ch4\u003eUKU compatible - control sold separately\u003c\/h4\u003e\n\u003cp\u003eThe CORE Aspen is compatible with both UKU Local Black (on-site digital control) and UKU WiFi (HUUM app remote preheat, scheduling, and monitoring on iOS and Android). Both control variants are sold separately at BathingBrands. The specific output level selected for the CORE determines the room coverage, electrical requirements, and whether a UKU Extension Box is required. Confirm the output level and corresponding electrical and extension box specifications before ordering. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eFloor-standing electric sauna heater with aspen wood exterior cladding. Up to 10.5kW. Open stainless steel stone basket with natural aspen wood side panels. The lightest CORE exterior - pale cream-to-white Nordic aspen grain. Suits light birch, spruce, or pale pine sauna interiors where minimal contrast is the design goal. Control (UKU Local Black or WiFi) and sauna stones sold separately. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See CORE Aspen Package listing for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eUp to 10.5 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAspen wood exterior - palest CORE finish\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePale cream-to-white Nordic aspen grain\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOpen stainless steel stone basket\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStones sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCORE Aspen Package available - bundled purchase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum output\u003c\/td\u003e\n\u003ctd\u003eUp to 10.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase or 3-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eStones and room sizing\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone specification\u003c\/td\u003e\n\u003ctd\u003eSee Stone Requirements document below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom coverage\u003c\/td\u003e\n\u003ctd\u003eDetermined by output level selected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior cladding\u003c\/td\u003e\n\u003ctd\u003eNatural aspen wood panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTone\u003c\/td\u003e\n\u003ctd\u003ePale cream-to-white - lightest CORE exterior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone basket\u003c\/td\u003e\n\u003ctd\u003eOpen stainless steel - stones visible on all sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eCORE wood exterior options\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Black\u003c\/td\u003e\n\u003ctd\u003ePainted black finish - darkest\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Thermo-Aspen\u003c\/td\u003e\n\u003ctd\u003eDeep rich brown - thermally modified aspen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Alder\u003c\/td\u003e\n\u003ctd\u003ePale warm neutral - natural alder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Aspen (this listing)\u003c\/td\u003e\n\u003ctd\u003ePale cream-to-white - lightest, natural aspen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003ctd\u003eSame stainless basket, open design, up to 10.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eCORE6-ASP-BK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Aspen floor-standing sauna heater with natural aspen wood exterior cladding\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e UKU control unit (Local Black or WiFi, sold separately at BathingBrands); sauna stones (sold separately - see Stone Requirements document). A UKU Extension Box may also be required depending on the output level selected. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Aspen stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThe palest CORE exterior - natural aspen\u003c\/div\u003e\n\u003cp\u003eNatural aspen is the lightest-toned wood in the CORE series - a pale cream-to-white Nordic softwood that integrates with light birch, spruce, and pale pine sauna interiors without adding colour contrast. For sauna rooms built around a bright, minimal Nordic aesthetic where every material is kept light and the heater should read as part of the wood interior rather than a separate element, the CORE Aspen is the appropriate choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAspen vs Thermo-Aspen - same wood, opposite tones\u003c\/div\u003e\n\u003cp\u003eNatural aspen (this listing) and thermo-aspen are the same wood species at opposite ends of the colour spectrum. Natural aspen is pale cream-to-white - unmodified, light, and bright. Thermo-aspen is deep rich brown - the same aspen wood thermally modified at high temperature to produce a dramatic colour transformation. The shared species name can cause confusion; the tones could not be more different.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOpen basket - wood and stone visible together\u003c\/div\u003e\n\u003cp\u003eThe CORE's open stainless steel basket allows the full stone load to be visible through the structure on all sides, with the aspen wood panels framing the stone mass in pale natural timber. The visual combination of pale aspen exterior and visible stone interior creates a heater that presents the fundamental materials of a traditional sauna - wood and stone - as its visible face.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUp to 10.5kW output range\u003c\/div\u003e\n\u003cp\u003eThe CORE Aspen is available up to 10.5kW, covering a wide range of sauna room sizes. The output level selected determines room coverage, electrical specification, and extension box requirements. Confirm the correct output configuration for the specific sauna room before ordering and reference the Size Your Sauna document below for guidance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCORE Aspen Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe CORE Aspen Package listing at BathingBrands bundles the heater with a UKU control and stones for a single complete purchase. This standalone listing is for buyers sourcing the heater separately - replacing a heater in an existing CORE installation, pairing with a control already on hand, or completing a multi-component order in separate transactions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSGS Listed - 5-year warranty - made in Estonia\u003c\/div\u003e\n\u003cp\u003eThe HUUM CORE Aspen is SGS Listed for safety compliance and manufactured in Estonia by HUUM. The 5-year limited warranty covers defects in manufacturing and materials under normal use conditions, with heating elements carrying their own separate warranty period. Proof of purchase from an authorized HUUM dealer is required for warranty claims.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CORE Aspen sauna heater with natural aspen wood exterior cladding and open stainless steel stone basket - palest CORE finish\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/saunainter-huum-sauna-heaters-electric-sauna-heaters-huum-core-bk-105kw-thermo-aspen-without-control-unit-huum-core-bk-thermo-aspen_sxWLSg.jpg?v=1778604098\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Aspen. Up to 10.5kW. Natural aspen wood exterior. Palest CORE finish. Open stone basket.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CORE Aspen is HUUM's floor-standing heater with natural aspen wood exterior cladding - the lightest-toned exterior in the CORE series, with pale cream-to-white aspen panels framing an open stainless steel stone basket. This listing is the heater only. UKU control (Local Black or WiFi) and sauna stones are required and sold separately at BathingBrands. See the CORE Aspen Package for a complete bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural aspen wood exterior\u003c\/strong\u003e - pale cream-to-white, lightest CORE finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen stainless steel stone basket\u003c\/strong\u003e - stones visible all sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 10.5kW\u003c\/strong\u003e - multiple output configurations available\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local Black or WiFi compatible\u003c\/strong\u003e - both sold separately\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStones sold separately\u003c\/strong\u003e - CORE Aspen Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-CORE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna - HUUM Heater Calculator \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Aspen is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Black \/ 6.5kW","offer_id":52279119675674,"sku":"CORE6-ASP-BK","price":2820.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 9kW","offer_id":52279119708442,"sku":"CORE9-ASP-BK","price":2940.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 10.5kW","offer_id":52279119741210,"sku":"CORE11-ASP-BK","price":3075.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 6.5kW","offer_id":52279119773978,"sku":"CORE6-ASP-SS","price":2820.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 9kW","offer_id":52279119806746,"sku":"CORE9-ASP-SS","price":2940.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 10.5kW","offer_id":52279119839514,"sku":"CORE11-ASP-SS","price":3075.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/HUUM-Core-Sauna-Heater-Aspen-4.jpg?v=1778600568"},{"product_id":"huum-core-thermo-aspen-core-series-sauna-heater-thermo-aspen-wood-exterior-up-to-10-5kw","title":"HUUM CORE Thermo-Aspen CORE Series Sauna Heater, Up to 10.5kW","description":"\u003cp\u003e\u003c!-- HUUM CORE Thermo-Aspen - Up to 10.5kW Sauna Heater with Thermo-Aspen Wood Exterior - Standalone --\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM CORE Thermo-Aspen CORE Series Sauna Heater, Thermo-Aspen Wood Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003c!-- SKU: CORE11-TASP-SS | CORE Series | Thermo-aspen wood exterior | Control + stones sold separately --\u003e\u003c!-- Floor-standing | 240V\/1PH or 3PH | Open stone basket with thermally modified aspen panels --\u003e\u003c!-- SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 5 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand1 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM CORE Thermo-Aspen is a floor-standing electric sauna heater with a thermally modified aspen wood exterior cladding, available up to 10.5kW. This listing is the heater only. A compatible UKU control unit and sauna stones are sold separately. The CORE Thermo-Aspen is the darkest natural wood option in the CORE series - thermally modified aspen that has been treated at high temperature to produce a deep, rich brown finish that closely resembles the traditional appearance of well-seasoned sauna timber. For sauna rooms designed around the warm, enveloping aesthetic of a traditional Finnish or Nordic sauna - dark timber, amber lighting, aged wood - the CORE Thermo-Aspen delivers a heater exterior that integrates as a natural extension of the sauna's material palette. The CORE Thermo-Aspen Package listing at BathingBrands bundles the heater with a UKU control and stones for a complete single purchase.\u003c\/p\u003e\n\u003ch4\u003eThermal modification - what it means for the wood and the look\u003c\/h4\u003e\n\u003cp\u003eThermal modification is a process in which wood is treated at high temperatures (typically 180-230°C) in a controlled environment, altering the cell structure of the wood to produce a range of changes: a deep, uniform brown colour throughout the wood's cross-section (not a surface stain), improved dimensional stability under humidity changes, and increased resistance to decay and moisture absorption. The process converts some of the sugars and starches in the wood that would otherwise feed biological degradation, making the modified wood more stable in the high-heat, high-humidity environment of a sauna. Thermo-aspen specifically takes the naturally pale, white-grained aspen and transforms it to a deep chocolate or dark tobacco brown that bears little visual resemblance to the original natural aspen. In the sauna room context, thermo-aspen reads as the same rich dark timber tone associated with traditional Finnish sauna benches and wall cladding - a familiar and deeply atmospheric visual signature of the sauna space.\u003c\/p\u003e\n\u003ch4\u003eCORE Thermo-Aspen vs CORE Aspen - the same wood, transformed\u003c\/h4\u003e\n\u003cp\u003eBoth CORE Thermo-Aspen and CORE Aspen use aspen wood for the exterior cladding. Natural aspen (CORE Aspen) is pale cream-to-white - the lightest tone in the CORE range, suited to bright Nordic minimal interiors. Thermo-aspen (CORE Thermo-Aspen) is the same wood after thermal modification - deep rich brown, the darkest natural wood option in the CORE range. The shared species name creates the most likely source of buyer confusion in the CORE lineup. The tones could not be more different in practice: natural aspen is one of the palest commercial wood species; thermo-aspen is one of the richest dark browns achievable through a natural process. Confirm which variant is wanted by tone - pale and light (Aspen) or deep and warm (Thermo-Aspen) - before purchasing.\u003c\/p\u003e\n\u003ch4\u003eUKU compatible - control and stones sold separately\u003c\/h4\u003e\n\u003cp\u003eThe CORE Thermo-Aspen is compatible with both UKU Local Black (on-site digital control) and UKU WiFi (HUUM app remote preheat, scheduling, and monitoring on iOS and Android), both sold separately at BathingBrands. The specific output configuration selected determines room coverage, electrical requirements, and whether a UKU Extension Box is required. Confirm the output level and corresponding electrical specification before ordering. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eFloor-standing electric sauna heater with thermally modified aspen wood exterior cladding. Up to 10.5kW. Open stainless steel stone basket with deep rich brown thermo-aspen side panels. The darkest natural wood CORE exterior - thermo-aspen brings traditional Finnish sauna timber warmth to the heater form. Suits dark timber, amber-lit, and traditional Nordic sauna interiors. Control (UKU Local Black or WiFi) and sauna stones sold separately. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See CORE Thermo-Aspen Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eUp to 10.5 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eThermo-aspen exterior - deep rich brown\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eThermally modified aspen - darkest natural wood CORE\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eTraditional Finnish sauna timber aesthetic\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOpen stainless steel stone basket\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStones sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCORE Thermo-Aspen Package available\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum output\u003c\/td\u003e\n\u003ctd\u003eUp to 10.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase or 3-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eStones and room sizing\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone specification\u003c\/td\u003e\n\u003ctd\u003eSee Stone Requirements document below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom coverage\u003c\/td\u003e\n\u003ctd\u003eDetermined by output level selected\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior cladding\u003c\/td\u003e\n\u003ctd\u003eThermally modified aspen wood panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTone\u003c\/td\u003e\n\u003ctd\u003eDeep rich brown - darkest natural wood CORE exterior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone basket\u003c\/td\u003e\n\u003ctd\u003eOpen stainless steel - stones visible on all sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eCORE exterior options - tone scale\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Aspen\u003c\/td\u003e\n\u003ctd\u003ePale cream-to-white - lightest natural wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Alder\u003c\/td\u003e\n\u003ctd\u003ePale warm neutral - natural alder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Thermo-Aspen (this)\u003c\/td\u003e\n\u003ctd\u003eDeep rich brown - darkest natural wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCORE Black\u003c\/td\u003e\n\u003ctd\u003ePainted black - darkest overall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003ctd\u003eSame stainless basket, open design, up to 10.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eCORE11-TASP-SS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Thermo-Aspen floor-standing sauna heater with thermally modified aspen exterior\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable Legs (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUnfinished Metal Shields (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eCover Strips (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eWood Panels (4)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e UKU control unit (Local Black or WiFi, sold separately at BathingBrands); sauna stones (sold separately - see Stone Requirements document). A UKU Extension Box may also be required depending on the output level selected. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Thermo-Aspen stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThermo-aspen exterior - traditional sauna timber warmth\u003c\/div\u003e\n\u003cp\u003eThermally modified aspen has the deep, rich brown tone associated with traditional Finnish and Nordic sauna timber - aged, well-seasoned wood that darkens and warms over years of use in a hot sauna environment. For sauna rooms designed around this traditional aesthetic, the CORE Thermo-Aspen delivers that material character as a heater exterior finish, integrating the heater visually with the dark timber walls and benches of a classic sauna interior.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThermal modification - stable in sauna conditions\u003c\/div\u003e\n\u003cp\u003eThe thermal modification process improves aspen's dimensional stability and resistance to moisture-related movement - important properties for a heater exterior cladding exposed to repeated cycles of high heat and steam. Modified wood is less prone to expansion, contraction, and checking from repeated heating and cooling than unmodified wood, making thermo-aspen a practical as well as aesthetic choice for the sauna environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOpen basket - stone and wood visible together\u003c\/div\u003e\n\u003cp\u003eThe CORE's open stainless steel basket presents the stone mass through the structure on all sides, with the thermo-aspen panels framing the stones in deep brown timber. The visual pairing of dark wood and natural olivine stones is the most traditional of the CORE finish combinations - both materials referencing the visual language of a wood-heated Finnish sauna with a stone mass at its centre.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDarkest natural wood in the CORE range\u003c\/div\u003e\n\u003cp\u003eWithin the CORE series, Thermo-Aspen is the darkest natural wood option - darker in tone than Alder (pale warm neutral) and dramatically darker than natural Aspen (pale cream-white). For sauna rooms where the interior palette is dark and warm and the heater should match rather than contrast with surrounding surfaces, the Thermo-Aspen is the appropriate natural wood choice. CORE Black is the only darker option overall.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCORE Thermo-Aspen Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe CORE Thermo-Aspen Package listing at BathingBrands bundles the heater with a UKU control and stones for a single complete purchase. This standalone listing is for buyers sourcing the heater separately - replacing a heater in an existing CORE installation, pairing with a specific control already on hand, or completing a multi-component order in separate transactions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUp to 10.5kW - multiple output configurations\u003c\/div\u003e\n\u003cp\u003eThe CORE Thermo-Aspen is available up to 10.5kW across multiple output configurations. The specific output determines room coverage, electrical requirement, and whether the UKU Extension Box is needed. Use the Size Your Sauna document below to confirm the correct output for the specific room before ordering, and confirm panel capacity for the required breaker size with a licensed electrician.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM CORE Thermo-Aspen sauna heater with thermally modified aspen wood exterior deep brown cladding and open stainless steel stone basket\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-Core-Sauna-Heater-Thermo-Aspen-3.jpg?v=1778604590\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Thermo-Aspen. Up to 10.5kW. Deep rich brown thermo-aspen exterior. Traditional sauna timber aesthetic.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CORE Thermo-Aspen is HUUM's floor-standing heater with thermally modified aspen wood exterior cladding - the darkest natural wood option in the CORE range, with deep rich brown thermo-aspen panels framing an open stainless steel stone basket. This listing is the heater only. UKU control (Local Black or WiFi) and sauna stones are required and sold separately at BathingBrands. See the CORE Thermo-Aspen Package for a complete bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eThermally modified aspen exterior\u003c\/strong\u003e - deep rich brown, darkest natural wood CORE\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTraditional sauna timber aesthetic\u003c\/strong\u003e - integrates with dark Nordic sauna interiors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen stainless steel stone basket\u003c\/strong\u003e - stones visible all sides\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 10.5kW\u003c\/strong\u003e - UKU Local Black or WiFi compatible (sold separately)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStones sold separately\u003c\/strong\u003e - CORE Thermo-Aspen Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-CORE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna - HUUM Heater Calculator \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Thermo-Aspen is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Black \/ 6.5kW","offer_id":52279163715866,"sku":"CORE6-TASP-BK","price":2942.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 9kW","offer_id":52279163748634,"sku":"CORE9-TASP-BK","price":3062.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 10.5kW","offer_id":52279163781402,"sku":"CORE11-TASP-BK","price":3197.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 6.5kW","offer_id":52279163814170,"sku":"CORE6-TASP-SS","price":2942.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 9kW","offer_id":52279163846938,"sku":"CORE9-TASP-SS","price":3062.0,"currency_code":"USD","in_stock":true},{"title":"Stainless Steel \/ 10.5kW","offer_id":52279163879706,"sku":"CORE11-TASP-SS","price":3197.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/HUUM-Core-Sauna-Heater-Thermo-Aspen-6.jpg?v=1778604572"},{"product_id":"huum-core-black-pkg-core-series-sauna-heater-package-black-exterior-up-to-10-5kw","title":"HUUM CORE Black Pkg CORE Series Sauna Heater Package, Black Exterior, Up to 10.5kW","description":"\u003c!-- HUUM CORE Black Pkg - 6.5kW \/ 9kW \/ 10.5kW Sauna Heater Package, Black Exterior --\u003e\u003c!-- Floor-standing | 240V\/1PH | Up to 566 cu ft | Complete package - UKU Local Black + stones included --\u003e\n\u003ch2\u003eHUUM CORE Black Pkg CORE Series Sauna Heater Package, Black Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003c!-- SKU: 129482 | CORE Series | Made in Estonia --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM CORE Black Package is a complete, ready-to-install floor-standing sauna heater system available in three output levels - 6.5kW, 9kW, and 10.5kW - selected at checkout. Each package includes the CORE Black heater, UKU Local Black control, and sauna stones. The CORE Black is a new kind of heater from HUUM, the Estonian sauna company behind the acclaimed DROP and CLIFF models. Where most heaters are designed to fit somewhere in the sauna room, the CORE is designed to fit anywhere: a compact 32.7\"H x 15.2\"W x 15.2\"D square-footprint pillar with only 2 inches of safety clearance from combustible materials on all sides. It can be positioned against any wall, in any corner, or - uniquely - fully embedded lengthwise within the sauna bench so that the stone mass sits at bench level as part of the bench structure. All three power variants are physically identical. Only the output and room coverage change.\u003c\/p\u003e\n\u003ch4\u003eThree output levels in one listing - select at checkout\u003c\/h4\u003e\n\u003cp\u003eThe CORE Black Package is available in three configurations, all in the same physical heater body: 6.5kW (177-318 cu ft, 30A breaker, 10 AWG), 9kW (283-460 cu ft, 50A breaker, 8 AWG), and 10.5kW (354-566 cu ft, 50A breaker, 8 AWG). The 6.5kW version uses a lighter electrical installation than the 9kW and 10.5kW. The 9kW and 10.5kW share the same breaker and wire requirements. Since all three models are the same physical unit, HUUM recommends selecting the largest output that the electrical supply will accommodate - a larger heater heats the room faster, runs at lower duty cycle, and puts less thermal stress on the elements over time. The Sauna Heater size calculator at huumsauna.com confirms the appropriate output for any given room volume.\u003c\/p\u003e\n\u003ch4\u003e2-inch safety clearance - installs in tight spaces and inside the bench\u003c\/h4\u003e\n\u003cp\u003eThe CORE Black's most operationally significant specification is its 2-inch (50mm) safety clearance from combustible materials on all sides. This is the smallest safety envelope of any heater in this catalog - the Vega Compact's 0.4-inch clearance on flat combustible surfaces aside, no floor-standing heater comes close. The compact 15.2\" x 15.2\" square footprint combined with only 2 inches of clearance means the CORE can be placed in sauna room positions that larger heaters physically cannot occupy. The bench integration option is the most distinctive: the CORE can be embedded lengthwise into the sauna bench - a full-depth installation where the top of the stone mass is at bench level. This turns the heater from a floor element into part of the bench structure, freeing wall and floor space and creating an integrated sauna design that no conventional wall-mounted heater can replicate.\u003c\/p\u003e\n\u003ch4\u003e66 lbs of stones at the same footprint across all three output levels\u003c\/h4\u003e\n\u003cp\u003eAll three CORE Black variants hold 66 lbs (30 kg) of sauna stones (5-10 cm, 2-4\"). Two boxes of HUUM stones are required and included in this package. The stone capacity is the same whether the heater is 6.5kW or 10.5kW - what changes is how quickly those stones reach operating temperature and how large a room they can heat. The HUUM manual confirms that stones should be in direct contact with the heating elements throughout the cavity, producing the even heat-up and effective loyly steam of direct rock-to-element contact. Temperature range via the UKU control is 104°F to 230°F - the highest maximum temperature of any heater in this catalog, giving the CORE a significant upper range advantage over heaters limited to 175°F or 194°F.\u003c\/p\u003e\n\u003ch4\u003eUKU Local Black control included - and upgradeable\u003c\/h4\u003e\n\u003cp\u003eThe BathingBrands package includes a UKU Local Black control panel. The UKU Local is HUUM's standard touch control panel - it manages temperature, timer, and session settings from the panel directly. The UKU Local does not include WiFi; for remote preheat and HUUM app control, upgrading to the UKU WiFi control (sold separately) is required. The UKU system is modular: the same wiring and control connection is shared across the Local, WiFi, Glass, and Wood panel options, so upgrading from the included Local Black to a WiFi or Glass panel later is possible without rewiring. The UKU control supports heaters up to 9kW directly; for the 10.5kW CORE, an UKU Ext Box may be required - confirm with your HUUM dealer when ordering the 10.5kW configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete floor-standing sauna heater package in three output levels: 6.5kW (177-318 cu ft), 9kW (283-460 cu ft), 10.5kW (354-566 cu ft) - select at checkout. Includes CORE Black heater, UKU Local Black control, and sauna stones. All three variants physically identical: 32.7\"H x 15.2\"W x 15.2\"D, 42 lbs, 66 lb stone capacity. 2\" safety clearance all sides - installs in tight spaces and inside sauna bench. Matte black metal exterior, stainless steel construction. Max temperature 230°F. IPX4 rated. 240V \/ 1-phase. 6.5kW: 30A breaker, 10 AWG. 9kW: 50A breaker, 8 AWG. 10.5kW: 50A breaker, 8 AWG. Award-winning design. Made in Estonia by HUUM. 3-year private \/ 1-year commercial warranty.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6.5kW \/ 9kW \/ 10.5kW - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 566 cu ft depending on output\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance - tightest in class\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFull bench integration option\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMatte black metal exterior\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e66 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black control included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompact 15.2\" x 15.2\" square footprint\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIPX4 wet area rated\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAward-winning design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3-year private warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications \u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOutput selection - choose at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.5kW\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft | 30A breaker | 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9kW\u003c\/td\u003e\n\u003ctd\u003e283 to 460 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10.5kW\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage (all)\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDimensions and weight (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e42 lbs (19 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFootprint\u003c\/td\u003e\n\u003ctd\u003eSquare - 15.2\" x 15.2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - sidewall, corner, or bench embedded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eStones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e66 lbs (30 kg) - all variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm (2-4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 2 boxes included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety distances (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides - combustible materials\u003c\/td\u003e\n\u003ctd\u003e2\" (50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling clearance\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench integration\u003c\/td\u003e\n\u003ctd\u003ePermitted - full-length embedding in bench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl and performance\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi capability\u003c\/td\u003e\n\u003ctd\u003eNo - upgrade to UKU WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F (40°C to 110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP rating\u003c\/td\u003e\n\u003ctd\u003eIPX4 - wet area approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHUUM app\u003c\/td\u003e\n\u003ctd\u003eCompatible with UKU WiFi upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior\u003c\/td\u003e\n\u003ctd\u003eMatte black metal casing with black steel inlay\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrivate use warranty\u003c\/td\u003e\n\u003ctd\u003e3 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Black heater (6.5kW, 9kW, or 10.5kW - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Local Black control panel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eSauna stones - 2 boxes (66 lbs total)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable leveling legs (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional upgrades:\u003c\/strong\u003e UKU WiFi control panel, UKU Glass panel, wood side panels (alder, aspen, thermo-aspen). A licensed electrician is required for all connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Black Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" safety clearance - fits anywhere\u003c\/div\u003e\n\u003cp\u003eOnly 2 inches of clearance required from combustible materials on all sides. The smallest safety envelope of any floor-standing heater in this catalog. The compact 15.2\" x 15.2\" square footprint combined with 2-inch clearance gives the CORE installation flexibility that larger heaters physically cannot offer - including full embedding within the sauna bench.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eBench integration - the heater becomes the bench\u003c\/div\u003e\n\u003cp\u003eThe CORE can be embedded lengthwise within the sauna bench so the stone mass sits at bench level. The top of the heater should not be lower than the bench surface, and air movement beneath the bench must not be obstructed. This is the most design-integrated heater installation option available at any output level in this catalog.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThree outputs - same physical heater\u003c\/div\u003e\n\u003cp\u003e6.5kW, 9kW, and 10.5kW are all the same 32.7\" x 15.2\" x 15.2\" unit at 42 lbs with 66 lbs stone capacity. Choose the largest output the electrical supply will support - a larger heater heats faster, runs at lower duty cycle, and places less thermal stress on elements over its service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eMax 230°F - highest temperature range in catalog\u003c\/div\u003e\n\u003cp\u003eThe UKU control allows temperature setting from 104°F to 230°F. Most heaters in this catalog are limited to 175°F or 194°F. The CORE's 230°F ceiling gives serious sauna bathers the option for Finnish-style extreme heat sessions that other heaters cannot reach.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU ecosystem - upgradeable control\u003c\/div\u003e\n\u003cp\u003eThe included UKU Local Black is the entry-level panel. The same wiring and connection architecture supports the UKU WiFi (adds remote preheat and HUUM app), UKU Glass, and UKU Wood panels. Upgrading later requires only swapping the panel - no rewiring. The full HUUM control ecosystem is accessible from day one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAward-winning design, made in Estonia\u003c\/div\u003e\n\u003cp\u003eHUUM was founded in Estonia and makes all its heaters there. The CORE received the European Product Design Award. The matte black exterior with black steel inlay is a finished design, not a utilitarian finish. 3-year private use warranty. SGS Listed for the US market. Adjustable leveling legs included for uneven sauna floors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CORE Black sauna heater package showing matte black exterior, UKU Local Black control, and compact square footprint\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Black-Local-Black.jpg?v=1778745401\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - award-winning design\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Black. Estonian sauna engineering in a form that installs anywhere.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer known for the DROP (the teardrop-shaped stainless heater) and the CLIFF (the wall-mounted flat-profile model). The CORE is their answer to a different question: how small can a floor-standing heater be, and where can it go? At 15.2\" x 15.2\" with a 2-inch safety clearance, the answer is: very small, and practically anywhere - including inside the bench. The CORE Black delivers the same HUUM build quality and the same UKU control ecosystem in a form that suits compact saunas, modern minimalist interiors, and any installation where placement flexibility matters more than maximum stone volume.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - CORE Black heater, UKU Local Black control, and 2 boxes stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6.5kW \/ 9kW \/ 10.5kW\u003c\/strong\u003e - same physical heater, select output at checkout\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" safety clearance\u003c\/strong\u003e - installs in tight spaces and fully embedded in bench\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMax 230°F\u003c\/strong\u003e - highest temperature ceiling of any heater in this catalog\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS Listed, made in Estonia\u003c\/strong\u003e - 3-year private \/ 1-year commercial warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-CORE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM CORE User Manual US - PDF \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Warranty Information - PDF \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements - PDF \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements - PDF \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna - HUUM Heater Size Calculator \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e3-year private warranty \/ 1-year commercial warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Black is covered by a \u003cstrong\u003e3-year limited warranty for private (residential) use\u003c\/strong\u003e and a \u003cstrong\u003e1-year limited warranty for commercial use\u003c\/strong\u003e from the date of purchase. Heating elements are excluded from warranty coverage. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty is void if: the heater is connected to a GFI\/GFCI breaker, the buyer fails to follow the installation and operation manual, incorrect or insufficient stones are used, or the product is damaged by failure to follow instructions. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer. Full warranty terms are available at huumsauna.com.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black \/ 6.5 kW","offer_id":52218419642650,"sku":"129482","price":3303.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ 9 kW","offer_id":52218419675418,"sku":"129489","price":3417.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ 10.5 kW","offer_id":52218419708186,"sku":"129496","price":3565.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ 6.5 kW","offer_id":52218419740954,"sku":"129483","price":3616.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ 9 kW","offer_id":52218419773722,"sku":"129490","price":3730.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ 10.5 kW","offer_id":52218419806490,"sku":"129497","price":3878.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ 6.5 kW","offer_id":52218419839258,"sku":"129484","price":3565.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ 9 kW","offer_id":52218419872026,"sku":"129491","price":3679.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ 10.5 kW","offer_id":52218419904794,"sku":"129498","price":3827.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case \/ 6.5 kW","offer_id":52218419937562,"sku":"129485","price":3878.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case \/ 9 kW","offer_id":52218419970330,"sku":"129492","price":3992.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case \/ 10.5 kW","offer_id":52218420003098,"sku":"129499","price":4140.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ 6.5 kW","offer_id":52218420035866,"sku":"129487","price":3965.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ 9 kW","offer_id":52218420068634,"sku":"129494","price":4079.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ 10.5 kW","offer_id":52218420101402,"sku":"129501","price":4227.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ 6.5 kW","offer_id":52218420134170,"sku":"129486","price":4228.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ 9 kW","offer_id":52218420166938,"sku":"129493","price":4342.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ 10.5 kW","offer_id":52218420199706,"sku":"129500","price":4490.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ 6.5 kW","offer_id":52218420232474,"sku":"129488","price":4228.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ 9 kW","offer_id":52218420265242,"sku":"129495","price":4342.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ 10.5 kW","offer_id":52218420298010,"sku":"129502","price":4490.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/HUUM-CORE-Sauna-Heater-Package-Black-Local-Black.jpg?v=1778745401"},{"product_id":"huum-core-bk-st-pkg-core-series-sauna-heater-package-customizable-exterior-up-to-10-5kw","title":"HUUM CORE BK\/ST Pkg CORE Series Sauna Heater Package","description":"\u003c!-- HUUM CORE BK\/ST Pkg - Customizable Exterior, Up to 10.5kW --\u003e\u003c!-- Floor-standing | 240V\/1PH | Up to 566 cu ft | Complete package - UKU Local Black + stones included --\u003e\u003c!-- SKU: 129510 | CORE Series | Unfinished exterior for custom cladding --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CORE BK\/ST Pkg CORE Series Sauna Heater Package, Customizable Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CORE BK\/ST Package is the customizable version of the CORE - the same stainless steel frame, identical performance specifications, and identical room coverage and electrical requirements as the CORE Black, but without the outer matte black metal casing. The BK\/ST arrives with the stainless steel structure exposed and with an inlay finish (Black in this listing) as a starting point. The exposed frame accepts ceramic tiles, natural stone, glass panels, or wood cladding applied by the installer - making the CORE BK\/ST the only heater in this catalog where the finished exterior appearance is entirely determined by the buyer and their sauna builder. The package includes the CORE BK\/ST heater, UKU Local Black control, and sauna stones. All three output levels - 6.5kW, 9kW, and 10.5kW - are available at checkout and are physically identical in the unfinished state.\u003c\/p\u003e\n\u003ch4\u003eCustomizable exterior - tile, stone, glass, or wood\u003c\/h4\u003e\n\u003cp\u003eThe CORE BK\/ST is designed to be clad. The stainless steel frame with its inlay finish is the foundation; what surrounds it is the builder's choice. Ceramic tile is the most common application - the 2-inch safety clearance means the tile can be applied directly to the stainless frame surface and sit within the required safety envelope. Natural stone cladding, whether granite, soapstone, or slate, produces a heater that reads as a natural stone pillar in the sauna room. Glass panels create a modern, translucent finish. Wood side panels in alder, aspen, or thermo-aspen are available from HUUM as ready-made accessories that snap into the frame, providing a natural wood finish without custom fabrication. Any material that can be safely used in a sauna environment at sustained temperatures can be used on the BK\/ST frame - the only constraint is the safety distance maintained on all sides.\u003c\/p\u003e\n\u003ch4\u003eBK\/ST vs Black - the only difference is the exterior\u003c\/h4\u003e\n\u003cp\u003eThe CORE Black has a factory-applied matte black metal casing that ships as a finished product. The CORE BK\/ST ships without that outer casing, with the stainless steel frame and inlay finish exposed. In every technical specification - output levels, dimensions, weight, stone capacity, safety distances, electrical requirements, UKU control compatibility, maximum temperature, and warranty - the BK\/ST and Black are identical. The choice between them is a design decision: the Black is for buyers who want a finished product that installs without any cladding work; the BK\/ST is for buyers who want the heater to match a specific material palette in the sauna room that a factory finish cannot achieve.\u003c\/p\u003e\n\u003ch4\u003eSame CORE performance - 2\" clearance, bench embedding, 230°F max\u003c\/h4\u003e\n\u003cp\u003eAll the performance characteristics that define the CORE carry through to the BK\/ST. Only 2 inches of safety clearance from combustible materials on all sides - the most compact safety envelope of any floor-standing heater in this catalog - giving installation flexibility that larger heaters cannot match. Full bench embedding is permitted: the BK\/ST can be embedded lengthwise into the sauna bench with the stone surface at bench level, making the heater part of the bench structure. The UKU control supports temperatures from 104°F to 230°F - a higher ceiling than the Harvia KIP (60-minute timer max ~175°F) or most other heaters. At 66 lbs stone capacity across all three output levels, the CORE produces the direct rock-to-element steam that the stone mass and the open top design enable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete floor-standing sauna heater package with customizable exterior in three output levels: 6.5kW (177-318 cu ft), 9kW (283-460 cu ft), 10.5kW (354-566 cu ft) - select at checkout. Includes CORE BK\/ST heater (unfinished exterior, inlay finish selected at checkout), UKU Local Black control, and sauna stones. Exterior accepts tile, stone, glass, or wood cladding by installer. HUUM wood side panels (alder, aspen, thermo-aspen) available separately. All three variants physically identical: 32.7\"H x 15.2\"W x 15.2\"D, 42 lbs, 66 lb stone capacity. 2\" safety clearance all sides. Full bench integration permitted. Max temperature 230°F. IPX4 rated. 240V \/ 1-phase. 6.5kW: 30A \/ 10 AWG. 9kW or 10.5kW: 50A \/ 8 AWG. Made in Estonia by HUUM. 3-year private \/ 1-year commercial warranty.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6.5kW \/ 9kW \/ 10.5kW - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCustomizable exterior - tile, stone, glass, or wood\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInlay finish selected at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWood side panels available separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance all sides\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFull bench integration permitted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e66 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black control included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompact 15.2\" x 15.2\" square footprint\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIPX4 wet area rated\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3-year private warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications \u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOutput selection - choose at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.5kW\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft | 30A breaker | 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9kW\u003c\/td\u003e\n\u003ctd\u003e283 to 460 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10.5kW\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage (all)\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDimensions and weight (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e42 lbs (19 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - sidewall, corner, or bench embedded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eStones and exterior\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e66 lbs (30 kg) - all variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm (2-4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 2 boxes included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior finish\u003c\/td\u003e\n\u003ctd\u003eUnfinished frame + inlay finish (selected at checkout)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCladding options\u003c\/td\u003e\n\u003ctd\u003eTile, stone, glass, wood - applied by installer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHUUM wood panels\u003c\/td\u003e\n\u003ctd\u003eAlder, aspen, thermo-aspen - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety distances (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides - combustible materials\u003c\/td\u003e\n\u003ctd\u003e2\" (50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling clearance\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench integration\u003c\/td\u003e\n\u003ctd\u003ePermitted - full-length embedding in bench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl and performance\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi capability\u003c\/td\u003e\n\u003ctd\u003eNo - upgrade to UKU WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F (40°C to 110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP rating\u003c\/td\u003e\n\u003ctd\u003eIPX4 - wet area approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHUUM app\u003c\/td\u003e\n\u003ctd\u003eCompatible with UKU WiFi upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame material\u003c\/td\u003e\n\u003ctd\u003eStainless steel with inlay finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter casing\u003c\/td\u003e\n\u003ctd\u003eNone - customizable by installer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrivate use warranty\u003c\/td\u003e\n\u003ctd\u003e3 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE BK\/ST heater - unfinished frame with inlay finish (output and inlay selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Local Black control panel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eSauna stones - 2 boxes (66 lbs total)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable leveling legs (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eCladding not included - applied by installer:\u003c\/strong\u003e Tile, stone, glass, or wood. \u003cstrong\u003eHUUM wood side panels available separately:\u003c\/strong\u003e Alder, aspen, thermo-aspen. \u003cstrong\u003eOptional upgrades:\u003c\/strong\u003e UKU WiFi control, UKU Glass panel.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE BK\/ST Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eFully customizable exterior\u003c\/div\u003e\n\u003cp\u003eThe BK\/ST ships without an outer casing. Ceramic tile, natural stone, glass, or wood can be applied to the exposed stainless frame by the installer. HUUM wood side panels in alder, aspen, or thermo-aspen are available as ready-made accessories. The result is a heater whose exterior exactly matches the sauna room's material palette - something no factory-finished heater can offer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame CORE performance as the Black\u003c\/div\u003e\n\u003cp\u003eIdentical specs to the CORE Black in every technical dimension: same output levels, same dimensions (32.7\"H x 15.2\"W x 15.2\"D), same 66-lb stone capacity, same 2-inch safety clearance, same 230°F maximum temperature, same bench embedding option, same UKU control compatibility. The exterior is the only thing that differs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" clearance - tile cladding within safety envelope\u003c\/div\u003e\n\u003cp\u003eWith only 2 inches of required safety clearance from combustible materials, tile cladding can be applied directly to the frame and sit within the safety envelope. A tiled CORE BK\/ST reads as a tiled pillar in the sauna room - indistinguishable from a custom-built stone element unless the viewer knows it is a heater inside.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eBench integration with custom cladding\u003c\/div\u003e\n\u003cp\u003eThe BK\/ST can be embedded lengthwise within the sauna bench, just like the CORE Black. With custom tile or stone cladding on a bench-embedded BK\/ST, the heater becomes a seamless part of the bench structure - a stone or tile mass that produces heat and steam from within the bench, with no visible heater element in the room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThree outputs - same unfinished frame\u003c\/div\u003e\n\u003cp\u003e6.5kW, 9kW, and 10.5kW are all the same physical frame. Choose the largest output the electrical supply supports. A larger heater heats faster, runs at lower duty cycle, and places less thermal stress on elements. The unfinished exterior looks identical regardless of output level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU ecosystem - upgradeable\u003c\/div\u003e\n\u003cp\u003eThe included UKU Local Black has no WiFi. The same wiring supports UKU WiFi (remote preheat and HUUM app), UKU Glass, and UKU Wood panels as future upgrades without rewiring. The full HUUM control ecosystem is accessible from the same connection architecture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Unfinished-Black-Local-Black.jpg?v=1778746679\u0026amp;width=800\" alt=\"HUUM CORE BK\/ST sauna heater package showing unfinished frame ready for custom tile, stone, glass or wood cladding\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - award-winning design\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE BK\/ST. The CORE for builders who want to finish the heater themselves.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer. The CORE BK\/ST is the blank canvas version of the CORE - the same stainless steel structure, performance, and UKU control compatibility as the CORE Black, shipped without the outer casing so the installer can apply any cladding that suits the sauna room. Tile, stone, glass, or wood - the BK\/ST accepts all of them. For sauna builders and designers who want a heater that disappears into the room's material composition rather than standing apart from it, the BK\/ST is the right choice. For buyers who want a finished product without any additional fabrication work, the CORE Black is the alternative.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCustomizable exterior\u003c\/strong\u003e - tile, stone, glass, or wood applied by installer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentical specs to CORE Black\u003c\/strong\u003e - same output, dimensions, performance, warranty\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2\" safety clearance, bench embedding, 230°F max\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - UKU Local Black and 2 boxes stones included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS Listed, made in Estonia\u003c\/strong\u003e - 3-year private \/ 1-year commercial warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eCORE Black vs CORE BK\/ST\u003c\/span\u003e\n\u003ch4\u003eCORE Black vs CORE BK\/ST - the only difference is the outer finish\u003c\/h4\u003e\n\u003cp\u003eBoth packages include the same UKU Local Black control and sauna stones. Both are available in 6.5kW, 9kW, and 10.5kW. Both share identical dimensions, weight, stone capacity, safety distances, electrical requirements, and warranty. The CORE Black ships with a factory-applied matte black metal casing - it installs as a finished product. The CORE BK\/ST ships without that casing, with the stainless frame and inlay finish exposed, ready for custom tile, stone, glass, or wood cladding by the installer. If the sauna room will be tiled, stone-clad, or built around a specific custom material, the BK\/ST is the correct choice. If a clean factory-finished black heater is preferred, the CORE Black is the alternative.\u003c\/p\u003e\n\u003cp\u003eA standard 2-pole breaker (30A for 6.5kW, 50A for 9kW and 10.5kW) and appropriate AWG wire are required. Do not connect to a GFI\/GFCI breaker. A licensed electrician is required for all connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-Core-Sauna-Heater-Without-Panels-1.jpg?v=1778769222\u0026amp;width=800\" alt=\"HUUM CORE BK\/ST unfinished frame showing stainless steel structure ready for custom cladding with sauna bench integration\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/huumsauna.com\/wp-content\/uploads\/2025\/11\/H1013L12_v9_CORE_user-manual_US_2025_PRINT.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM CORE User Manual US (PDF - huumsauna.com) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Warranty Information \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna - HUUM Heater Size Calculator \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e3-year private warranty \/ 1-year commercial warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE BK\/ST is covered by a \u003cstrong\u003e3-year limited warranty for private (residential) use\u003c\/strong\u003e and a \u003cstrong\u003e1-year limited warranty for commercial use\u003c\/strong\u003e from the date of purchase. Heating elements are excluded from warranty coverage. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty is void if: the heater is connected to a GFI\/GFCI breaker, the buyer fails to follow the installation and operation manual, incorrect or insufficient stones are used, or the product is damaged by failure to follow instructions. Custom cladding applied by the installer must not obstruct the required safety clearances or the air movement required beneath the heater when bench-embedded. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black \/ Black \/ 6.5kW","offer_id":52218902872346,"sku":"129510","price":3102.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Black \/ 9kW","offer_id":52218902905114,"sku":"129524","price":3222.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Black \/ 10.5kW","offer_id":52218902937882,"sku":"129538","price":3357.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 6.5kW","offer_id":52218902970650,"sku":"129503","price":3102.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 9kW","offer_id":52218903003418,"sku":"129517","price":3222.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 10.5kW","offer_id":52218903036186,"sku":"129515","price":3357.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local 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6.5kW","offer_id":52218903265562,"sku":"129512","price":3364.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ Black \/ 9kW","offer_id":52218903298330,"sku":"129526","price":3484.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ Black \/ 10.5kW","offer_id":52218903331098,"sku":"129540","price":3619.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ Stainless Steel \/ 6.5kW","offer_id":52218903363866,"sku":"129505","price":3364.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ Stainless Steel \/ 9kW","offer_id":52218903396634,"sku":"129519","price":3484.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ Stainless Steel \/ 10.5kW","offer_id":52218903429402,"sku":"129533","price":3619.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case \/ Black \/ 6.5kW","offer_id":52218903462170,"sku":"129513","price":3677.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood 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9kW","offer_id":52218903691546,"sku":"129529","price":3884.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ Black \/ 10.5kW","offer_id":52218903724314,"sku":"129543","price":4019.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ Stainless Steel \/ 6.5kW","offer_id":52218903757082,"sku":"129508","price":3764.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ Stainless Steel \/ 9kW","offer_id":52218903789850,"sku":"129522","price":3884.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass \/ Stainless Steel \/ 10.5kW","offer_id":52218903822618,"sku":"129536","price":4019.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ Black \/ 6.5kW","offer_id":52218903855386,"sku":"129514","price":4027.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ Black \/ 9kW","offer_id":52218903888154,"sku":"129528","price":4147.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ Black \/ 10.5kW","offer_id":52218903920922,"sku":"129542","price":4282.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ Stainless Steel \/ 6.5kW","offer_id":52218903953690,"sku":"129507","price":4027.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ Stainless Steel \/ 9kW","offer_id":52218903986458,"sku":"129521","price":4147.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold \/ Stainless Steel \/ 10.5kW","offer_id":52218904019226,"sku":"129535","price":4282.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ Black \/ 6.5kW","offer_id":52218904051994,"sku":"129516","price":4027.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ Black \/ 9kW","offer_id":52218904084762,"sku":"129530","price":4147.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ Black \/ 10.5kW","offer_id":52218904117530,"sku":"129544","price":4282.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror \/ 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.sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CORE Alder Pkg CORE Series Sauna Heater Package, Alder Wood Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CORE Alder Package is the natural wood version of the CORE - the same stainless steel frame and full CORE performance as the Black and BK\/ST, with pre-fitted alder wood side panels that ship as part of the heater. Where the CORE Black has a factory matte black metal casing and the CORE BK\/ST ships bare for custom cladding, the CORE Alder arrives as a finished product with warm alder wood already in place on the sides of the frame. Alder is one of the traditional sauna woods in Nordic and Estonian sauna culture - lightweight, heat-resistant, and naturally fragrant when warmed. The panel finish combines a selected inlay finish (Black in this listing) on the metal parts with the alder wood side panels on the visible faces, producing a heater that reads as a natural wood element in any sauna interior. The package includes the CORE Alder heater, UKU Local Black control, and sauna stones, across all three output levels selected at checkout.\u003c\/p\u003e\n\u003ch4\u003eAlder side panels - factory fitted, sauna-ready\u003c\/h4\u003e\n\u003cp\u003eAlder is the wood species most commonly used in Nordic sauna construction. It is dimensionally stable under heat, does not splinter, has a naturally warm pale-brown tone, and produces a subtle characteristic fragrance when warm. HUUM machines the alder panels to fit the CORE frame precisely - they snap into the stainless frame structure without adhesive and arrive pre-installed on the heater. No fabrication work is required from the installer. The alder panels cover the side faces of the heater while the stainless top rim with its inlay finish remains visible. Together they produce a heater that integrates naturally into alder, aspen, or spruce sauna interiors without the modern industrial contrast of the black model or the bare-frame appearance of the uncladded BK\/ST.\u003c\/p\u003e\n\u003ch4\u003eNatural wood finish - when the heater should complement the sauna\u003c\/h4\u003e\n\u003cp\u003eThe choice between CORE Black, CORE BK\/ST, and CORE Alder is a design decision. The CORE Black is for contemporary or dark-toned interiors where a matte black metal element fits the palette. The CORE BK\/ST is for sauna builders who want full control over the exterior material - tile, stone, glass, or custom wood chosen by the builder. The CORE Alder is for buyers who want a natural wood appearance without any fabrication work - a finished product that looks like it belongs in a traditional sauna room from the moment it is installed. Light cedar, spruce, aspen, and alder sauna interiors all pair naturally with the alder panels. The warm tone of the alder wood softens the industrial quality of the stainless steel frame and makes the heater a visual complement to the bench wood rather than a contrast element.\u003c\/p\u003e\n\u003ch4\u003eSame CORE performance in every dimension\u003c\/h4\u003e\n\u003cp\u003eThe CORE Alder is technically identical to the CORE Black and CORE BK\/ST in every specification: same three output levels (6.5kW, 9kW, 10.5kW), same 32.7\"H x 15.2\"W x 15.2\"D dimensions, same 42-lb heater weight, same 66-lb stone capacity, same 2-inch safety clearance from combustible materials on all sides, same full bench embedding option, same 230°F maximum temperature via the UKU control, and same 3-year private warranty. The alder wood panels do not change any of these parameters. They are a surface finish applied to the stainless frame, not a structural change to the heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete floor-standing sauna heater package with pre-fitted alder wood side panels in three output levels: 6.5kW (177-318 cu ft), 9kW (283-460 cu ft), 10.5kW (354-566 cu ft) - select at checkout. Includes CORE Alder heater (alder wood panels factory fitted, inlay finish selected at checkout), UKU Local Black control, and sauna stones. All three variants physically identical: 32.7\"H x 15.2\"W x 15.2\"D, 42 lbs, 66 lb stone capacity. 2\" safety clearance all sides. Full bench integration permitted. Max temperature 230°F. IPX4 rated. 240V \/ 1-phase. 6.5kW: 30A \/ 10 AWG. 9kW or 10.5kW: 50A \/ 8 AWG. Made in Estonia by HUUM. 3-year private \/ 1-year commercial warranty.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6.5kW \/ 9kW \/ 10.5kW - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePre-fitted alder wood side panels\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInlay finish selected at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo fabrication work required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance all sides\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFull bench integration permitted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e66 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black control included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompact 15.2\" x 15.2\" square footprint\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIPX4 wet area rated\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3-year private warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOutput selection - choose at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.5kW\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft | 30A breaker | 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9kW\u003c\/td\u003e\n\u003ctd\u003e283 to 460 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10.5kW\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage (all)\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDimensions and weight (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e42 lbs (19 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - sidewall, corner, or bench embedded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eExterior and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide panels\u003c\/td\u003e\n\u003ctd\u003eAlder wood - pre-fitted at factory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlay finish\u003c\/td\u003e\n\u003ctd\u003eSelected at checkout (Black default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop rim\u003c\/td\u003e\n\u003ctd\u003eStainless steel with inlay finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e66 lbs (30 kg) - all variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm (2-4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 2 boxes included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety distances (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides - combustible materials\u003c\/td\u003e\n\u003ctd\u003e2\" (50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling clearance\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench integration\u003c\/td\u003e\n\u003ctd\u003ePermitted - full-length embedding in bench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl and performance\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi capability\u003c\/td\u003e\n\u003ctd\u003eNo - upgrade to UKU WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F (40°C to 110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP rating\u003c\/td\u003e\n\u003ctd\u003eIPX4 - wet area approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHUUM app\u003c\/td\u003e\n\u003ctd\u003eCompatible with UKU WiFi upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide panels\u003c\/td\u003e\n\u003ctd\u003eAlder wood - factory fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrivate use warranty\u003c\/td\u003e\n\u003ctd\u003e3 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Alder heater with pre-fitted alder wood panels \u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Local Black control panel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e66 lbs of 2\" to 4\" (5-10 cm) Round Sauna Stones\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable leveling legs (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional upgrades:\u003c\/strong\u003e UKU WiFi control panel, UKU Glass panel. HUUM also offers CORE panels in aspen and thermo-aspen as alternative wood finishes.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Alder Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAlder wood panels - factory fitted, no work needed\u003c\/div\u003e\n\u003cp\u003eThe alder wood side panels arrive pre-installed on the CORE frame. No fabrication, no tile work, no adhesive. The CORE Alder installs as a finished natural wood heater from the moment it arrives. Alder is dimensionally stable in sauna heat, does not splinter, and produces a subtle warm fragrance when heated - one of the most traditional sauna wood species in Nordic construction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eNatural wood - pairs with traditional interiors\u003c\/div\u003e\n\u003cp\u003eThe alder panels pair naturally with light cedar, spruce, aspen, and alder sauna interiors. Where the CORE Black contrasts with lighter wood tones and the BK\/ST requires custom fabrication, the Alder model integrates into a traditional sauna room as a natural wood element. The warm pale-brown tone of the alder softens the stainless steel frame and complements the bench wood.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame CORE performance as Black and BK\/ST\u003c\/div\u003e\n\u003cp\u003eTechnically identical to the CORE Black in all specifications - same three outputs, same 32.7\"H x 15.2\"W x 15.2\"D dimensions, same 66-lb stone capacity, same 2-inch safety clearance, same bench embedding option, and same 230°F maximum temperature. The alder panels are a surface finish on the stainless frame, not a structural modification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" clearance and bench integration\u003c\/div\u003e\n\u003cp\u003eThe alder wood panels do not increase the safety clearance requirement. The CORE Alder still requires only 2 inches from combustible materials on all sides - the most compact safety envelope of any floor-standing heater in this catalog. Full bench embedding is permitted with the alder panels in place.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThree outputs - same alder panel exterior\u003c\/div\u003e\n\u003cp\u003e6.5kW, 9kW, and 10.5kW are all the same physical frame with the same alder panels. Choose the largest output the electrical supply supports. A larger heater heats faster, runs at lower duty cycle, and stresses elements less. The alder wood exterior looks and feels identical regardless of which output is selected.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eComplete package - nothing to source separately\u003c\/div\u003e\n\u003cp\u003eCORE Alder heater, UKU Local Black control, and 2 boxes of stones arrive together. No separate stone order, no control purchase, no panel installation. The only remaining requirement is the electrical connection by a licensed electrician and the selection of output and inlay finish at checkout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Alder-Black-Local-Black.jpg?v=1778763737\u0026amp;width=800\" alt=\"HUUM CORE Alder sauna heater package showing pre-fitted alder wood side panels with stainless steel frame and UKU Local Black control\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - award-winning design\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Alder. The CORE with a traditional Nordic wood finish, ready to install.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer. The CORE Alder is the natural wood version of the CORE series - the same performance and installation flexibility as the CORE Black, finished with alder wood side panels that arrive factory-fitted and require no additional work from the installer. Alder is a traditional sauna wood in Estonia and across the Nordic region, and the CORE Alder is the version of HUUM's compact floor-standing heater that belongs most naturally in a traditional sauna room. The same 2-inch safety clearance, bench embedding option, and UKU control compatibility are present in every configuration.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-fitted alder wood panels\u003c\/strong\u003e - factory installed, no fabrication work required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentical specs to CORE Black\u003c\/strong\u003e - same output, dimensions, performance, warranty\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2\" safety clearance, bench embedding, 230°F max\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - UKU Local Black and 2 boxes stones included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS Listed, made in Estonia\u003c\/strong\u003e - 3-year private \/ 1-year commercial warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eCORE Black vs BK\/ST vs Alder\u003c\/span\u003e\n\u003ch4\u003eChoosing between the three CORE exterior finishes\u003c\/h4\u003e\n\u003cp\u003eAll three packages include the same UKU Local Black control, sauna stones, and identical technical specifications. The CORE Black ships with a factory matte black metal casing - the contemporary, design-forward finish for modern and dark-toned sauna interiors. The CORE BK\/ST ships with the stainless frame exposed for custom tile, stone, glass, or wood cladding applied by the installer. The CORE Alder ships with alder wood side panels pre-fitted - no installation work, natural warm wood finish, ideal for traditional Nordic and light wood sauna rooms. If the sauna room has light cedar, spruce, aspen, or alder surfaces, the Alder model is the natural choice. If the room has dark cedar, black hardware, or contemporary materials, the Black model is more appropriate. If the design calls for a specific custom material finish, the BK\/ST is the right starting point.\u003c\/p\u003e\n\u003cp\u003eA standard 2-pole breaker (30A for 6.5kW, 50A for 9kW and 10.5kW) and appropriate AWG wire are required. Do not connect to a GFI\/GFCI breaker. A licensed electrician is required for all connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-core-6kw-240v-electric-sauna-heater-1211913044.jpg?v=1778994462\u0026amp;width=800\" alt=\"HUUM CORE Alder heater with alder wood panels installed in light wood sauna room showing natural integration with bench and wall\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/huumsauna.com\/wp-content\/uploads\/2025\/11\/H1013L12_v9_CORE_user-manual_US_2025_PRINT.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM CORE User Manual US (PDF - huumsauna.com) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Warranty Information \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e3-year private warranty \/ 1-year commercial warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Alder is covered by a \u003cstrong\u003e3-year limited warranty for private (residential) use\u003c\/strong\u003e and a \u003cstrong\u003e1-year limited warranty for commercial use\u003c\/strong\u003e from the date of purchase. Heating elements are excluded from warranty coverage. The warranty covers defects in manufacturing and materials - including the alder wood panels - under normal use conditions. The warranty is void if: the heater is connected to a GFI\/GFCI breaker, the buyer fails to follow the installation and operation manual, incorrect or insufficient stones are used, or the product is damaged by failure to follow instructions. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Bank \/ Black \/ 6.5kW","offer_id":52229570494746,"sku":"129552","price":4042.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Bank \/ Black \/ 9kW","offer_id":52229570527514,"sku":"129553","price":4162.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Bank \/ Black \/ 10.5kW","offer_id":52229570560282,"sku":"129554","price":4297.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Bank \/ Stainless Steel \/ 6.5kW","offer_id":52229570593050,"sku":"129555","price":4164.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Bank \/ Stainless Steel \/ 9kW","offer_id":52229570625818,"sku":"129556","price":4284.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Bank \/ Stainless Steel \/ 10.5kW","offer_id":52229570658586,"sku":"129557","price":4419.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local 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@media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CORE Thermo-Aspen Pkg CORE Series Sauna Heater Package, Thermo-Aspen Wood Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CORE Thermo-Aspen Package is the premium wood version of the CORE - the same stainless steel frame and full CORE performance as the Black, BK\/ST, and Alder, with pre-fitted thermo-aspen wood side panels that ship as part of the heater. Thermo-aspen is aspen wood that has been heat-treated at high temperature in an oxygen-reduced environment. This thermal modification process alters the wood at a cellular level: it darkens the tone from aspen's natural pale cream to a warm rich brown, substantially increases dimensional stability under humidity cycling, reduces moisture absorption, and extends the wood's durability in high-heat, high-humidity environments such as a sauna. The result is a wood that looks more like aged hardwood or teak than fresh aspen, ages more gracefully in sauna conditions, and is more resistant to the warping and checking that untreated wood can develop over years of repeated heating and cooling cycles. The package includes the CORE Thermo-Aspen heater, UKU Local Black control, and sauna stones, in all three output levels selected at checkout.\u003c\/p\u003e\n\u003ch4\u003eThermo-aspen vs standard alder - what thermal modification changes\u003c\/h4\u003e\n\u003cp\u003eComparing the CORE Alder and CORE Thermo-Aspen is a comparison between two different wood species and processing methods. Alder is a pale-brown softwood used in Nordic sauna construction for generations - it is light, naturally stable enough for sauna use, and has a warm soft-grain appearance. Thermo-aspen starts as aspen (a lighter, finer-grained wood than alder) and is then heat-treated to change its properties. The thermal modification reduces the wood's equilibrium moisture content, which means it takes on and releases moisture more slowly during the heat cycles of sauna use - reducing dimensional movement and the surface checking that moisture cycling produces. The colour shifts to a richer warm brown that reads as more premium than either natural alder or natural aspen. Thermo-aspen is the more durable and visually refined of the two wood options on the CORE. Both are appropriate for sauna environments; thermo-aspen is the choice for buyers who want the longest-lasting wood finish with the deepest tone.\u003c\/p\u003e\n\u003ch4\u003ePre-fitted panels - installs as a finished product\u003c\/h4\u003e\n\u003cp\u003eLike the CORE Alder, the Thermo-Aspen model arrives with the wood side panels already installed on the stainless steel frame by HUUM's factory. No fabrication work, no panel installation, no adhesive. The thermo-aspen panels cover the visible side faces of the heater while the stainless top rim with its selected inlay finish remains exposed. The combination of the rich dark-brown thermo-aspen wood and the stainless metal inlay produces a premium appearance that pairs well with thermally modified wood benches and walls, dark cedar, and any sauna interior where a refined, aged-wood aesthetic is the design goal. In lighter natural wood saunas, the darker thermo-aspen creates a deliberate material contrast rather than blending into the background.\u003c\/p\u003e\n\u003ch4\u003eSame CORE performance in every dimension\u003c\/h4\u003e\n\u003cp\u003eThe CORE Thermo-Aspen is technically identical to the CORE Black, BK\/ST, and Alder in every specification. Same three output levels (6.5kW, 9kW, 10.5kW), same 32.7\"H x 15.2\"W x 15.2\"D dimensions, same 42-lb heater weight, same 66-lb stone capacity, same 2-inch safety clearance from combustible materials on all sides, same full bench embedding option, same 230°F maximum temperature, and same 3-year private warranty. The thermo-aspen panels are a surface treatment on the stainless frame - no technical specification changes between this and any other CORE package variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete floor-standing sauna heater package with pre-fitted thermo-aspen wood side panels in three output levels: 6.5kW (177-318 cu ft), 9kW (283-460 cu ft), 10.5kW (354-566 cu ft) - select at checkout. Includes CORE Thermo-Aspen heater (thermo-aspen panels factory fitted, inlay finish selected at checkout), UKU Local Black control, and sauna stones. Thermo-aspen: heat-treated aspen - richer dark-brown tone, enhanced moisture stability, longer-lasting than natural wood in sauna conditions. All three variants: 32.7\"H x 15.2\"W x 15.2\"D, 42 lbs, 66 lb stone capacity. 2\" safety clearance all sides. Full bench integration permitted. Max temperature 230°F. IPX4 rated. 240V \/ 1-phase. 6.5kW: 30A \/ 10 AWG. 9kW or 10.5kW: 50A \/ 8 AWG. Made in Estonia by HUUM. 3-year private \/ 1-year commercial warranty.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6.5kW \/ 9kW \/ 10.5kW - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePre-fitted thermo-aspen wood side panels\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHeat-treated - richer tone, enhanced durability\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInlay finish selected at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo fabrication work required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance all sides\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFull bench integration permitted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e66 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black control included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompact 15.2\" x 15.2\" square footprint\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIPX4 wet area rated\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3-year private warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications \u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOutput selection - choose at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.5kW\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft | 30A breaker | 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9kW\u003c\/td\u003e\n\u003ctd\u003e283 to 460 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10.5kW\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage (all)\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDimensions and weight (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e42 lbs (19 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - sidewall, corner, or bench embedded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eExterior and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide panels\u003c\/td\u003e\n\u003ctd\u003eThermo-aspen wood - pre-fitted at factory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermo-aspen treatment\u003c\/td\u003e\n\u003ctd\u003eHeat-treated - darker tone, enhanced moisture stability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlay finish\u003c\/td\u003e\n\u003ctd\u003eSelected at checkout (Black default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop rim\u003c\/td\u003e\n\u003ctd\u003eStainless steel with inlay finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e66 lbs (30 kg) - all variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm (2-4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 2 boxes included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety distances (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides - combustible materials\u003c\/td\u003e\n\u003ctd\u003e2\" (50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling clearance\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench integration\u003c\/td\u003e\n\u003ctd\u003ePermitted - full-length embedding in bench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl and performance\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi capability\u003c\/td\u003e\n\u003ctd\u003eNo - upgrade to UKU WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F (40°C to 110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP rating\u003c\/td\u003e\n\u003ctd\u003eIPX4 - wet area approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHUUM app\u003c\/td\u003e\n\u003ctd\u003eCompatible with UKU WiFi upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide panels\u003c\/td\u003e\n\u003ctd\u003eThermo-aspen wood - factory fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrivate use warranty\u003c\/td\u003e\n\u003ctd\u003e3 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Thermo-Aspen heater with pre-fitted thermo-aspen panels (output and inlay finish selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Local Black control panel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eSauna stones - 2 boxes (66 lbs total)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable leveling legs (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional upgrades:\u003c\/strong\u003e UKU WiFi control panel, UKU Glass panel. HUUM also offers CORE panels in alder and aspen as alternative wood finishes.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Thermo-Aspen Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThermo-aspen - the premium wood option\u003c\/div\u003e\n\u003cp\u003eHeat-treated aspen with a richer dark-brown tone than natural alder or aspen. Thermal modification reduces moisture absorption and dimensional movement in sauna conditions, making thermo-aspen more stable and longer-lasting than untreated wood over years of repeated heating and cooling cycles. The panels arrive pre-fitted - no fabrication work needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDarker tone for refined interiors\u003c\/div\u003e\n\u003cp\u003eThermo-aspen's warm rich brown reads as a premium material alongside thermally modified wood benches, dark cedar, and contemporary design palettes where natural light wood would look too soft. It is the wood choice for sauna rooms that call for a darker, more aged-wood aesthetic rather than the pale freshness of alder.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eEnhanced moisture stability\u003c\/div\u003e\n\u003cp\u003eThe thermal modification process reduces the wood's equilibrium moisture content - it takes on and releases moisture more slowly during sauna heat cycles. This reduces the surface checking, warping, and cracking that untreated wood can develop over years of use in a high-humidity, high-temperature environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame CORE performance as all other variants\u003c\/div\u003e\n\u003cp\u003eTechnically identical to the CORE Black, BK\/ST, and Alder - same 32.7\"H x 15.2\"W x 15.2\"D, same 66-lb stone capacity, same 2-inch safety clearance, same bench embedding option, same 230°F maximum temperature. The thermo-aspen panels are a surface finish on the stainless frame, not a structural change.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" clearance and bench integration\u003c\/div\u003e\n\u003cp\u003eThe thermo-aspen wood panels do not increase the safety clearance requirement. Only 2 inches required from combustible materials on all sides. Full bench embedding permitted with the panels in place - the thermo-aspen surface at bench level creates a seamless wood material connection between the heater and bench structure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eComplete package - ready to install\u003c\/div\u003e\n\u003cp\u003eHeater with thermo-aspen panels, UKU Local Black control, and 2 boxes of stones. The only remaining steps are selecting output and inlay finish at checkout, and the electrical connection by a licensed electrician. No wood sourcing, no panel installation, no custom fabrication.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CORE Thermo-Aspen sauna heater package showing pre-fitted dark thermo-aspen wood panels with stainless frame and UKU Local Black control\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Thermo-Aspen-Black-Local-Black.jpg?v=1778781590\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - award-winning design\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Thermo-Aspen. The CORE with the premium wood finish for refined sauna interiors.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer. The CORE Thermo-Aspen is the premium wood version of the CORE series - the same stainless steel structure, CORE performance, and UKU control compatibility as every other CORE package, with thermo-aspen wood side panels that arrive pre-fitted and require no installation work. Thermo-aspen is the most durable and visually refined wood option in the CORE range - darker, more stable in sauna conditions, and more distinctive than natural alder or standard aspen. For sauna builders who want a natural wood heater finish at the premium end of the wood spectrum, the Thermo-Aspen is the correct choice.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-fitted thermo-aspen panels\u003c\/strong\u003e - heat-treated, darker tone, enhanced moisture stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentical specs to CORE Black\u003c\/strong\u003e - same output, dimensions, performance, warranty\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2\" safety clearance, bench embedding, 230°F max\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - UKU Local Black and 2 boxes stones included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS Listed, made in Estonia\u003c\/strong\u003e - 3-year private \/ 1-year commercial warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eAlder vs Thermo-Aspen - choosing the wood finish\u003c\/span\u003e\n\u003ch4\u003eCORE Alder vs CORE Thermo-Aspen - tone, durability, and design intent\u003c\/h4\u003e\n\u003cp\u003eBoth the Alder and Thermo-Aspen packages arrive with factory-fitted wood panels, identical technical specifications, and the same complete package contents. The difference is the wood species and its treatment. Alder is a pale warm-brown, natural, and light-grained - it integrates softly into traditional Nordic sauna rooms with aspen or spruce walls and light bench surfaces. Thermo-aspen is a richer dark warm-brown, heat-treated for enhanced stability, and more visually distinctive - it pairs with thermally modified wood benches, dark cedar, and refined contemporary sauna interiors where a deeper wood tone is part of the design intent. Both are appropriate for sauna use; thermo-aspen is the more durable finish with the more premium appearance.\u003c\/p\u003e\n\u003cp\u003eA standard 2-pole breaker (30A for 6.5kW, 50A for 9kW and 10.5kW) and appropriate AWG wire are required. Do not connect to a GFI\/GFCI breaker. A licensed electrician is required for all connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CORE Thermo-Aspen heater with dark thermo-aspen panels installed in sauna room alongside thermally modified bench\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Thermo-Aspen-Stainless-Wifi-Wood.jpg?v=1779012239\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-CORE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM CORE User Manual US - PDF \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Warranty Information (huumsauna.com) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Size Your Sauna \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e3-year private warranty \/ 1-year commercial warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Thermo-Aspen is covered by a \u003cstrong\u003e3-year limited warranty for private (residential) use\u003c\/strong\u003e and a \u003cstrong\u003e1-year limited warranty for commercial use\u003c\/strong\u003e from the date of purchase. Heating elements are excluded from warranty coverage. The warranty covers defects in manufacturing and materials - including the thermo-aspen wood panels - under normal use conditions. The warranty is void if: the heater is connected to a GFI\/GFCI breaker, the buyer fails to follow the installation and operation manual, incorrect or insufficient stones are used, or the product is damaged by failure to follow instructions. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black \/ Black \/ 6.5kW","offer_id":52229642649882,"sku":"129636","price":4164.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Black \/ 9kW","offer_id":52229643108634,"sku":"129650","price":4284.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Black \/ 10.5kW","offer_id":52229643141402,"sku":"129664","price":4419.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 6.5kW","offer_id":52229643174170,"sku":"129629","price":4164.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 9kW","offer_id":52229643206938,"sku":"129643","price":4284.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 10.5kW","offer_id":52229643239706,"sku":"129657","price":4419.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local 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padding: 0; margin: 1rem 0 0; }\n  .sl-check li { font-weight: 500 !important; line-height: 1.6 !important; color: #0f172a !important; padding: 10px 0 10px 22px; position: relative; border-bottom: 1px solid #e2e8f0; }\n  .sl-check li:last-child { border-bottom: none; }\n  .sl-check li::before { content: \"\"; position: absolute; left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-green { background: #f0fdf4; border: 1px solid #86efac; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: 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border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CORE Aspen Pkg CORE Series Sauna Heater Package, Aspen Wood Exterior, Up to 10.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CORE Aspen Package is the natural aspen version of the CORE - the same stainless steel frame and full CORE performance as every other CORE package variant, with pre-fitted aspen wood side panels that arrive factory-installed. Aspen is the palest and most neutral of the three wood options in the CORE range. Where alder has a warm pale-brown tone and thermo-aspen shifts to a rich dark-brown through heat treatment, natural aspen is a clean pale cream-white - the lightest and most minimal of the wood finishes. This makes the CORE Aspen the correct choice for sauna interiors built around very light materials: white aspen or clear spruce walls, minimal light-coloured bench surfaces, and contemporary sauna designs where the heater should introduce as little colour warmth as possible and simply blend into a light-toned palette. The package includes the CORE Aspen heater, UKU Local Black control, and sauna stones in all three output levels selected at checkout.\u003c\/p\u003e\n\u003ch4\u003eAspen - the palest wood in the CORE range\u003c\/h4\u003e\n\u003cp\u003eAspen is one of the most common sauna woods in Estonia and across the Baltic and Nordic regions. It is a fine-grained, pale cream-white hardwood that is naturally smooth and almost entirely free of resin - an important property in a sauna environment where resin can become sticky and unpleasant under sustained heat. Natural aspen does not colour the sauna air with fragrance the way alder does; it contributes minimally to the sensory environment and lets the sauna space itself dominate. The tone is the palest of any wood used in Nordic sauna construction - noticeably lighter than alder and dramatically lighter than thermo-aspen. For buyers who have built or are planning a very light, minimalist sauna interior - white aspen benches and walls, clear-finished spruce, or pale Nordic wood - the CORE Aspen is the heater that integrates most naturally into that palette.\u003c\/p\u003e\n\u003ch4\u003ePre-fitted panels - installs as a finished product\u003c\/h4\u003e\n\u003cp\u003eLike the CORE Alder and CORE Thermo-Aspen, the CORE Aspen arrives with wood side panels already installed on the stainless steel frame by HUUM's factory. No fabrication work, no panel installation, no wood sourcing. The aspen panels cover the visible side faces of the heater; the stainless top rim with its selected inlay finish remains exposed. The combination of pale cream-white aspen panels and the stainless top produces a heater that reads as a light, clean material element in the sauna room - distinct from the darker, more visually weighted alternatives in the CORE range.\u003c\/p\u003e\n\u003ch4\u003eSame CORE performance in every dimension\u003c\/h4\u003e\n\u003cp\u003eThe CORE Aspen is technically identical to every other CORE package variant in all specifications. Same three output levels (6.5kW, 9kW, 10.5kW), same 32.7\"H x 15.2\"W x 15.2\"D dimensions, same 42-lb heater weight, same 66-lb stone capacity, same 2-inch safety clearance from combustible materials on all sides, same full bench embedding option, same 230°F maximum temperature via the UKU control, and same 3-year private warranty. The aspen panels are a surface finish on the stainless frame - no technical specification changes between this and any other CORE package variant.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete floor-standing sauna heater package with pre-fitted aspen wood side panels in three output levels: 6.5kW (177-318 cu ft), 9kW (283-460 cu ft), 10.5kW (354-566 cu ft) - select at checkout. Includes CORE Aspen heater (aspen panels factory fitted, inlay finish selected at checkout), UKU Local Black control, and sauna stones. Aspen: pale cream-white, resin-free, the lightest wood tone in the CORE range - ideal for very light and minimalist sauna interiors. All three variants: 32.7\"H x 15.2\"W x 15.2\"D, 42 lbs, 66 lb stone capacity. 2\" safety clearance all sides. Full bench integration permitted. Max temperature 230°F. IPX4 rated. 240V \/ 1-phase. 6.5kW: 30A \/ 10 AWG. 9kW or 10.5kW: 50A \/ 8 AWG. Made in Estonia by HUUM. 3-year private \/ 1-year commercial warranty.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6.5kW \/ 9kW \/ 10.5kW - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePre-fitted aspen wood side panels\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003ePale cream-white - lightest CORE wood tone\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eResin-free - ideal for sauna environments\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInlay finish selected at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo fabrication work required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance all sides\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFull bench integration permitted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e66 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black control included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompact 15.2\" x 15.2\" square footprint\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIPX4 wet area rated\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMade in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3-year private warranty\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications \u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eOutput selection - choose at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e6.5kW\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft | 30A breaker | 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e9kW\u003c\/td\u003e\n\u003ctd\u003e283 to 460 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e10.5kW\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft | 50A breaker | 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage (all)\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDimensions and weight (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e15.2\" (385 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e42 lbs (19 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - sidewall, corner, or bench embedded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eExterior and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide panels\u003c\/td\u003e\n\u003ctd\u003eAspen wood - pre-fitted at factory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAspen tone\u003c\/td\u003e\n\u003ctd\u003ePale cream-white - lightest wood option in CORE range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResin content\u003c\/td\u003e\n\u003ctd\u003eResin-free - safe and clean in sauna heat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInlay finish\u003c\/td\u003e\n\u003ctd\u003eSelected at checkout (Black default)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop rim\u003c\/td\u003e\n\u003ctd\u003eStainless steel with inlay finish\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e66 lbs (30 kg) - all variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm (2-4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 2 boxes included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety distances (all variants identical)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides - combustible materials\u003c\/td\u003e\n\u003ctd\u003e2\" (50 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling clearance\u003c\/td\u003e\n\u003ctd\u003e32.7\" (830 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench integration\u003c\/td\u003e\n\u003ctd\u003ePermitted - full-length embedding in bench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl and performance\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWiFi capability\u003c\/td\u003e\n\u003ctd\u003eNo - upgrade to UKU WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e104°F to 230°F (40°C to 110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP rating\u003c\/td\u003e\n\u003ctd\u003eIPX4 - wet area approved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHUUM app\u003c\/td\u003e\n\u003ctd\u003eCompatible with UKU WiFi upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eConstruction and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSide panels\u003c\/td\u003e\n\u003ctd\u003eAspen wood - factory fitted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrivate use warranty\u003c\/td\u003e\n\u003ctd\u003e3 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial warranty\u003c\/td\u003e\n\u003ctd\u003e1 year (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CORE Aspen heater with pre-fitted aspen wood panels \u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Local Black control panel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e66 lbs of 2\" to 4\" (5-10 cm) Round Sauna Stones\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable leveling legs (4)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional upgrades:\u003c\/strong\u003e UKU WiFi control panel, UKU Glass panel. HUUM also offers CORE panels in alder and thermo-aspen as alternative wood finishes.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CORE Aspen Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003ePalest wood tone in the CORE range\u003c\/div\u003e\n\u003cp\u003eAspen is a pale cream-white, the lightest wood option on the CORE. Where alder is warm pale-brown and thermo-aspen is rich dark-brown, aspen reads as nearly white in sauna lighting. It is the correct choice for very light, minimalist sauna interiors where the heater should blend into the palette rather than introduce warmth or contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eResin-free - clean in sauna heat\u003c\/div\u003e\n\u003cp\u003eAspen is naturally resin-free. In sauna environments where sustained high temperatures can cause resins in some woods to become sticky or emit odours, aspen produces none of these effects. It is one of the traditional sauna woods in Nordic and Baltic regions precisely because of its clean behaviour at high temperatures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003ePre-fitted panels - no fabrication needed\u003c\/div\u003e\n\u003cp\u003eThe aspen panels arrive factory-installed on the CORE frame. No wood sourcing, no panel installation, no adhesive. The CORE Aspen installs as a finished natural wood heater from the moment it arrives. Select output and inlay finish at checkout, connect the electrician, and it is operational.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame CORE performance as all variants\u003c\/div\u003e\n\u003cp\u003eTechnically identical to the CORE Black, BK\/ST, Alder, and Thermo-Aspen - same 32.7\"H x 15.2\"W x 15.2\"D, same 66-lb stone capacity, same 2-inch safety clearance, same bench embedding option, same 230°F maximum temperature. The aspen panels are a surface finish, not a structural change.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" clearance and bench integration\u003c\/div\u003e\n\u003cp\u003eOnly 2 inches required from combustible materials on all sides. Full bench embedding permitted with the aspen panels in place. With pale aspen panels at bench level, the embedded CORE Aspen creates a seamless light-wood connection between the heater and the bench structure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eComplete package - ready to install\u003c\/div\u003e\n\u003cp\u003eHeater with aspen panels, UKU Local Black control, and 2 boxes of stones. Nothing to source separately. The only remaining steps are selecting output and inlay finish at checkout and the electrical connection by a licensed electrician.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Aspen-Black-Local-Black.jpg?v=1778782949\u0026amp;width=800\" alt=\"HUUM CORE Aspen sauna heater package showing pre-fitted pale aspen wood panels with stainless frame and UKU Local Black control\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - award-winning design\u003c\/span\u003e\n\u003ch4\u003eHUUM CORE Aspen. The CORE in the palest natural wood finish - for light and minimalist saunas.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater manufacturer. The CORE Aspen is the palest wood version of the CORE series - the same performance and UKU control compatibility as every other CORE package, with factory-fitted aspen wood panels in the pale cream-white tone that aspen is known for. For sauna designers and builders working with very light material palettes - white aspen walls, clear spruce, pale Nordic wood - the CORE Aspen is the heater that integrates without creating visual contrast. The same 2-inch safety clearance, bench embedding option, and complete package contents apply as with every other CORE variant.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-fitted aspen panels\u003c\/strong\u003e - pale cream-white, resin-free, factory installed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentical specs to CORE Black\u003c\/strong\u003e - same output, dimensions, performance, warranty\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e2\" safety clearance, bench embedding, 230°F max\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - UKU Local Black and 2 boxes stones included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSGS Listed, made in Estonia\u003c\/strong\u003e - 3-year private \/ 1-year commercial warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eAspen vs Alder vs Thermo-Aspen\u003c\/span\u003e\n\u003ch4\u003eChoosing between the three CORE wood finishes\u003c\/h4\u003e\n\u003cp\u003eAll three wood panel packages arrive factory-fitted with identical technical specifications and complete package contents. Aspen (this listing) is pale cream-white - the lightest and most neutral, for very light or minimalist saunas where the heater should disappear into the palette. Alder is warm pale-brown - the traditional Nordic sauna wood tone, suits cedar, spruce, and alder interior rooms. Thermo-aspen is rich dark-brown - heat-treated for enhanced durability and moisture stability, suits thermally modified bench wood, dark cedar, and refined contemporary interiors. The choice is purely aesthetic: match the heater wood tone to the dominant wood surface in the sauna room.\u003c\/p\u003e\n\u003cp\u003eA standard 2-pole breaker (30A for 6.5kW, 50A for 9kW and 10.5kW) and appropriate AWG wire are required. Do not connect to a GFI\/GFCI breaker. A licensed electrician is required for all connections.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-CORE-Sauna-Heater-Package-Aspen-Black-Wifi-Wood.jpg?v=1779367769\u0026amp;width=800\" alt=\"HUUM CORE Aspen heater with pale aspen wood panels in light minimalist sauna room showing cream-white tone alongside white aspen bench\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003cdiv class=\"sl-doc-links\"\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/huumsauna.com\/wp-content\/uploads\/2025\/11\/H1013L12_v9_CORE_user-manual_US_2025_PRINT.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM CORE Sauna Heater IOM (PDF) \u003c\/a\u003e \u003ca class=\"sl-doc-link\" href=\"https:\/\/huumsauna.com\/wp-content\/uploads\/2023\/03\/H200402L03_v8_UKU_4_1_User_Manual_US_PRINT.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM UKU Control IOM (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/huumsauna.com\/product\/core-electric-sauna-heater\/\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Warranty Information (huumsauna.com) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e3-year private warranty \/ 1-year commercial warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CORE Aspen is covered by a \u003cstrong\u003e3-year limited warranty for private (residential) use\u003c\/strong\u003e and a \u003cstrong\u003e1-year limited warranty for commercial use\u003c\/strong\u003e from the date of purchase. Heating elements are excluded from warranty coverage. The warranty covers defects in manufacturing and materials - including the aspen wood panels - under normal use conditions. The warranty is void if: the heater is connected to a GFI\/GFCI breaker, the buyer fails to follow the installation and operation manual, incorrect or insufficient stones are used, or the product is damaged by failure to follow instructions. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black \/ Black \/ 6.5kW","offer_id":52231010418970,"sku":"129594","price":4042.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Black \/ 9kW","offer_id":52231010451738,"sku":"129608","price":4162.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Black \/ 10.5kW","offer_id":52231010484506,"sku":"129622","price":4297.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 6.5kW","offer_id":52231010517274,"sku":"129587","price":4042.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 9kW","offer_id":52231010550042,"sku":"129601","price":4162.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local Black \/ Stainless Steel \/ 10.5kW","offer_id":52231010582810,"sku":"129615","price":4297.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local 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src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=J-8SBgtlGbeA1Z-m\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=HN_AGuduSqlp1jCz\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/-6fJDlij0v0?si=SmJEC7zxmGGegyci\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM DROP 4STU Pkg DROP Series 4.5kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- SKU: 534-BDL-DROP45STULB | DROP Series Package | 106-247 cu ft (adjusted) | Electric --\u003e\u003c!-- Model: DROP 4STU PKG | 4.5kW | Wall-mounted --\u003e\u003c!-- LB suffix = UKU Local controller + Bundle (heater + controller + stones) --\u003e\u003c!-- PACKAGE INCLUDES: DROP 4.5kW heater + UKU Local controller + 132 lbs stones (4 boxes, 5-10 cm) --\u003e\u003c!-- No UKU Extension Box required at 4.5kW --\u003e\u003c!-- 132 lbs stones (4 boxes, 5-10 cm rounded olivine) - NOTE: 5-10 cm not 3-5 cm --\u003e\u003c!-- Safety distances: see installation manual (front 16.5\" \/ sides vary - refer to manual) --\u003e\u003c!-- 240V\/1PH | 30A circuit breaker | 10AWG wire | Max 230°F --\u003e\u003c!-- Dimensions: 15.4\"W (390mm) x 13.2\"D (335mm) x 23.3\"H (590mm) | Weight: 24 lbs --\u003e\u003c!-- Optional: DROP safety railing | Flange D (bench embedding) | Drip Tray --\u003e\u003c!-- Ships via FedEx or UPS (not pallet) for the heater - stones may ship separately --\u003e\u003c!-- SGS certified | 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- Documents: DROP IOM | DROP Installation Video | DROP Elements Required | UKU IOM | UKU Installation Diagram | UKU Installation Video | Warranty | Stone Placement Video | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .dp 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.dp-brand-img { width: 100%; height: auto; border-radius: 8px; display: block; }\n  .dp-brand-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: #2563a8; background: #e8f0fa; border: 1px solid #bfd4ef; border-radius: 4px; padding: 4px 10px; margin-bottom: 0.75rem; }\n  .dp-brand1 h4, .dp-brand2 h4 { font-size: 22px !important; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.75rem; line-height: 1.3 !important; }\n  .dp-brand1 p, .dp-brand2 p { font-weight: 500 !important; line-height: 1.75 !important; color: #0f172a !important; margin: 0 0 0.9rem; }\n  .dp-brand1 p:last-child, .dp-brand2 p:last-child { margin: 0; }\n  .dp-check { list-style: none; padding: 0; margin: 1rem 0 0; }\n  .dp-check li { font-weight: 500 !important; line-height: 1.6 !important; color: #0f172a !important; padding: 10px 0 10px 22px; position: relative; border-bottom: 1px solid #e2e8f0; }\n  .dp-check li:last-child { border-bottom: none; }\n  .dp-check li::before { content: \"\"; position: absolute; left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .dp-check li strong { color: #0f172a !important; font-weight: 700; }\n  .dp-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .dp-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .dp-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .dp-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0 0 0.75rem; }\n  .dp-warranty p:last-child { margin: 0; }\n  .dp-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .dp-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .dp-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .dp-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .dp-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .dp-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .dp-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .dp-feat-grid { grid-template-columns: 1fr 1fr; }\n    .dp-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .dp-brand1, .dp-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .dp-brand2 { display: flex; flex-direction: column-reverse; }\n    .dp-brand1 h4, .dp-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .dp { padding: 0; }\n    .dp-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .dp-feat { padding: 0.8rem 0.9rem; }\n    .dp-inc-grid { grid-template-columns: 1fr; }\n    .dp-spec-grid { gap: 1.25rem; }\n    .dp-spec-table, .dp-spec-table tbody, .dp-spec-table tr, .dp-spec-table td { display: block; width: 100%; }\n    .dp-spec-table { border: none; }\n    .dp-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .dp-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .dp-spec-table td { border: none; padding: 1px 0; }\n    .dp-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .dp-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .dp-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"dp\"\u003e\n\u003cdiv class=\"dp-desc\"\u003e\n\u003cp\u003eThe HUUM DROP 4STU Package is the complete ready-to-operate bundle for the 4.5kW DROP electric sauna heater - including the heater, UKU Local controller, and 132 lbs of sauna stones (4 boxes, 5-10 cm rounded olivine). No UKU Extension Box is required at 4.5kW. The DROP is a fundamentally different heater from the STEEL and CLIFF series: where those heaters are floor-standing pillars, the DROP is a wall-mounted sculptural unit inspired by the silhouette of a falling water drop - a rounded, organic form that HUUM describes as softening and complementing the angular interior of a classic sauna, giving it a touch of elegance. The DROP is the most visually distinctive heater in the HUUM lineup and the winner of the Red Dot Design Award for product design. At 4.5kW and 132 lbs of stones for rooms from 106 to 247 adjusted cubic feet, the DROP 4STU Package covers the small to medium home sauna range. Stones are 5-10 cm rounded olivine - a different size from the 3-5 cm stones used in the CLIFF and STEEL series. The wall bracket mounts with the bottom of the bracket 12.2\" above the hard floor. Minimum wall thickness for structural mounting is 3.94\" (100mm). 240V\/1PH, 30A, 10AWG. Max 230°F. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eDROP - a water drop, not a pillar - wall-mounted sculptural focal point\u003c\/h4\u003e\n\u003cp\u003eThe HUUM DROP's design starts from a different premise than every other HUUM heater. Where the STEEL and CLIFF are floor-standing vertical pillars with stacked stone columns, the DROP is a wall-mounted rounded unit shaped after a single falling drop of water. HUUM's own description of the design intent: the DROP sauna heater is inspired by the purest element in nature - a drop of water. Its rounded design softens and complements the angular interior of a classic sauna, giving it a touch of elegance. The organic form is architectural as much as it is functional - a heater designed to be looked at and to become the focal point of the sauna room, not a utilitarian appliance tucked into a corner. HUUM's own website describes the DROP as the eye-catching focal point of each steam room. The Red Dot Design Award confirms this recognition: the DROP won for masterful craftsmanship and unique aesthetic - HUUM's third Red Dot award across their lineup, alongside the CLIFF and the earlier HIVE series awards.\u003c\/p\u003e\n\u003ch4\u003e132 lbs of stones - more than most wood-burning stoves\u003c\/h4\u003e\n\u003cp\u003eHUUM's own description of the DROP's stone capacity puts it in direct context: this compact wall-mounted heater can fit up to 132 lbs of stones, exceeding most wood-burning stoves and guaranteeing long-lasting steam. At 132 lbs (4 boxes, 5-10 cm rounded olivine) in a 15.4\"W x 13.2\"D x 23.3\"H wall-mounted unit, the DROP holds significantly more stone mass than the typical wall-mounted electric heater in the same output class. The stones are kept fully exposed in the heater - by keeping the stones exposed, the heater achieves better airflow to create gentler steam and optimal heat stability. The 5-10 cm stone size is larger than the 3-5 cm rounded olivine used in the CLIFF and STEEL series - this is a DROP-specific requirement and the two stone sizes are not interchangeable between heater series. A Stone Placement Video document is available to guide correct stone loading in the DROP's unique rounded stone basket.\u003c\/p\u003e\n\u003ch4\u003ePackage contents and installation notes\u003c\/h4\u003e\n\u003cp\u003eThe DROP 4STU Package (SKU 534-BDL-DROP45STULB) includes the DROP 4.5kW heater, UKU Local controller, and 132 lbs stones (4 boxes). No UKU Extension Box is required at 4.5kW - the Extension Box threshold begins at heaters over 9kW. The heater includes a heat diverter and heating element retainer as standard. The wall bracket positions the bottom of the heater 12.2\" above the hard floor. The minimum wall thickness for structural mounting is 3.94\" (100mm) - HUUM's installation guidance is explicit: do not mount the DROP to cedar paneling alone; anchor to wall framing. When embedding the DROP into a sauna bench using the optional Flange D (sold separately), at least 14.8\" of the heater must protrude above the bench surface. The optional DROP Drip Tray (sold separately) catches excess water that runs off the stones and prevents pooling on the floor. The optional DROP safety railing (sold separately) adds a protective barrier around the heater's hot stone surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-hook\"\u003e4.5kW wall-mounted electric sauna heater package for rooms from 106 to 247 adjusted cubic feet. DROP 4STU Pkg - complete package: DROP 4.5kW heater, UKU Local controller, and 132 lbs stones (4 boxes, 5-10 cm rounded olivine). No UKU Extension Box required. Water drop silhouette design - Red Dot Design Award winner. 132 lbs stones - more than most wood-burning stoves. Stones fully exposed - better airflow, gentler steam. Wall-mounted: bracket bottom 12.2\" above hard floor. Min wall thickness 3.94\" for structural mounting. Heat diverter and heating element retainer included. Stones are 5-10 cm (not 3-5 cm - DROP-specific). 15.4\"W x 13.2\"D x 23.3\"H - 24 lbs. Max 230°F. 240V\/1PH - 30A - 10AWG. Optional: DROP safety railing, Flange D bench embedding, Drip Tray. SGS certified. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"dp-badges\"\u003e\n\u003cspan class=\"dp-badge\"\u003e4.5 kW\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e106 to 247 cu ft (adjusted)\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003ePackage - DROP heater, UKU Local controller, and 132 lbs stones\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eWater drop silhouette - Red Dot Design Award winner\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e132 lbs stones included (4 boxes, 5-10 cm rounded olivine)\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eStones fully exposed - better airflow and gentler steam\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eMore stone capacity than most wood-burning stoves\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eWall-mounted - bracket bottom 12.2\" above hard floor\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eMin wall thickness 3.94\" - anchor to framing required\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eHeat diverter and element retainer included\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eStones are 5-10 cm - not 3-5 cm\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e15.4\"W x 13.2\"D x 23.3\"H - 24 lbs\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eMax 230°F\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e240V\/1PH - 30A - 10AWG\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"dp-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003ePackage contents\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater\u003c\/td\u003e\n\u003ctd\u003eHUUM DROP 4.5kW wall-mounted electric sauna heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController (included)\u003c\/td\u003e\n\u003ctd\u003eUKU Local controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 4.5kW - not included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones (included)\u003c\/td\u003e\n\u003ctd\u003e132 lbs \/ 60 kg (4 boxes, 5-10 cm rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat diverter\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating element retainer\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall mounting bracket\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e4.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e106 to 247 cu ft (adjusted) \/ 3-7 m3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e132 lbs \/ 60 kg (4 boxes, 5-10 cm rounded olivine) - included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm \/ 2-4 in (rounded olivine - DROP-specific)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone exposure\u003c\/td\u003e\n\u003ctd\u003eFully exposed - better airflow for gentler steam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eDROP design and awards\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eA falling drop of water - organic rounded form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Design Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity vs wood stoves\u003c\/td\u003e\n\u003ctd\u003e132 lbs - exceeds most wood-burning stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone placement guide\u003c\/td\u003e\n\u003ctd\u003eStone Placement Video available (see documents)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInterior effect\u003c\/td\u003e\n\u003ctd\u003eSoftens angular sauna interior - eye-catching focal point\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions and mounting\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e15.4 in (390 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e13.2 in (335 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e23.3 in (590 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e24 lbs (11 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracket mounting height\u003c\/td\u003e\n\u003ctd\u003eBottom of bracket 12.2\" above hard floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMin wall thickness\u003c\/td\u003e\n\u003ctd\u003e3.94 in (100 mm) - must anchor to framing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embed protrusion\u003c\/td\u003e\n\u003ctd\u003eMin 14.8\" above bench surface when embedded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage\u003c\/td\u003e\n\u003ctd\u003e18.8A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e30A dedicated circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 4.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eUKU Local controller (included)\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eController type\u003c\/td\u003e\n\u003ctd\u003eUKU Local - physical wall panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote \/ app control\u003c\/td\u003e\n\u003ctd\u003eNot available with UKU Local\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegration\u003c\/td\u003e\n\u003ctd\u003eCompatible with lights, ventilation, steamer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUpgrade option\u003c\/td\u003e\n\u003ctd\u003eUKU Wi-Fi controller available separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eCertifications, warranty, and DROP-specific accessories\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eDROP safety railing (DROP-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eFlange D (DROP-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater management\u003c\/td\u003e\n\u003ctd\u003eDROP Drip Tray - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"dp-inc-grid\"\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eHUUM DROP 4.5kW wall-mounted electric sauna heater\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eUKU Local controller (physical wall panel)\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003e132 lbs sauna stones ( 5-10 cm rounded olivine)\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eHeat diverter\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eHeating element retainer\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eWall mounting bracket\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eDROP Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eUKU Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e Licensed electrician for wiring (240V\/1PH, 30A dedicated circuit, 10AWG wire). Must anchor to wall framing - min 3.94\" wall thickness. \u003cstrong\u003eOptional accessories (sold separately - DROP-specific):\u003c\/strong\u003e DROP safety railing; Flange D bench embedding flange; DROP Drip Tray. To upgrade to Wi-Fi and app control, the UKU Wi-Fi controller is available separately.\u003c\/p\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 4STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"dp-feat-grid\"\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eComplete package - heater, controller, and stones in one order\u003c\/div\u003e\n\u003cp\u003eThe DROP 4STU Package includes the DROP 4.5kW heater, UKU Local controller, and 132 lbs of 5-10 cm rounded olivine stones (4 boxes) together. The DROP requires a UKU controller for all operation - the heater has no built-in controls. Purchasing the heater alone requires separately sourcing both the controller and the correct DROP-specific stones. This package assembles all three items in one order, ensures the correct stone size (5-10 cm, not the 3-5 cm used in CLIFF and STEEL), and includes the Stone Placement Video as a document to guide correct loading in the DROP's unique rounded stone basket. No UKU Extension Box is required at 4.5kW.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eRed Dot Award - water drop design in a sauna room\u003c\/div\u003e\n\u003cp\u003eThe DROP won the Red Dot Design Award for product design - recognition of the combination of sculptural water-drop silhouette, brushed stainless steel finish, and the fully exposed stone basket that puts the 132-lb stone column at the visual centre of the heater. HUUM's description of the design effect is direct: the organic and minimalist design ensures it is the eye-catching focal point of each steam room. The rounded form visually softens the straight wooden lines of a traditional sauna interior in a way that a rectangular or pillar-format heater does not. For buyers who want their sauna heater to be architecturally considered as well as functionally excellent, the DROP is HUUM's purpose-built answer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003e132 lbs of stones - exceeds most wood-burning stoves\u003c\/div\u003e\n\u003cp\u003eHUUM's own marketing of the DROP's stone capacity places it in direct comparison with wood-burning stoves rather than other electric heaters: this compact wall-mounted heater can fit up to 132 lbs of stones, exceeding most wood-burning stoves. For an electric wall-mounted heater at 4.5kW, 132 lbs of stone mass is exceptional. The stones are fully exposed in the rounded basket - by keeping the stones exposed, the heater achieves better airflow to create gentler steam and optimal heat stability. The large stone thermal mass produces consistent, long-lasting steam and holds heat well after the heating elements cycle off - the same stone-primary performance principle that HUUM applies across their entire lineup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003e5-10 cm stones - DROP-specific - not 3-5 cm\u003c\/div\u003e\n\u003cp\u003eThe DROP uses 5-10 cm (2-4 in) rounded olivine stones - a different size from the 3-5 cm stones used in the CLIFF and STEEL series. This is not interchangeable: the DROP's stone basket geometry is designed for 5-10 cm stones, and using 3-5 cm stones would result in poor fit and uneven heat distribution. The 4 boxes of 5-10 cm rounded olivine included in the package are the correct DROP specification - no additional stone sourcing or size verification is needed. A Stone Placement Video is available in the documents section to guide correct arrangement of the stones in the DROP's unique rounded basket shape.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eWall-mounted - saves sauna floor space\u003c\/div\u003e\n\u003cp\u003eThe DROP's wall-mounted installation frees up sauna floor space that a floor-standing heater would occupy. At 24 lbs without stones, the DROP is the lightest heater in the HUUM lineup - significantly easier to handle during installation than the floor-standing STEEL or CLIFF models. The wall bracket positions the bottom of the heater 12.2\" above the hard floor. Anchoring to wall framing is required - minimum wall thickness is 3.94\" (100mm) and the heater must not be mounted to cedar paneling alone. The optional Flange D (sold separately) allows the DROP to be embedded into a sauna bench platform with at least 14.8\" of the heater protruding above the bench surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eDROP Series - 4.5kW, 6kW, 7.5kW, and 9kW configurations\u003c\/div\u003e\n\u003cp\u003eThe 534-BDL-DROP45STULB is the 4.5kW package configuration of the DROP Series. The DROP platform covers four output levels: DROP 4.5 (4.5kW, 106-247 cu ft, 30A\/10AWG, no Extension Box), DROP 6 (6kW, 30A\/10AWG, no Extension Box), DROP 7.5 (7.5kW, 40A\/8AWG, no Extension Box), and DROP 9 (9kW, 40A\/8AWG, no Extension Box). All four share the same water-drop silhouette, Red Dot Award winning design, fully exposed stone basket, 5-10 cm stone specification, DROP-specific accessories (Flange D, Drip Tray, safety railing), SGS certification, and 5-year limited warranty. UKU Extension Box is not required for any DROP model (all are 9kW or below). Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"dp-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM DROP 4STU Package 534-BDL-DROP45STULB 4.5kW wall-mounted electric sauna heater 106-247 cu ft 132 lbs stones Red Dot Award\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/DropPKG1.jpg?v=1778933531\u0026amp;width=800\" class=\"dp-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"dp-brand-tag\"\u003eDesigned in Estonia - SGS Certified - DROP Series - Red Dot Award - Complete Package\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 4STU Package. 4.5kW. 106-247 cu ft. Heater, UKU Local, 132 lbs stones. Red Dot winner.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The DROP 4STU Package is the complete ready-to-operate bundle for the Red Dot Award-winning DROP 4.5kW wall-mounted sauna heater - water drop silhouette, 132 lbs of fully exposed 5-10 cm stones (4 boxes), UKU Local controller, and heat diverter all included. No UKU Extension Box required. A licensed electrician is the only remaining requirement. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"dp-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.5kW electric\u003c\/strong\u003e - 106-247 cu ft - DROP water-drop wall-mounted design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed Dot Design Award winner\u003c\/strong\u003e - sauna room focal point\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local controller included\u003c\/strong\u003e - no Extension Box required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e132 lbs stones included (4 boxes, 5-10 cm)\u003c\/strong\u003e - exceeds most wood stoves\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSGS certified - 5-year warranty (excl. elements) - made in Estonia\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"dp-brand-tag\"\u003eDROP 4STU Pkg vs STEEL Mini 4 vs CLIFF 6 vs DROP 6 - HUUM electric heater guide\u003c\/span\u003e\n\u003ch4\u003eDROP 4STU Pkg vs STEEL Mini 4 vs CLIFF 6 vs DROP 6 - choosing the right HUUM electric heater\u003c\/h4\u003e\n\u003cp\u003eFour HUUM electric options serve different room sizes, aesthetics, and mounting preferences. STEEL Mini 4 H1007012: 3.5kW, 106-177 cu ft (adjusted), wall-mounted, 12.6\"W x 6\"D vertical pillar, 132 lbs stones (3-5 cm), 15A\/14AWG. Right for the smallest rooms where a slim vertical wall-mount and 3.5kW are the specification. DROP 4STU Pkg 534-BDL-DROP45STULB (this listing): 4.5kW, 106-247 cu ft (adjusted), wall-mounted, 15.4\"W x 13.2\"D x 23.3\"H rounded water-drop form, 132 lbs stones (5-10 cm), UKU Local + stones included, 30A\/10AWG, Red Dot Award winner. Right for the 106-247 cu ft range where a distinctive sculptural wall-mount and a complete ready-to-operate package are the priorities. CLIFF 6 H1004012: 6kW, 176-353 cu ft, floor-standing, open recycled-steel cage, 165 lbs stones (3-5 cm), 2.36\" side clearances, 30A\/10AWG. Right when floor-standing, 6kW, and the CLIFF's open-cage design are the specification. DROP 6 (package or heater): same DROP water-drop form at 6kW for a slightly larger room range than the DROP 4.5. Right when the DROP design is the priority but 6kW output is needed over 4.5kW.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM DROP 4STU Package wall-mounted water drop vs STEEL Mini wall pillar vs CLIFF 6 floor cage comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-DROP-blue-guard_3.jpg?v=1778939812\u0026amp;width=800\" class=\"dp-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"dp-manual\"\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eDROP Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eDROP Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cbr\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"dp-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 4.5kW carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operation manual, mounting to a wall without adequate structural support (minimum wall thickness 3.94\" \/ 100mm, must anchor to framing), use of incorrect stone type or size (must use 5-10 cm rounded olivine; decorative stones must not be used), or operating without the required stone load. The UKU Local controller included in the package carries its own separate HUUM warranty terms. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Bank","offer_id":52245876670746,"sku":"534-BDL-DROP45STULB","price":2716.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52245876703514,"sku":"534-BDL-DROP45STULB+WD","price":3029.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52245876769050,"sku":"534-BDL-DROP45STUWB","price":2978.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52245876801818,"sku":"534-BDL-DROP45STUWB+MR","price":3641.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52245876834586,"sku":"534-BDL-DROP45STUWB+WD","price":3291.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52245876900122,"sku":"534-BDL-DROP45STUWG","price":3378.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52245876932890,"sku":"534-BDL-DROP45STUWGD","price":3153.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/DropPKG1.jpg?v=1778933531"},{"product_id":"huum-drop-6stu-pkg-drop-series-6-0kw-sauna-heater-package","title":"HUUM DROP 6STU Pkg DROP Series 6.0kW Sauna Heater Package","description":"\u003c!-- HUUM DROP 6STU Package - 6.0kW Complete Sauna Heater Package with UKU Control and Stones --\u003e\u003c!-- Wall-mounted | 240V\/1PH | 177-318 cu ft | Complete package - control + 122 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-DROP6STULB | DROP Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- Red Dot Award winner | Made in Estonia | 5-year warranty (elements excluded) --\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=dCbiDkulruvs6U1m\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=_Lxln4zlEIqPTbrB\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003c!-- 9 document sections: DROP IOM | DROP Install Video | DROP Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Placement Video | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM DROP 6STU Pkg DROP Series 6.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM DROP 6STU Package is a complete sauna heater package for rooms from 177 to 318 cubic feet, including the award-winning DROP 6kW wall-mounted heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 122 lbs of rounded olivine diabase sauna stones. Everything needed to operate the heater arrives together. The DROP 6kW is the mid-range model in the DROP series, stepping up from the 4.5kW for the 177-318 cu ft room range while sharing the same external body dimensions, the same 122-lb stone capacity, and the same water-droplet design language. The 6kW requires the same 30A breaker and 10 AWG wire as the DROP 4.5, making it the largest DROP output level that fits a standard 30A residential circuit.\u003c\/p\u003e\n\u003ch4\u003eDROP 6kW - the largest DROP on a 30A circuit\u003c\/h4\u003e\n\u003cp\u003eThe DROP series is available in four output levels - 4.5kW, 6kW, 7.5kW, and 9kW. The 4.5kW and 6kW both run on 30A \/ 10 AWG circuits. The 7.5kW steps up to 40A \/ 8 AWG, and the 9kW requires 50A \/ 6 AWG. For buyers whose sauna room falls in the 177-318 cu ft range, the DROP 6kW is the correct and most electrically efficient choice - it handles rooms up to 80 cubic feet larger than the DROP 4.5 without requiring any additional electrical capacity beyond a standard 30A double-pole breaker. All four DROP models share identical external body dimensions at 15.4\"W x 13.2\"D x 23.3\"H - the physical size of the cage does not change between output levels, only the number of heating elements inside it.\u003c\/p\u003e\n\u003ch4\u003e122 lbs of stone - the DROP's defining specification\u003c\/h4\u003e\n\u003cp\u003eThe DROP 6kW carries the same 122 lbs (55 kg) of rounded olivine diabase stones as every model in the DROP series. This stone load is the characteristic that defines the DROP experience across all four output levels: more stone mass than most wood-burning stoves, direct element-to-stone contact for even heat distribution, and soft, long-lasting loyly when water is ladled over the stones. HUUM specifies rounded olivine diabase in 2\"-4\" (5-10 cm) size for the DROP specifically - the rounded form allows denser packing, better water flow between stones, and milder steam character than angular crushed stones. The 4 boxes of stones included in this package are the correct specification for the DROP 6.\u003c\/p\u003e\n\u003ch4\u003eUKU control - Local or WiFi, selected at checkout\u003c\/h4\u003e\n\u003cp\u003eThe package includes the UKU Local Black control as standard, with UKU WiFi available as an upgrade at checkout. The UKU Local Black is a digital sauna control that manages the heater on\/off, temperature, timer, and safety functions from panel-mounted buttons. The UKU WiFi variant adds HUUM app connectivity for iOS and Android - remote preheat from anywhere, session scheduling, and live temperature monitoring. Both UKU variants are fully compatible with the DROP 6kW without any extension box. The UKU Extension Box is only required for HUUM heaters over 11kW and is not needed for any model in the DROP series. The control mounts outside the sauna room or at the correct safety distance if inside.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 6kW wall-mounted sauna heater package for rooms from 177 to 318 cubic feet. Includes DROP 6kW heater, UKU control (Local Black or WiFi - select at checkout), and 122 lbs of rounded olivine diabase stones (4 boxes). The largest DROP output on a standard 30A \/ 10 AWG circuit. Same 122 lb stone capacity and body dimensions as all DROP models. Red Dot Award-winning water-droplet design. Direct stone-to-element contact for even heat. Soft, consistent, long-lasting steam. Stainless steel construction. 240V \/ 1-phase. 30A breaker, 10 AWG wire. Max 230°F. 2\" safety clearance all sides. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 122 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 318 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eLargest DROP on a standard 30A circuit\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRed Dot Award-winning design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWater-droplet inspired form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122 lb stone capacity - 4 boxes olivine included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMore stone mass than most wood-burning stoves\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSoft consistent steam - rounded olivine diabase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e240V \/ 1-phase - 30A breaker - 10 AWG\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStainless steel - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003e30 A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs (55 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 4 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x D x H)\u003c\/td\u003e\n\u003ctd\u003e15.4\" x 13.2\" x 23.3\" (390 x 335 x 590 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e24 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eWall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance\u003c\/td\u003e\n\u003ctd\u003e2\" all sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - only needed for heaters over 11kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDROP series output comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 4.5kW\u003c\/td\u003e\n\u003ctd\u003e106-248 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 7.5kW\u003c\/td\u003e\n\u003ctd\u003e248-389 cu ft | 40A \/ 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 9kW\u003c\/td\u003e\n\u003ctd\u003e318-460 cu ft | 50A \/ 6 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all four output levels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs - identical across all four\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty and awards\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award winner - product design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eWater droplet form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM DROP 6kW wall-mounted sauna heater - stainless steel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRounded olivine diabase sauna stones -  (132 lbs)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eWall mount bracket and hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM safety railing (recommended), HUUM Drip Tray, HUUM Flange D (for bench embedding). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 6STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eThe largest DROP on a standard 30A circuit\u003c\/div\u003e\n\u003cp\u003eThe DROP 6kW is the highest output in the DROP series that operates on a standard 30A \/ 10 AWG circuit - the same electrical specification as the DROP 4.5. For rooms from 177 to 318 cu ft, the 6kW is the most output available without stepping up to a 40A circuit. No panel upgrades, no heavier wire runs - the DROP 6 makes full use of a standard residential 30A breaker.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e122 lbs of stone - same as every DROP model\u003c\/div\u003e\n\u003cp\u003eAll four DROP output levels share the same 122-lb stone capacity. The DROP 6 carries the same thermal mass as the DROP 9 - the larger stone load relative to output means the 6kW delivers particularly soft, even steam for its room range. Direct element-to-stone contact throughout the basket ensures consistent heat distribution across all 122 lbs during the session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRed Dot Award design - water drop form\u003c\/div\u003e\n\u003cp\u003eWinner of Europe's prestigious Red Dot Award for product design, the DROP's water-droplet form is a structural design that enables the large rounded stone basket and the organic shape that softens angular sauna interiors. The DROP 6 is visually identical to every other DROP model - same body, same rounded silhouette, same design presence in the sauna room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eComplete package - nothing missing\u003c\/div\u003e\n\u003cp\u003eDROP 6kW heater, UKU control, and 4 boxes of rounded olivine diabase stones all included. The correct stone type and quantity for the DROP 6 are pre-specified. No separate stone sourcing required. Select UKU Local Black or UKU WiFi at checkout to complete the package to the required specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi option - preheat from anywhere\u003c\/div\u003e\n\u003cp\u003eUpgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android. Preheat on the way home, set a recurring schedule, and monitor the current temperature remotely. For a 177-318 cu ft sauna room that takes 30-45 minutes to reach temperature, the WiFi option removes the need to plan ahead at the panel - the sauna is ready when you arrive.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRounded olivine diabase - softer steam\u003c\/div\u003e\n\u003cp\u003eHUUM specifies rounded olivine diabase at 2\"-4\" for the DROP. Rounded stones pack more densely, allow better water flow when ladling, and produce milder, more consistent steam than angular crushed stones. Olivine diabase is thermally stable under repeated heating and water contact. The 4 boxes of correct-specification stones in this package are as important to the sauna experience as the heater itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-uku-local-black-huum-drop-series-4-5kw-sauna-heater-package-1182036283_c960ac9e-f0f8-4f0e-8349-f7e6085241f1.png?v=1782242265\u0026amp;width=800\" alt=\"HUUM DROP 6kW sauna heater package with UKU control and rounded olivine stones - Red Dot Award design\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - Red Dot Award winner\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 6STU. 6kW. 177-318 cu ft. The same award-winning stone mass on a standard 30A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company founded on the principle that electric sauna heaters should produce the quality of steam experience associated with traditional wood-burning stoves. The DROP is the product that defines HUUM - its Red Dot Award-winning water-droplet form, 122-lb stone capacity, and direct element-to-stone contact are all in service of soft, even, long-lasting loyly. The DROP 6STU Package includes everything needed to operate the heater: the DROP 6kW, the UKU control, and the correct stones. The DROP 6 is the correct choice for rooms from 177 to 318 cu ft where a 30A circuit is available. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - DROP 6kW, UKU control, and 122 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW, 177-318 cu ft\u003c\/strong\u003e - 240V\/1PH, 30A breaker, 10 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e122 lb stone capacity\u003c\/strong\u003e - same as all DROP models\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eLargest DROP output on a standard 30A circuit\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local or WiFi at checkout\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eChoosing between DROP 4.5 and DROP 6\u003c\/span\u003e\n\u003ch4\u003eDROP 4.5STU vs DROP 6STU - same circuit, different room coverage\u003c\/h4\u003e\n\u003cp\u003eThe DROP 4.5kW (106-248 cu ft) and DROP 6kW (177-318 cu ft) both run on a 30A \/ 10 AWG circuit - the same electrical installation serves either heater. The room ranges overlap between 177 and 248 cu ft. For a room in this overlap zone, the DROP 6 provides 33% more output for the same circuit specification - which is the appropriate choice for rooms with cold surfaces such as glass walls, tile floors, or natural stone or masonry panels that increase the effective room load. For well-insulated wood-walled rooms in the 177-248 cu ft overlap, either model is appropriate; the DROP 6 provides headroom. For rooms from 249 to 318 cu ft, the DROP 6 is the correct model. For rooms from 177-318 cu ft where the panel does not have capacity for a 30A double-pole breaker, contact BathingBrands for guidance on sizing options.\u003c\/p\u003e\n\u003cp\u003eAll DROP models share identical body dimensions and 122-lb stone capacity. The physical size of the heater does not change between output levels. The optional HUUM safety railing is recommended for all DROP installations. The UKU Extension Box is not required for any DROP model (4.5, 6, 7.5, or 9kW).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-DROP-blue-guard_3.jpg?v=1778939812\u0026amp;width=800\" alt=\"HUUM DROP 6kW and 4.5kW comparison showing identical body dimensions with different output specifications\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eDROP Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003eDROP Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eDROP Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 6STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52246411510042,"sku":"534-BDL-DROP6STULB","price":2888.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52246411542810,"sku":"534-BDL-DROP6STULB+WD","price":3201.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52246411608346,"sku":"534-BDL-DROP6STUWB","price":3150.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52246411641114,"sku":"534-BDL-DROP6STUWB+MR","price":3813.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52246411673882,"sku":"534-BDL-DROP6STUWB+WD","price":3463.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52246411739418,"sku":"534-BDL-DROP6STUWG","price":3550.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Gold","offer_id":52246411772186,"sku":"534-BDL-DROP6STUWGD","price":3325.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/DropPKG1.jpg?v=1778933531"},{"product_id":"huum-drop-9stu-pkg-drop-series-9-0kw-sauna-heater-package","title":"HUUM DROP 9STU Pkg DROP Series 9.0kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM DROP 9STU Package - 9.0kW Complete Sauna Heater Package with UKU Control and Stones --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=gDDKpEBIjp1pmoja\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=TW3DIqpOATH7hAbk\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\n\u003c\/h2\u003e\n\u003ch2\u003eHUUM DROP 9STU Pkg DROP Series 9.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- Wall-mounted | 240V\/1PH | 318-460 cu ft | Complete package - control + 122 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-DROP9STULB | DROP Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- Red Dot Award winner | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 9 document sections: DROP IOM | DROP Install Video | DROP Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Placement Video | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM DROP 9STU Package is a complete sauna heater package for rooms from 318 to 460 cubic feet, including the award-winning DROP 9kW wall-mounted heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 122 lbs of rounded olivine diabase sauna stones. The DROP 9kW is the highest output model in the DROP series - the top of the range for sauna rooms that exceed what the 4.5kW, 6kW, and 7.5kW models can cover. It shares the same external body dimensions, the same 122-lb stone capacity, and the same water-droplet design as every other DROP model. What changes at 9kW is the electrical requirement: a 50A breaker and 6 AWG wire, and the room coverage that steps up to 460 cubic feet.\u003c\/p\u003e\n\u003ch4\u003e9kW - the top of the DROP series for the largest rooms\u003c\/h4\u003e\n\u003cp\u003eThe DROP series runs from 4.5kW to 9kW across four models with identical external dimensions. At 9kW, the DROP covers sauna rooms from 318 to 460 cubic feet - the range appropriate for large residential saunas, multi-bench installations, and sauna rooms with significant cold surfaces (glass walls, tile floors, natural stone or masonry panels) that increase the adjusted room load beyond what a smaller model can effectively heat. The 9kW model has more heating elements inside the same cage as the 4.5, 6, and 7.5kW versions - the physical size of the basket and the 122-lb stone capacity are identical across all four output levels. For rooms at or approaching 460 cubic feet, the DROP 9 is the appropriate choice within the DROP series. For rooms exceeding 460 adjusted cubic feet, HUUM's STEEL or other higher-output models should be considered.\u003c\/p\u003e\n\u003ch4\u003e50A \/ 6 AWG - planning the electrical installation\u003c\/h4\u003e\n\u003cp\u003eThe DROP 9kW requires a dedicated 240V\/1-phase circuit with a 50A two-pole breaker and 6 AWG wire. This is a heavier electrical specification than the DROP 4.5 and 6 (both 30A \/ 10 AWG) and the DROP 7.5 (40A \/ 8 AWG). For new sauna installations where the electrical panel is being planned from scratch, specifying a 50A circuit for the DROP 9 is straightforward. For retrofits where the panel has limited capacity, it is worth confirming available breaker slots and panel headroom before ordering. All electrical work must be completed by a licensed electrician in compliance with local codes. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003ch4\u003e122 lbs of stone and UKU control - same specification as every DROP\u003c\/h4\u003e\n\u003cp\u003eThe DROP 9 carries the same 122-lb stone capacity as every DROP model and the same rounded olivine diabase stone specification: 2\"-4\" (5-10 cm) rounded stones for dense packing, good water flow when ladling, and soft, consistent steam throughout the session. The 4 boxes of stones included in this package are the correct type and quantity for the DROP 9. The UKU control is included - choose UKU Local Black for on-site digital control, or upgrade to UKU WiFi at checkout for HUUM app remote preheat and scheduling on iOS and Android. Neither variant requires an extension box for the DROP 9kW.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 9kW wall-mounted sauna heater package for rooms from 318 to 460 cubic feet. Includes DROP 9kW heater, UKU control (Local Black or WiFi - select at checkout), and 122 lbs of rounded olivine diabase stones (4 boxes). Top of the DROP series - maximum output in the same award-winning water-droplet body. Same 122 lb stone capacity and body dimensions as all DROP models. Red Dot Award-winning design. Direct stone-to-element contact for even heat. Soft, consistent, long-lasting steam. Stainless steel construction. 240V \/ 1-phase. 50A breaker, 6 AWG wire. Max 230°F. 2\" safety clearance all sides. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 122 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 460 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eTop of the DROP series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRed Dot Award-winning design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWater-droplet inspired form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122 lb stone capacity - 4 boxes olivine included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMore stone mass than most wood-burning stoves\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSoft consistent steam - rounded olivine diabase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e240V \/ 1-phase - 50A breaker - 6 AWG\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eStainless steel - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003e50 A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e6 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 460 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs (55 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 4 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x D x H)\u003c\/td\u003e\n\u003ctd\u003e15.4\" x 13.2\" x 23.3\" (390 x 335 x 590 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e24 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eWall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance\u003c\/td\u003e\n\u003ctd\u003e2\" all sides\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - only needed for heaters over 11kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDROP series output comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 4.5kW\u003c\/td\u003e\n\u003ctd\u003e106-248 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 7.5kW\u003c\/td\u003e\n\u003ctd\u003e248-389 cu ft | 40A \/ 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 9kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e318-460 cu ft | 50A \/ 6 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all four output levels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs - identical across all four\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty and awards\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award winner - product design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eWater droplet form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM DROP 9kW wall-mounted sauna heater - stainless steel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e132 lbs of 2\" - 4\" (5-10 cm) Round Sauna Stones\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eWall mount bracket and hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM safety railing (recommended), HUUM Drip Tray, HUUM Flange D (for bench embedding). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 9STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eTop of the DROP series - 9kW for large rooms\u003c\/div\u003e\n\u003cp\u003eThe DROP 9kW is the highest output in the DROP range, covering rooms from 318 to 460 cubic feet in the same compact wall-mounted body as the 4.5, 6, and 7.5kW models. For large residential saunas, multi-bench rooms, or rooms with cold surfaces that drive up the adjusted cubic footage, the DROP 9 is the correct DROP model. Rooms exceeding 460 adjusted cu ft require stepping up to HUUM's higher-output range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e122 lbs of stone - same as every DROP model\u003c\/div\u003e\n\u003cp\u003eThe DROP 9 carries the same 122-lb stone capacity as the 4.5, 6, and 7.5kW models. With more output driving the same stone mass, the DROP 9 reaches temperature faster and maintains it across larger room volumes. Direct element-to-stone contact throughout the full 122-lb load ensures consistent heat distribution and soft, long-lasting steam even in the largest rooms the DROP series covers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame body dimensions as all DROP models\u003c\/div\u003e\n\u003cp\u003eDespite being the highest output DROP, the 9kW is physically identical to the 4.5kW - same 15.4\"W x 13.2\"D x 23.3\"H cage, same 2\" safety clearances, same wall bracket. The heater footprint and installation requirements do not change with output level within the DROP series. A larger room requires the same amount of wall space and the same installation procedure as a smaller one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRed Dot Award design - the same in every room size\u003c\/div\u003e\n\u003cp\u003eThe water-droplet form that won the Red Dot Award applies identically to the DROP 9 as to every other DROP output level. The organic rounded body softens the angular interior of a large sauna room and makes the heater a design element rather than a utility appliance on the wall - the aesthetic effect is the same whether the room is 106 or 460 cubic feet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi option - preheat a large sauna remotely\u003c\/div\u003e\n\u003cp\u003eLarge sauna rooms take longer to reach temperature - a 400 cu ft room with a 9kW heater may need 45-60 minutes to reach bathing temperature. Upgrading to UKU WiFi at checkout makes remote scheduling essential rather than just convenient: start the preheat from the HUUM app before leaving work and arrive to a ready sauna, without needing to plan around the warm-up cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e50A \/ 6 AWG - plan the electrical before ordering\u003c\/div\u003e\n\u003cp\u003eThe DROP 9kW requires a 50A two-pole breaker and 6 AWG wire - heavier than the lower DROP models. Confirm that the electrical panel has a free 50A slot and sufficient remaining capacity before ordering. All wiring must be completed by a licensed electrician. Do not connect to a GFI\/GFCI breaker. The UKU Extension Box is not required for the DROP 9kW.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM DROP 9kW sauna heater package with UKU control and rounded olivine stones - Red Dot Award design\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/DropPKG1.jpg?v=1778933531\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - Red Dot Award winner\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 9STU. 9kW. 318-460 cu ft. The top of the DROP series - maximum output, same award-winning design.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company founded on the principle that electric sauna heaters should produce the quality of steam experience associated with traditional wood-burning stoves. The DROP 9STU Package is the complete top-of-range DROP installation: the 9kW heater, the UKU control, and 122 lbs of rounded olivine diabase stones - everything needed for a large sauna room up to 460 cubic feet. The same Red Dot Award-winning form, the same 122-lb stone capacity, and the same direct element-to-stone contact as every DROP model, at the output level required for the largest rooms in the DROP series. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - DROP 9kW, UKU control, and 122 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-460 cu ft\u003c\/strong\u003e - 240V\/1PH, 50A breaker, 6 AWG\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop of the DROP series\u003c\/strong\u003e - maximum output in the compact DROP body\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e122 lb stone capacity\u003c\/strong\u003e - same as all DROP models\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local or WiFi at checkout\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eChoosing the right DROP output level\u003c\/span\u003e\n\u003ch4\u003eWhich DROP is right - 4.5, 6, 7.5, or 9kW?\u003c\/h4\u003e\n\u003cp\u003eAll four DROP models share the same body, stone capacity, and design. The selection is based entirely on room size and adjusted cubic footage. DROP 4.5kW: 106-248 cu ft, 30A \/ 10 AWG. DROP 6kW: 177-318 cu ft, 30A \/ 10 AWG. DROP 7.5kW: 248-389 cu ft, 40A \/ 8 AWG. DROP 9kW: 318-460 cu ft, 50A \/ 6 AWG. Adjusted cubic footage accounts for cold surfaces - glass, tile, natural stone, and masonry all absorb heat and effectively increase the room load beyond the raw volume. A 350 cu ft room with a glass wall may have an adjusted load equivalent to 420-430 cu ft. Use HUUM's online calculator or contact BathingBrands for sizing guidance before selecting the output level. For rooms below 318 cu ft, the DROP 7.5 or lower is the appropriate model - the DROP 9 is oversized for small rooms and will not perform optimally at reduced output.\u003c\/p\u003e\n\u003cp\u003eA licensed electrician is required. Do not connect to a GFI\/GFCI breaker. The UKU Extension Box is not required for any DROP model (4.5 through 9kW). The optional HUUM safety railing is recommended for all DROP installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM DROP series 9kW top model comparison showing same body dimensions across 4.5 6 7.5 9kW output range\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-drop-sauna-heater-installed-mounted.jpg?v=1778939817\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eDROP Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eDROP Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Placement Video\u003c\/h6\u003e\n\u003ca href=\"https:\/\/youtu.be\/-6fJDlij0v0\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Stone Placement Video \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 9STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52247836786970,"sku":"534-BDL-DROP9STULB","price":3133.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52247836819738,"sku":"534-BDL-DROP9STULB+WD","price":3446.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52247836885274,"sku":"534-BDL-DROP9STUWB","price":3395.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52247836918042,"sku":"534-BDL-DROP9STUWB+MR","price":4058.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52247836950810,"sku":"534-BDL-DROP9STUWB+WD","price":3708.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52247837016346,"sku":"534-BDL-DROP9STUWG","price":3795.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52247837049114,"sku":"534-BDL-DROP9STUWGD","price":3570.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/DropPKG1.jpg?v=1778933531"},{"product_id":"huum-hive-12stux-pkg-hive-series-12-0kw-sauna-heater-package","title":"HUUM HIVE 12STUX Pkg HIVE Series 12.0kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM HIVE 12STUX Package - 12kW Complete Floor-Standing Sauna Heater Package --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=rIi3_oFtSaSlCWJ0\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM HIVE 12STUX Pkg HIVE Series 12.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- Floor-standing | 240V\/1PH | 424-636 cu ft | Complete - control + UKU Ext Box + 528 lbs stones --\u003e\u003c!-- SKU: 534-BDL-HIVE12STULB-WDX | HIVE Series | UKU Local w\/Wood Case or UKU WiFi at checkout --\u003e\u003c!-- X in model name = UKU Extension Box included | Air tunnel pre-installed | Ships on pallet --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 9 document sections matching DROP series format --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE 12STUX Package is a complete sauna heater package for large sauna rooms from 424 to 636 cubic feet, including the HIVE 12kW floor-standing heater, UKU sauna control with wood case (Local or WiFi - selected at checkout), UKU Extension Box, and 528 lbs of rounded olivine diabase sauna stones (16 boxes). The X in the model name designates that the UKU Extension Box is included - it is a required component for all HUUM heaters over 11kW and is not sold separately for this package. Everything needed to operate the HIVE 12 arrives together. The HIVE is a fundamentally different heater from HUUM's wall-mounted DROP series: it is a floor-standing unit with a beehive-inspired open cage design, a 22\" diameter cylindrical form, and a stone capacity of 528 lbs - more than four times the DROP's 122 lbs - making it the appropriate choice for the large sauna rooms that the DROP series cannot serve.\u003c\/p\u003e\n\u003ch4\u003eHIVE vs DROP - floor-standing vs wall-mounted, and why it matters for large rooms\u003c\/h4\u003e\n\u003cp\u003eThe DROP series (4.5kW through 9kW) is wall-mounted and covers rooms up to 460 cubic feet. The HIVE series begins at 12kW and covers rooms from 424 cubic feet upward - the two series overlap slightly, but the HIVE is the appropriate choice for rooms approaching and exceeding 500 cubic feet. The reason is not just output: a large sauna room requires not only more heat but more thermal mass in the stone load to sustain temperature and produce consistent steam throughout long sessions or back-to-back use with multiple bathers. The HIVE's 528-lb stone load provides thermal mass comparable to a large traditional wood-burning stove, and its open beehive cage design maximizes airflow through the stone mass for even, efficient heating. The floor-standing format means the HIVE stands directly on the sauna floor rather than being mounted to the wall, which also allows it to be partially embedded into a sauna bench for custom installations.\u003c\/p\u003e\n\u003ch4\u003eThe beehive design - open cage, maximum airflow, direct stone contact\u003c\/h4\u003e\n\u003cp\u003eThe HIVE is inspired by the form of a wild beehive - an open, structured cage of stainless steel fins that holds the stone mass while allowing air to circulate freely through the full stone volume from multiple directions simultaneously. This open cage geometry produces two outcomes: the stones are heated more evenly because air circulates through the entire mass rather than only from the heating elements at the base, and the steam produced when water is ladled is softer and more evenly distributed because the water contacts stones at multiple temperature levels within the pile rather than only the hottest stones at the top. The HIVE's pre-installed air tunnel reinforces this: it speeds up heating by approximately 25% by directing airflow more efficiently through the stone mass and also extends the life of the heating elements by reducing the thermal stress of the warm-up cycle.\u003c\/p\u003e\n\u003ch4\u003eDual 30A circuit - two separate breakers required\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 12kW requires two separate 30A circuit breakers and two runs of 10 AWG wire - a dual-circuit electrical installation that differs from the single-circuit requirements of the DROP series. Total draw is 50A across the two circuits. The UKU Extension Box (included in this package) is the component that manages this dual-circuit configuration and connects the two heater groups to the single UKU control panel. A licensed electrician must plan and install the dual-circuit wiring before the HIVE can be connected. The UKU Extension Box dimensions are 7\"W x 4\"D x 10\"H (178 x 101 x 254 mm) and it mounts on the wall outside the sauna room.\u003c\/p\u003e\n\u003ch4\u003e528 lbs of stone - pallet delivery and setup\u003c\/h4\u003e\n\u003cp\u003eThe 528 lbs of rounded olivine diabase stones included in this package (16 boxes) represent a significant weight and volume that changes the delivery and installation process from smaller heaters. The HIVE 12 package ships on a wooden pallet and requires a scheduled delivery appointment - it does not deliver as a standard parcel. The stones are loaded into the HIVE cage following the stone placement procedure shown in the Stone Placement Video in the documents section below. Correct stone placement in the HIVE is important for element life and steam quality - the Stone Requirements document provides the specifications for stone type, size, and loading pattern.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 12kW floor-standing sauna heater package for large rooms from 424 to 636 cubic feet. Includes HIVE 12kW heater, UKU control with wood case (Local or WiFi - select at checkout), UKU Extension Box (required for 12kW - included), and 528 lbs of rounded olivine diabase stones (16 boxes). Beehive-inspired open cage design - maximum airflow through full stone mass. Air tunnel pre-installed - 25% faster heating, extended element life. 528 lbs stone capacity - more than 4x the DROP series. Floor-standing - stands on sauna floor or embeds into bench. Dual 30A breakers + dual 10 AWG wire required. 240V \/ 1-phase. Max 230°F. SGS Listed. Ships on wooden pallet - scheduled delivery. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + ext box + 528 lbs stones\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e12 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e424 to 636 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing - not wall-mounted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBeehive-inspired open cage design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e528 lb stone capacity - 16 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAir tunnel pre-installed - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box included (X in model name)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local w\/Wood Case or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDual 30A breakers - dual 10 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eShips on wooden pallet - scheduled delivery\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e12 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal amperage draw\u003c\/td\u003e\n\u003ctd\u003e50 A (25A per circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breakers required\u003c\/td\u003e\n\u003ctd\u003eTwo separate 30A breakers (no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003eTwo runs of 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e424 to 636 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e528 lbs (16 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 16 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e22\" (560 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5\" (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e44.1 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel open cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing (or bench-embedded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel\u003c\/td\u003e\n\u003ctd\u003ePre-installed - 25% faster heat-up, extended element life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local w\/Wood Case\u003c\/td\u003e\n\u003ctd\u003eDigital control with thermo-ash wood enclosure - on-site\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired and included - 7\"W x 4\"D x 10\"H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE vs DROP comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 12kW (this listing)\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | 424-636 cu ft | 528 lbs stones | Dual 30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 9kW (largest DROP)\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | 318-460 cu ft | 122 lbs stones | Single 50A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003eHIVE carries 4x more stone mass than DROP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired for HIVE (12kW+) | Not required for DROP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDelivery and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery method\u003c\/td\u003e\n\u003ctd\u003eFreight on wooden pallet - scheduled appointment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eWild beehive - open cage form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE 12kW floor-standing sauna heater - stainless steel open cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control with wood case (Local or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable Legs\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e528 lbs of 2\" - 4\" (5-10 cm) Round Sauna Stones\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAir tunnel (pre-installed on heater)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM HIVE safety railing (recommended), reflector panels (allow closer wall installation), HIVE embedding flange (for bench mounting). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE 12STUX Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e528 lbs of stone - massive thermal mass\u003c\/div\u003e\n\u003cp\u003eAt 528 lbs (16 boxes), the HIVE 12 carries more than four times the stone mass of HUUM's DROP series. This thermal mass is what enables the HIVE to sustain consistent temperature and steam quality through long sessions and back-to-back use - the stone load stores enough heat to continue producing soft, even steam long after the elements have cycled. For rooms from 424 to 636 cu ft and any commercial or high-intensity use, this thermal mass is the correct specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOpen beehive cage - airflow through the full stone mass\u003c\/div\u003e\n\u003cp\u003eThe open stainless steel cage allows air to circulate through the entire 528-lb stone load from multiple directions simultaneously. Stones throughout the pile - not just those adjacent to the elements - are heated evenly. When water is ladled, it contacts stones at multiple temperature levels, producing a softer, more layered steam than a heater where only the top-surface stones are ladled. The beehive cage geometry is the engineering that makes this possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAir tunnel pre-installed - 25% faster heat-up, longer element life\u003c\/div\u003e\n\u003cp\u003eThe HIVE air tunnel directs airflow more efficiently through the stone mass during the warm-up cycle, reducing the time to reach bathing temperature by approximately 25% and reducing the thermal stress on the heating elements. The tunnel is pre-installed on the heater in this package - no separate installation required. It also means the effective stone load with the air tunnel in place is optimized for the 424-636 cu ft room range specified for this package.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU Extension Box included - the X in 12STUX\u003c\/div\u003e\n\u003cp\u003eThe X in the model name designates that the UKU Extension Box is included. This component is required for all HUUM heaters over 11kW and manages the dual-circuit electrical connection between the two 30A breakers and the single UKU control panel. Without it, the HIVE 12 cannot be connected to any UKU control. Including it in the package removes the need for a separate purchase and ensures all required components arrive together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU Local w\/Wood Case or WiFi - select at checkout\u003c\/div\u003e\n\u003cp\u003eThe standard UKU Local w\/Wood Case is a digital control in a thermo-ash wood enclosure that complements the natural aesthetics of a timber sauna interior. Upgrading to UKU WiFi adds HUUM app remote preheat and scheduling on iOS and Android. For a large 424-636 cu ft sauna room that takes 45-60 minutes to reach temperature, remote preheat via the WiFi option is especially practical - start the session from the app before leaving for the sauna.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eFloor-standing with bench-embedding option\u003c\/div\u003e\n\u003cp\u003eThe HIVE 12 stands directly on the sauna floor without wall mounting hardware - installation is simpler in that respect, though the dual-circuit electrical requirement must be planned. The HIVE embedding flange (sold separately) allows the heater to be partially inserted into a sauna bench for custom installations where the stove sits flush with the bench level. The optional reflector panels allow the heater to be installed closer to the sauna wall than standard safety clearances.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349\u0026amp;width=800\" alt=\"HUUM HIVE 12kW floor-standing sauna heater package with UKU control wood case, extension box, and 528 lbs olivine stones\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE 12STUX. 12kW. 424-636 cu ft. 528 lbs of stone. The complete large-sauna package.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE is HUUM's floor-standing heater series, designed for large sauna rooms and commercial installations where the DROP series's wall-mounted format and stone capacity are insufficient. The HIVE 12STUX Package includes every required component: the HIVE 12kW heater with pre-installed air tunnel, UKU control with wood case (Local or WiFi at checkout), UKU Extension Box, and 528 lbs of rounded olivine diabase stones in 16 boxes. Everything arrives on a wooden pallet via scheduled freight delivery. A licensed electrician is required for the dual-circuit electrical installation. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - HIVE 12kW, UKU control w\/wood case, UKU Ext Box, 528 lbs stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12kW, 424-636 cu ft\u003c\/strong\u003e - dual 30A breakers, dual 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e528 lb stone capacity\u003c\/strong\u003e - 4x the DROP series - massive thermal mass\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir tunnel pre-installed\u003c\/strong\u003e - 25% faster heat-up, extended element life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePallet delivery, scheduled appointment\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE vs DROP - choosing the right HUUM series\u003c\/span\u003e\n\u003ch4\u003eWhen to choose the HIVE over the DROP\u003c\/h4\u003e\n\u003cp\u003eThe DROP series (4.5kW through 9kW, wall-mounted, 122 lbs stones) covers sauna rooms up to 460 cubic feet on single-circuit electrical installations. The HIVE series (12kW and above, floor-standing, 528 lbs stones) begins at 424 cu ft and is designed for rooms where the DROP series cannot provide sufficient output or thermal mass. The overlap between 424 and 460 cu ft is where the choice matters most: a 450 cu ft room with standard wood walls and no cold surfaces can be served by either the DROP 9 or the HIVE 12. For that room, the DROP 9 is simpler to install and requires less electrical work; the HIVE 12 provides significantly more thermal mass and will sustain temperature better through back-to-back sessions. For rooms with glass, tile, or masonry cold surfaces, for commercial use, or for rooms above 460 cu ft, the HIVE 12 is the appropriate choice without ambiguity.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required. Two separate 30A breakers and two 10 AWG wire runs required. No GFI\/GFCI. The HIVE safety railing is recommended. Reflector panels allow closer wall installation. The HIVE embedding flange enables bench installation. All accessories sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/ai_heater-package_huum-mobile-app.jpg?v=1778943360\u0026amp;width=800\" alt=\"HUUM HIVE 12kW installed in large sauna room showing floor-standing beehive cage with stone mass visible\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE 12STUX Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, incorrect dual-circuit wiring, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to GFI\/GFCI breakers. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52248072716570,"sku":"534-BDL-HIVE12STULBX","price":5963.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52248072749338,"sku":"534-BDL-HIVE12STULB-WDX","price":6276.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52248072814874,"sku":"534-BDL-HIVE12STUWBX","price":6225.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52248072847642,"sku":"534-BDL-HIVE12STUWBX","price":6538.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52248072913178,"sku":"534-BDL-HIVE12STUWGX","price":6625.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52248072945946,"sku":"534-BDL-HIVE12STUWMRX","price":6888.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52248072978714,"sku":"534-BDL-HIVE12STUWGDX","price":6400.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349"},{"product_id":"huum-hive-15stux-pkg-hive-series-15-0kw-sauna-heater-package","title":"HUUM HIVE 15STUX Pkg HIVE Series 15.0kW Sauna Heater Package","description":"\u003c!-- HUUM HIVE 15STUX Package - 15kW Complete Floor-Standing Sauna Heater Package --\u003e\u003c!-- Floor-standing | 240V\/1PH | 530-813 cu ft | Complete - control + UKU Ext Box + 528 lbs stones --\u003e\u003c!-- SKU: 534-BDL-HIVE15STULB-WDX | HIVE Series | UKU Local w\/Wood Case or UKU WiFi at checkout --\u003e\u003c!-- X = UKU Extension Box included | Air tunnel pre-installed | Ships on pallet --\u003e\u003c!-- Dual 50A breakers + dual 8 AWG (heavier than HIVE 12's dual 30A \/ 10 AWG) --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 8 document sections per listing image: HIVE IOM | HIVE Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-green { background: #f0fdf4; border: 1px solid #86efac; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=J8Q03eKdwP0gV1Ak\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM HIVE 15STUX Pkg HIVE Series 15.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE 15STUX Package is a complete sauna heater package for large sauna rooms from 530 to 813 cubic feet, including the HIVE 15kW floor-standing heater, UKU sauna control with wood case (Local or WiFi - selected at checkout), UKU Extension Box, and 528 lbs of rounded olivine diabase sauna stones (16 boxes). The HIVE 15kW steps up from the 12kW with 25% more output for the same physical body and the same 528-lb stone capacity, covering the larger room range that the 12kW cannot serve. The key electrical difference from the HIVE 12: the 15kW requires dual 50A breakers and dual 8 AWG wire runs rather than the 12kW's dual 30A \/ 10 AWG - a heavier electrical specification that must be planned and confirmed before ordering.\u003c\/p\u003e\n\u003ch4\u003eHIVE 15 vs HIVE 12 - more output, heavier electrical, same body\u003c\/h4\u003e\n\u003cp\u003eAll three HIVE models - 12kW, 15kW, and 18kW - share identical external body dimensions: 22\" (560mm) diameter, 29.5\" (750mm) height. The physical footprint in the sauna room, the 528-lb stone capacity, the air tunnel, and the floor-standing installation method are the same across all three. What differs is the output level and the corresponding electrical requirement. The HIVE 12 runs on dual 30A breakers with 10 AWG wire. The HIVE 15 requires dual 50A breakers with 8 AWG wire. The HIVE 18 also uses dual 50A \/ 8 AWG. For rooms from 530 to 813 cubic feet where the HIVE 12's 424-636 cu ft range is insufficient, the HIVE 15 is the correct step up - provided the electrical panel can supply two 50A circuit breaker slots and the electrician can run two 8 AWG wire circuits to the UKU Extension Box location.\u003c\/p\u003e\n\u003ch4\u003e530-813 cu ft - large residential and commercial sauna rooms\u003c\/h4\u003e\n\u003cp\u003eThe 15kW range of 530-813 cu ft covers large residential sauna rooms, sauna cabins with multiple benches, and mid-size commercial installations in health clubs, day spas, and gyms. At 530 cubic feet, a sauna room is typically a dedicated structure rather than a converted interior room - a purpose-built sauna cabin, a detached sauna building, or a large home sauna room with two or more bench levels. At 813 cubic feet, the HIVE 15 is at the upper end of what a single 15kW heater can serve; rooms approaching this volume, or rooms with significant cold surfaces such as glass walls or tile floors, may require confirming the adjusted cubic footage before selecting between the 15kW and the 18kW. Use the HUUM heater calculator in the Size Your Sauna document below for guidance.\u003c\/p\u003e\n\u003ch4\u003e528 lbs of stone, air tunnel pre-installed - same as HIVE 12\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 15 carries the same 528-lb stone capacity as the HIVE 12 in the same beehive-inspired open cage. The air tunnel is pre-installed on the heater in this package, directing airflow more efficiently through the stone mass to speed up heating by approximately 25% and extend heating element life. The 16 boxes of rounded olivine diabase stones (2\"-4\", 5-10 cm) included in this package are the correct type and quantity for the HIVE 15. As with the HIVE 12, this package ships on a wooden pallet by freight and requires a scheduled delivery appointment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 15kW floor-standing sauna heater package for large rooms from 530 to 813 cubic feet. Includes HIVE 15kW heater, UKU control with wood case (Local or WiFi - select at checkout), UKU Extension Box (required for 15kW - included), and 528 lbs of rounded olivine diabase stones (16 boxes). Same beehive-inspired open cage body as HIVE 12 and 18 - 22\" diameter x 29.5\"H. Air tunnel pre-installed - 25% faster heating, extended element life. Dual 50A breakers + dual 8 AWG wire required (heavier than HIVE 12). 240V \/ 1-phase. Max 230°F. SGS Listed. Ships on wooden pallet - scheduled delivery. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + ext box + 528 lbs stones\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e15 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e530 to 813 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing - same body as HIVE 12 and 18\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBeehive-inspired open cage design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e528 lb stone capacity - 16 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAir tunnel pre-installed - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box included (X in model name)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local w\/Wood Case or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDual 50A breakers - dual 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eShips on wooden pallet - scheduled delivery\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e15 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal amperage draw\u003c\/td\u003e\n\u003ctd\u003e62.5 A (31.25A per circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breakers required\u003c\/td\u003e\n\u003ctd\u003eTwo separate 50A breakers (no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003eTwo runs of 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e530 to 813 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e528 lbs (16 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 16 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e22\" (560 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5\" (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel open cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing (or bench-embedded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel\u003c\/td\u003e\n\u003ctd\u003ePre-installed - 25% faster heat-up, extended element life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local w\/Wood Case\u003c\/td\u003e\n\u003ctd\u003eDigital control with thermo-ash wood enclosure - on-site\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired and included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE series electrical comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 12kW\u003c\/td\u003e\n\u003ctd\u003e424-636 cu ft | Dual 30A | Dual 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 15kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e530-813 cu ft | Dual 50A | Dual 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 18kW\u003c\/td\u003e\n\u003ctd\u003e636-955 cu ft | Dual 50A | Dual 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all three HIVE models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e528 lbs - identical across all three\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDelivery and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery method\u003c\/td\u003e\n\u003ctd\u003eFreight on wooden pallet - scheduled appointment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eWild beehive - open cage form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE 15kW floor-standing sauna heater - stainless steel open cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control with wood case (Local or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e528 lbs of 2\" - 4\" (5-10 cm) Round Sauna Stones \u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM HIVE safety railing (recommended), reflector panels (allow closer wall installation), HIVE embedding flange (for bench mounting). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE 15STUX Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e15kW for 530-813 cu ft - beyond the HIVE 12 range\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15kW covers rooms that the HIVE 12 cannot - from 530 to 813 cubic feet. For large dedicated sauna buildings, multi-bench sauna rooms, and commercial installations where the 12kW's 636 cu ft ceiling is insufficient, the 15kW is the appropriate next step. The 25% output increase over the 12kW translates directly to faster heat-up times and effective coverage of larger room volumes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame body as HIVE 12 and 18 - no size difference\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15 is physically identical to the HIVE 12 and 18: same 22\" diameter, same 29.5\" height, same open beehive cage, same 528-lb stone capacity, same floor-standing footprint. The output level changes with the number of heating elements inside the cage. The installation footprint and stone loading procedure are the same regardless of which HIVE model is selected.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e528 lbs of stone - massive sustained thermal mass\u003c\/div\u003e\n\u003cp\u003eThe same 528-lb stone load as the HIVE 12 - now driven by 15kW of output. More output heating the same stone mass means faster heat-up to bathing temperature and greater capacity to sustain that temperature through extended sessions and back-to-back use with multiple bathers. The open cage airflow ensures all 528 lbs are heated evenly, producing soft, consistent steam from the full stone volume when water is ladled.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAir tunnel pre-installed - 25% faster, longer element life\u003c\/div\u003e\n\u003cp\u003eThe HIVE air tunnel is pre-installed in every HIVE package. It directs airflow more efficiently through the stone mass during the warm-up cycle, reducing heat-up time by approximately 25% and reducing thermal stress on the heating elements. For a 15kW heater covering rooms up to 813 cu ft, faster heat-up is a meaningful operational benefit - particularly for commercial installations where sauna turnaround time matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDual 50A \/ 8 AWG - plan the electrical carefully\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15 requires two separate 50A breakers and two 8 AWG wire runs - heavier than the HIVE 12's dual 30A \/ 10 AWG. Confirm panel capacity for two 50A slots before ordering. The UKU Extension Box (included) manages the dual-circuit connection to the single UKU control. All wiring must be completed by a licensed electrician. No GFI\/GFCI breakers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a large sauna\u003c\/div\u003e\n\u003cp\u003eA 530-813 cu ft sauna room requires significant warm-up time at 15kW. Upgrading to UKU WiFi at checkout enables remote preheat via the HUUM app - start the sauna from anywhere and arrive to a room already at temperature. For commercial use where sessions are scheduled in advance, the WiFi variant with app scheduling is the operationally practical choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349\u0026amp;width=800\" alt=\"HUUM HIVE 15kW floor-standing sauna heater package with UKU control wood case, extension box, and 528 lbs olivine stones\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE 15STUX. 15kW. 530-813 cu ft. 528 lbs of stone. The complete mid-range HIVE package.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE 15STUX Package steps up from the HIVE 12 with 25% more output in the same body for rooms from 530 to 813 cubic feet. The package includes every required component: the HIVE 15kW heater with pre-installed air tunnel, UKU control with wood case (Local or WiFi at checkout), UKU Extension Box, and 528 lbs of rounded olivine diabase stones in 16 boxes. Delivered on a wooden pallet via scheduled freight. A licensed electrician is required for the dual-circuit 50A \/ 8 AWG installation. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - HIVE 15kW, UKU control w\/wood case, UKU Ext Box, 528 lbs stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e15kW, 530-813 cu ft\u003c\/strong\u003e - dual 50A breakers, dual 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame 528 lb stone capacity\u003c\/strong\u003e as HIVE 12 and 18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAir tunnel pre-installed\u003c\/strong\u003e - 25% faster heat-up, extended element life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePallet delivery, scheduled appointment\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE 12 vs 15 vs 18 - choosing the right output\u003c\/span\u003e\n\u003ch4\u003eWhich HIVE output level is correct - 12kW, 15kW, or 18kW?\u003c\/h4\u003e\n\u003cp\u003eAll three HIVE models share identical body dimensions (22\" diameter, 29.5\"H), stone capacity (528 lbs), and installation method. The selection is based on room size and adjusted cubic footage. HIVE 12kW: 424-636 cu ft, dual 30A \/ 10 AWG. HIVE 15kW: 530-813 cu ft, dual 50A \/ 8 AWG. HIVE 18kW: 636-955 cu ft, dual 50A \/ 8 AWG. The 15 and 18 share the same electrical specification; the difference between them is output and room range. The 15kW overlaps with the 12kW from 530 to 636 cu ft: in this overlap zone, a well-insulated standard room may be adequately served by the 12kW at lower electrical cost, while a room with cold surfaces or high-frequency commercial use would benefit from the 15kW's additional output headroom. For rooms from 637 cu ft and above, the 15kW or 18kW is required. Use the HUUM heater calculator in the Size Your Sauna document below to verify the adjusted cubic footage of the specific sauna room before selecting the output level.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required. No GFI\/GFCI. HIVE safety railing recommended. Reflector panels and embedding flange sold separately. All three HIVE models deliver on wooden pallet with scheduled freight appointment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/ai_heater-package_huum-mobile-app.jpg?v=1778943360\u0026amp;width=800\" alt=\"HUUM HIVE 15kW installed in large commercial sauna showing same beehive cage as 12kW and 18kW models\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna - HUUM Heater Calculator \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE 15STUX Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, incorrect dual-circuit wiring, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to GFI\/GFCI breakers. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52261620744474,"sku":"534-BDL-HIVE15STULBX","price":6203.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52261620777242,"sku":"534-BDL-HIVE15STULB-WDX","price":6516.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52261620842778,"sku":"534-BDL-HIVE15STUWBX","price":6465.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52261620875546,"sku":"534-BDL-HIVE15STUWB-WDX","price":6778.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52261620941082,"sku":"534-BDL-HIVE15STUWGDX","price":6640.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Glass","offer_id":52261620973850,"sku":"534-BDL-HIVE15STUWGX","price":6865.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52261621006618,"sku":"534-BDL-HIVE15STUWMRX","price":7128.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349"},{"product_id":"huum-hive-18stux-pkg-hive-series-18-0kw-sauna-heater-package","title":"HUUM HIVE 18STUX Pkg HIVE Series 18.0kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM HIVE 18STUX Pkg - HIVE Series 18kW Sauna Heater Package - SKU 534-BDL-HIVE18STULBX --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=NnVFjMsN2XUs7mQL\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM HIVE 18STUX Pkg HIVE Series 18.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- SKU: 534-BDL-HIVE18STULBX | HIVE Electric Series Package | 636-989 cu ft | Electric --\u003e\u003c!-- Model: HIVE 18STUX PKG | 18kW | Floor-mounted cylindrical beehive-inspired design --\u003e\u003c!-- HIVE = completely different from CLIFF\/STEEL\/DROP: cylindrical beehive-inspired floor heater --\u003e\u003c!-- Pre-installed HIVE Air Tunnel (25% faster heat-up, extends element life, fewer stones needed) --\u003e\u003c!-- Largest package in the HUUM electric lineup - 636-989 cu ft room range --\u003e\u003c!-- Stone-primary philosophy - minimal metal, heat from stones --\u003e\u003c!-- 240V\/1PH | Dual 50A circuit breakers | Dual 8AWG wires --\u003e\u003c!-- Warranty: 3-Year Limited Residential + 1-Year Limited Commercial (Excluding Elements) --\u003e\u003c!-- SGS certified | Designed and made in Estonia by HUUM --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- Documents: HIVE IOM | HIVE Elements Required | UKU IOM | UKU Installation Diagram | --\u003e\u003c!--   UKU Installation Video | Warranty | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .hx { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  .hx-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .hx-feat-grid { grid-template-columns: 1fr 1fr; }\n    .hx-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .hx-brand1, .hx-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .hx-brand2 { display: flex; flex-direction: column-reverse; }\n    .hx-brand1 h4, .hx-brand2 h4 { font-size: 18px !important; }\n    .hx-inc-grid { grid-template-columns: 1fr; }\n  }\n  @media (max-width: 480px) {\n    .hx { padding: 0; }\n    .hx-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .hx-feat { padding: 0.8rem 0.9rem; }\n    .hx-spec-grid { gap: 1.25rem; }\n    .hx-spec-table, .hx-spec-table tbody, .hx-spec-table tr, .hx-spec-table td { display: block; width: 100%; }\n    .hx-spec-table { border: none; }\n    .hx-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .hx-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .hx-spec-table td { border: none; padding: 1px 0; }\n    .hx-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .hx-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .hx-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hx\"\u003e\n\u003cdiv class=\"hx-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE 18STUX Package is the complete ready-to-operate bundle for the 18kW HIVE electric sauna heater - HUUM's largest and most powerful electric heater package, designed for sauna rooms from 636 to 989 cubic feet. The HIVE is an entirely different platform from the CLIFF, STEEL, and DROP: where those are slim pillar or hemispherical heaters, the HIVE is a large cylindrical floor-standing heater inspired by the organic form of a wild beehive, with stainless steel arcs surrounding a massive column of exposed sauna stones. The package includes the HIVE 18kW heater with pre-installed HIVE Air Tunnel and adjustable legs, a full UKU Control set (Black Control Console, Main Control Module, Temperature Sensor, Door Sensor, and all three sensor cables), UKU Extension Box, and 528 lbs of 2\"-4\" (5-10 cm) round sauna stones (Stones 24 - 16 boxes x 33 lbs). The LBX suffix in the SKU identifies the specific configuration: Local controller (Black Control Console) plus Extension Box. At 18kW, the HIVE is in a different class from all other HUUM electric packages in this catalog - it requires dual 50A circuit breakers and dual 8AWG wires, serves rooms up to 989 cu ft, and carries a 3-Year Limited Residential and 1-Year Limited Commercial warranty (excluding elements). SGS certified. Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eThe HIVE platform - cylindrical beehive-inspired floor heater for large saunas\u003c\/h4\u003e\n\u003cp\u003eHUUM's own description of the HIVE is direct and distinctive: the round form of the HIVE sauna heater imitates a wild beehive. Stainless steel arcs surround the sauna stones with pure elegance and accentuate their natural beauty. Where the CLIFF is a slim rectangular open-cage floor pillar and the STEEL is an enclosed square pillar, the HIVE is a large-diameter cylindrical heater whose form is defined by the exposed stone mass it carries. HUUM's description of the result: the HIVE sauna heater represents the copious warmth of a Nordic sauna that unites people. It is the heart and focal point of the sauna. The round shape allows it to be placed in the centre of the room, making it ideal for groups and families. The HIVE's beehive-inspired design won the Red Dot Design Award alongside the CLIFF and DROP - all three HUUM Red Dot laureates. At 18kW and 528 lbs of stones, the HIVE 18 is built for health clubs, spas, gyms, luxury homes with large sauna rooms, and any installation where a conventional wall-mounted or slim floor heater is simply not in the right output class.\u003c\/p\u003e\n\u003ch4\u003ePre-installed HIVE Air Tunnel - 25% faster heat-up, fewer stones needed\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Air Tunnel is a stainless steel component installed in the centre of the HIVE heater that channels air through the stone mass in a controlled pattern. HUUM's description of its three benefits: it speeds up sauna heating by 25%, extends the lifespan of heating elements, and reduces the number of stone boxes needed to fill the heater. Starting from 2025, the Air Tunnel is included as a standard pre-installed component with all HIVE models. The pre-installed Air Tunnel in this package is what allows the HIVE 18 to operate efficiently with 528 lbs (16 boxes) of stones - without the tunnel, the stone requirement would be higher. The tunnel distributes heat from the elements evenly through the full stone column, reducing hot spots at element surfaces and extending element life - a meaningful durability benefit for a heater intended for commercial and high-use residential environments.\u003c\/p\u003e\n\u003ch4\u003eComplete electrical package - dual 50A circuits, full UKU control system\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 18kW has the largest electrical requirement of any HUUM heater: dual 50A circuit breakers and dual 8AWG wires - a significant step up from the single-circuit 30A or 40A requirements of the CLIFF and DROP packages. The full UKU Control set included in this package covers every wiring component: Black Control Console (the physical wall panel), Main Control Module (the heater-side control unit), Temperature Sensor, Door Sensor, Control Display Panel Cable, Temperature Sensor Cable, and Door Sensor Cable. The UKU Extension Box (required for all HUUM heaters at this power level) is also included. A licensed electrician is required for the dual-circuit installation. Buyers who prefer Wi-Fi and smartphone app control can separately purchase the UKU Wi-Fi controller as an upgrade to the included Black Control Console.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-hook\"\u003e18kW electric sauna heater package for rooms from 636 to 989 cubic feet. HUUM's largest electric heater package. HIVE 18STUX Pkg - complete package: HIVE 18kW heater with pre-installed Air Tunnel and adjustable legs, full UKU Control set (Black Control Console, Main Control Module, Temperature Sensor, Door Sensor, and all cables), UKU Extension Box, and 528 lbs round sauna stones (16 boxes, 2\"-4\" \/ 5-10 cm). Cylindrical beehive-inspired floor-standing design - Red Dot Design Award. Stone-primary philosophy - 528 lbs in an exposed stainless steel arc cage. Air Tunnel pre-installed: 25% faster heat-up, extends element life, fewer stones needed. 240V\/1PH - Dual 50A circuit breakers - Dual 8AWG wires. Max 230°F. 3-Year Limited Residential warranty + 1-Year Limited Commercial warranty (excluding elements). Pallet delivery - scheduled freight required. SGS certified. Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"hx-badges\"\u003e\n\u003cspan class=\"hx-badge\"\u003e18 kW\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003e636 to 989 cu ft\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eHUUM's largest electric heater package\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eComplete package - heater, full UKU control set, Extension Box, 528 lbs stones\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eHIVE - cylindrical beehive form - Red Dot Design Award\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003e528 lbs stones included (16 boxes, 2\"-4\" \/ 5-10 cm round)\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003ePre-installed HIVE Air Tunnel - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eAir Tunnel extends element life and reduces stone need\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eUKU Black Control Console included\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eUKU Extension Box included (required for 18kW)\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eFull UKU sensor and cable set included\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003e240V\/1PH - Dual 50A breakers - Dual 8AWG\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eMax 230°F\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003e3-Year Residential + 1-Year Commercial warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"hx-badge\"\u003eSGS certified - designed and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"hx-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"hx-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e636 to 989 cu ft (adjusted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity (included)\u003c\/td\u003e\n\u003ctd\u003e528 lbs \/ 240 kg (16 boxes, 2\"-4\" \/ 5-10 cm round)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\"-4\" \/ 5-10 cm rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eDirect - stones in contact with heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat philosophy\u003c\/td\u003e\n\u003ctd\u003eStone-primary - minimal metal, heat from stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003eHIVE Air Tunnel (pre-installed)\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003ctd\u003eYes - pre-installed as standard from 2025\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePosition\u003c\/td\u003e\n\u003ctd\u003eInstalled in centre of heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBenefit 1\u003c\/td\u003e\n\u003ctd\u003eSpeeds up sauna heating by 25%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBenefit 2\u003c\/td\u003e\n\u003ctd\u003eExtends lifespan of heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBenefit 3\u003c\/td\u003e\n\u003ctd\u003eRequires approximately 2 fewer stone boxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003eHIVE design\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eCylindrical - inspired by wild beehive form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePlacement\u003c\/td\u003e\n\u003ctd\u003eFloor-standing - can be placed in centre of room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone display\u003c\/td\u003e\n\u003ctd\u003eOpen stainless steel arc cage - full stone column visible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Design Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLegs\u003c\/td\u003e\n\u003ctd\u003eAdjustable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE vs CLIFF vs STEEL\u003c\/td\u003e\n\u003ctd\u003eHIVE: cylindrical large floor heater | CLIFF\/STEEL: slim pillar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003eElectrical (18kW - dual circuit)\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breakers\u003c\/td\u003e\n\u003ctd\u003eDual 50A dedicated circuits\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003eDual 8AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote vs CLIFF packages\u003c\/td\u003e\n\u003ctd\u003eCLIFF: single 30A\/10AWG | HIVE 18: dual 50A\/8AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired and included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003eUKU Control set (included - full set)\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Console\u003c\/td\u003e\n\u003ctd\u003eBlack Control Console (UKU Local physical panel)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMain Control Module\u003c\/td\u003e\n\u003ctd\u003eIncluded - heater-side control unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Sensor\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor Sensor\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Display Panel Cable\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Sensor Cable\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor Sensor Cable\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi upgrade\u003c\/td\u003e\n\u003ctd\u003eUKU Wi-Fi controller available separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003eWarranty and certifications\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResidential warranty\u003c\/td\u003e\n\u003ctd\u003e3-Year Limited (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommercial warranty\u003c\/td\u003e\n\u003ctd\u003e1-Year Limited (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"hx-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eHIVE safety railing (wood arcs, stainless steel supports)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eHIVE embedding flange\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi controller upgrade\u003c\/td\u003e\n\u003ctd\u003eUKU Wi-Fi controller (replaces included Black Console)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hx-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"hx-manual\" style=\"margin-bottom: 0;\"\u003e\n\u003cdiv class=\"hx-inc-section\"\u003e\n\u003ch6\u003eHIVE 18.0kW Sauna Heater\u003c\/h6\u003e\n\u003cdiv class=\"hx-inc-grid\"\u003e\n\u003cdiv class=\"hx-inc-item\"\u003e18.0kW Sauna Heater\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eAdjustable Legs\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003ePre-Installed HIVE Air Tunnel\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eInstallation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003e3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty (Excluding Elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-section\"\u003e\n\u003ch6\u003eUKU Control\u003c\/h6\u003e\n\u003cdiv class=\"hx-inc-grid\"\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eBlack Control Console\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eMain Control Module\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eTemperature Sensor\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eDoor Sensor\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eControl Display Panel Cable\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eTemperature Sensor Cable\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eDoor Sensor Cable\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eInstallation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003e3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-section\"\u003e\n\u003ch6\u003eUKU Extension Box\u003c\/h6\u003e\n\u003cdiv class=\"hx-inc-grid\"\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eExtension Box\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003eInstallation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-item\"\u003e3-Year Limited Residential Warranty and 1-Year Limited Commercial Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-inc-section\"\u003e\n\u003ch6\u003eStones 24\u003c\/h6\u003e\n\u003cdiv class=\"hx-inc-grid\"\u003e\n\u003cdiv class=\"hx-inc-item\"\u003e528 lbs of 2\" - 4\" (5-10 cm) Round Sauna Stones\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e Licensed electrician for dual-circuit wiring (240V\/1PH, dual 50A circuit breakers, dual 8AWG wires). An additional box of stones is recommended. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HIVE safety railing (light wood arcs and stainless steel supports); HIVE embedding flange (bench integration); UKU Wi-Fi controller (upgrade from included Black Console). This package ships by scheduled pallet freight - a delivery appointment is required.\u003c\/p\u003e\n\u003chr class=\"hx-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE 18STUX Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"hx-feat-grid\"\u003e\n\u003cdiv class=\"hx-feat\"\u003e\n\u003cdiv class=\"hx-feat-title\"\u003e18kW and 636-989 cu ft - for rooms beyond the CLIFF's range\u003c\/div\u003e\n\u003cp\u003eThe HIVE 18kW covers sauna rooms from 636 to 989 cubic feet - the range where all CLIFF and DROP packages end. The CLIFF 10.5kW tops out at 600 cu ft. The HIVE 18 begins where the rest of HUUM's package lineup ends. For a large residential sauna, a health club sauna, a gym sauna, or a spa installation where 10.5kW would be undersized for the room, the HIVE 18STUX Package is the purpose-built complete system. HUUM's own description of its intended environment: an elegant solution for bigger saunas, ideal for spas and gyms. The cylindrical form that can be placed in the centre of the room makes it ideal for large group sessions and commercial installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-feat\"\u003e\n\u003cdiv class=\"hx-feat-title\"\u003e528 lbs of stones - more than most wood-burning stoves\u003c\/div\u003e\n\u003cp\u003eAt 528 lbs (16 boxes, 5-10 cm round), the HIVE 18kW holds a stone mass that exceeds most wood-burning sauna stoves. HUUM's description of the outcome: the massive stone amount ensures a long-lasting hot steam even for larger groups, without compromising on design. HUUM applies the same stone-primary philosophy to the HIVE that runs through all their heaters: the amount of metal used is very small so that the majority of the heat derives from the stones, not the metal. This maximises the proportion of beneficial negative ions in the air, consistent with the traditional wood-heated sauna. The cylindrical cage of stainless steel arcs exposes the full 528-lb stone column to the sauna air and to every ladle of water poured.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-feat\"\u003e\n\u003cdiv class=\"hx-feat-title\"\u003ePre-installed Air Tunnel - three confirmed benefits\u003c\/div\u003e\n\u003cp\u003eThe HIVE Air Tunnel is a stainless steel component installed in the centre of the heater that channels air through the stone mass. HUUM identifies three specific benefits: it speeds up sauna heating by 25%, extends the lifespan of heating elements, and reduces the number of stone boxes needed. Starting from 2025, the Air Tunnel comes pre-installed with all HIVE models - this package includes a heater with the tunnel already in place, confirmed in the product's includes list as \"Pre-Installed HIVE Air Tunnel.\" For an 18kW heater in a large commercial or residential room, the 25% faster heat-up translates directly to a shorter wait from switch-on to bathing temperature and lower operating energy cost per session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-feat\"\u003e\n\u003cdiv class=\"hx-feat-title\"\u003eFull UKU control set - every component included\u003c\/div\u003e\n\u003cp\u003eThis package includes the complete UKU Control system: Black Control Console (physical wall panel), Main Control Module (the heater-side unit that bridges the control console and heating elements), Temperature Sensor, Door Sensor, and all three cables (Control Display Panel Cable, Temperature Sensor Cable, Door Sensor Cable). This is a more complete control component set than the CLIFF packages, which include only the console and Extension Box. The HIVE's Main Control Module and separate sensor components are all pre-specified and included, eliminating the need to source any control wiring separately. The UKU Wi-Fi controller is available as a separate upgrade for buyers who want HUUM app-based remote heating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-feat\"\u003e\n\u003cdiv class=\"hx-feat-title\"\u003e3-Year Residential + 1-Year Commercial warranty\u003c\/div\u003e\n\u003cp\u003eThe HIVE 18STUX Package carries a 3-Year Limited Residential warranty and a separately stated 1-Year Limited Commercial warranty (both excluding elements). This dual residential\/commercial warranty structure reflects the HIVE's intended use across both high-end residential and commercial settings. The 3-year residential term is longer than the warranty on CLIFF and DROP packages. The separate commercial warranty confirms the HIVE 18 is formally rated and warranted for commercial use - health clubs, spas, gyms, hotels - not just residential installation. Both terms are provided per the warranty documents included with each package component.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-feat\"\u003e\n\u003cdiv class=\"hx-feat-title\"\u003eHIVE Series - 12kW and 18kW configurations at BathingBrands\u003c\/div\u003e\n\u003cp\u003eThe 534-BDL-HIVE18STULBX is the 18kW package for the HUUM HIVE platform. The HIVE Series also includes the HIVE 12 (12kW, 424-636 cu ft, smaller stone capacity than the 18) available as a heater-only listing. The HIVE is HUUM's only cylindrical large-diameter floor heater platform - it is distinct in form, scale, stone capacity, electrical requirement, and intended room size from all other HUUM electric heaters. Optional HIVE-specific accessories (sold separately) include the HIVE safety railing (light-colored wooden arcs with stainless steel supports) and the HIVE embedding flange for partial bench integration. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hx-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"hx-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE 18STUX Package 534-BDL-HIVE18STULBX 18kW electric sauna heater 636-989 cu ft 528 lbs stones cylindrical beehive design pre-installed air tunnel\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349\u0026amp;width=800\" class=\"hx-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hx-brand-tag\"\u003eDesigned in Estonia - SGS Certified - HIVE Series - Red Dot Award - Complete Package\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE 18STUX Pkg. 18kW. 636-989 cu ft. 528 lbs stones. Pre-installed Air Tunnel. Full UKU set.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE 18STUX Package is the complete bundle for the 18kW HIVE cylindrical floor heater - the largest electric package in the HUUM lineup. Includes HIVE 18kW heater with pre-installed Air Tunnel, full UKU Control set (Black Console, Main Module, Temperature Sensor, Door Sensor, all cables), UKU Extension Box, and 528 lbs of round sauna stones (16 boxes). Dual 50A \/ dual 8AWG electrical required. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"hx-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e18kW electric\u003c\/strong\u003e - 636-989 cu ft - HIVE cylindrical beehive design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e528 lbs stones included (16 boxes)\u003c\/strong\u003e - more than most wood-burning stoves\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-installed Air Tunnel\u003c\/strong\u003e - 25% faster heat-up - extends element life\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFull UKU Control set + Extension Box included\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDual 50A \/ dual 8AWG - 3-Year Residential + 1-Year Commercial warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"hx-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hx-brand-tag\"\u003eHIVE 18STUX Pkg vs CLIFF 11STU Pkg vs DROP 7STU Pkg - HUUM complete package comparison\u003c\/span\u003e\n\u003ch4\u003eHIVE 18STUX vs CLIFF 11STU vs DROP 7STU - scale, form, and room size\u003c\/h4\u003e\n\u003cp\u003eThree HUUM complete electric packages span the full range from medium to very large sauna rooms. DROP 7STU Pkg (534-BDL-DROP75STULB): 7.5kW, 248-389 cu ft, wall-mounted hemispheric water-drop form, 121 lbs stones (4 boxes, 5-10 cm), single 40A\/8AWG, no Extension Box. Right for medium home saunas in the wall-mounted form. CLIFF 11STU Pkg (534-BDL-CLIFF105STULBX): 10.5kW, 353-600 cu ft, floor-standing slim open-cage pillar, 165 lbs stones (5 boxes, 3-5 cm), single 30A\/10AWG, Extension Box included. Right for larger rooms up to 600 cu ft in the CLIFF platform. HIVE 18STUX Pkg 534-BDL-HIVE18STULBX (this listing): 18kW, 636-989 cu ft, large cylindrical beehive floor heater, 528 lbs stones (16 boxes, 5-10 cm round), dual 50A \/ dual 8AWG, full UKU Control set + Extension Box, 3-Year Residential + 1-Year Commercial warranty. Right for rooms from 636-989 cu ft where no CLIFF or DROP configuration is adequately sized and the HIVE's cylindrical stone-column presence and commercial-grade specification are the right fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE 18STUX 18kW large cylindrical vs CLIFF 11STU 10.5kW slim pillar vs DROP 7STU 7.5kW wall-mounted comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/ai_heater-package_huum-mobile-app.jpg?v=1778943360\u0026amp;width=800\" class=\"hx-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"hx-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"hx-manual\"\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eHIVE Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eHIVE Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Video\u003c\/h6\u003e\n\u003ca href=\"https:\/\/www.bathingbrands.com\/54746\/huum\/hive-18stux-pkg\/sauna-heater-kits\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Video \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hx-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"hx-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"hx-warranty\"\u003e\n\u003ch5\u003e3-Year Limited Residential and 1-Year Limited Commercial warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE 18kW heater carries a \u003cstrong\u003e3-Year Limited Residential warranty\u003c\/strong\u003e and a \u003cstrong\u003e1-Year Limited Commercial warranty\u003c\/strong\u003e from the date of purchase, with heating elements excluded from both terms. The UKU Control set (Black Control Console, Main Control Module, sensors, and cables) and UKU Extension Box each carry their own 3-Year Limited Residential and 1-Year Limited Commercial warranty per their respective installation manuals. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of incorrect stone type or size (decorative stones must not be used; use only rounded olivine 5-10 cm), operating without the required stone load, or damage from inadequate electrical installation (dual 50A circuits, dual 8AWG wires required). A licensed electrician is required for all wiring. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52263321895194,"sku":"534-BDL-HIVE18STULBX","price":6471.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52263321927962,"sku":"534-BDL-HIVE18STULB-WDX","price":6784.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52263321993498,"sku":"534-BDL-HIVE18STUWBX","price":6733.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52263322026266,"sku":"534-BDL-HIVE18STUWB-WDX","price":7046.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52263322091802,"sku":"534-BDL-HIVE18STUWGDX","price":6908.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52263322124570,"sku":"534-BDL-HIVE18STUWGX","price":7133.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52263322157338,"sku":"534-BDL-HIVE18STUWMRX","price":7396.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349"},{"product_id":"huum-hive-mini-6stu-pkg-hive-mini-series-6-0kw-sauna-heater-package","title":"HUUM HIVE Mini 6STU Pkg HIVE Mini Series 6.0kW Sauna Heater Package","description":"\u003c!-- HUUM HIVE Mini 6STU Package - 6kW Complete Floor-Standing Sauna Heater Package --\u003e\u003c!-- Floor-standing | 240V\/1PH | 177-318 cu ft | Complete - control + 330 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-HIVEM6STULB | HIVE Mini Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- No UKU Extension Box required (6kW under 11kW threshold) | Air tunnel pre-installed --\u003e\u003c!-- Single 30A breaker \/ 10 AWG | Pallet delivery | 5-year warranty (elements excluded) --\u003e\u003c!-- 8 document sections: HIVE IOM | HIVE Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=Im7Mm6Gsc7dIJL3X\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM HIVE Mini 6STU Pkg HIVE Mini Series 6.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE Mini 6STU Package is a complete sauna heater package for rooms from 177 to 318 cubic feet, including the HIVE Mini 6kW floor-standing heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 330 lbs of rounded olivine diabase sauna stones (10 boxes). The HIVE Mini is a slimmer version of the full-size HIVE heater - designed for smaller sauna rooms where the full HIVE's 22\" diameter is too large, the DROP series's 122-lb wall-mounted format is insufficient, and the floor-standing beehive aesthetic of the HIVE family is the preferred design. At 18.11\" (460mm) diameter and 29.5\" height, the HIVE Mini is meaningfully more compact than the full HIVE while still carrying 330 lbs of stone - nearly three times the DROP series's capacity. No UKU Extension Box is required for the 6kW model.\u003c\/p\u003e\n\u003ch4\u003eHIVE Mini - the slimmer HIVE for smaller rooms with floor-standing aesthetics\u003c\/h4\u003e\n\u003cp\u003eThe HUUM HIVE series divides into two distinct product lines based on room size and heater scale. The full HIVE (12kW, 15kW, 18kW) has a 22\" diameter cage and covers rooms from 424 to 955+ cubic feet - a large, commanding floor-standing heater suited to large residential and commercial sauna rooms. The HIVE Mini (6kW, 9kW, 10.5kW) has an 18.11\" (460mm) diameter cage and covers rooms from 177 to 706 cubic feet depending on output - a slimmer floor-standing heater that brings the beehive open-cage design and large stone capacity of the full HIVE into rooms where the full HIVE would be oversized. The HIVE Mini 6kW with 330 lbs of stones in a 177-318 cu ft room is the specific case where a bather wants more stone mass than the wall-mounted DROP can provide, in a compact floor-standing format, without the electrical complexity of the full HIVE's dual-circuit requirement.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stone from a floor-standing heater on a standard 30A circuit\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini 6 carries 330 lbs (10 boxes) of rounded olivine diabase stones on a standard single 30A \/ 10 AWG circuit - the same electrical specification as the wall-mounted HUUM DROP 6kW. The critical difference is stone mass: the DROP 6 carries 122 lbs; the HIVE Mini 6 carries 330 lbs. More stone mass means more thermal capacity, slower steam release, longer sustained heat after the elements have cycled, and softer, longer-lasting loyly when water is ladled. For buyers in the 177-318 cu ft room range who want more stone mass than the DROP provides and prefer a floor-standing installation over a wall-mounted one, the HIVE Mini 6 is the appropriate choice - at the same electrical requirement as the DROP 6.\u003c\/p\u003e\n\u003ch4\u003eAir tunnel pre-installed, adjustable legs, bench-embedding possible\u003c\/h4\u003e\n\u003cp\u003eThe air tunnel is pre-installed in this package as standard. It directs airflow more efficiently through the 330-lb stone mass during the warm-up cycle, speeding up heating and extending element life. The HIVE Mini has adjustable legs for levelling on uneven sauna floors. Like the full HIVE, the HIVE Mini can also be partially embedded into a sauna bench using the HIVE Mini embedding flange (sold separately), allowing the heater to sit flush with the bench level in custom sauna installations. The HIVE Mini stands directly on the sauna floor without any wall mounting hardware. The optional HIVE Mini safety railing is recommended to prevent accidental contact with the hot heater surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 6kW floor-standing sauna heater package for rooms from 177 to 318 cubic feet. Includes HIVE Mini 6kW heater, UKU control (Local Black or WiFi - select at checkout), and 330 lbs of rounded olivine diabase stones (10 boxes). The slimmer HIVE for smaller rooms - 18.11\" diameter x 29.5\"H. 330 lbs stone capacity - nearly 3x the DROP series wall-mounted heater. Open beehive cage design - direct stone-to-element contact, maximum airflow. Air tunnel pre-installed - faster heat-up, extended element life. Adjustable legs. Bench-embedding possible. Single 30A breaker, 10 AWG wire - same electrical as DROP 6kW. No UKU Extension Box required. 240V \/ 1-phase. Max 230°F. SGS Listed. Ships on wooden pallet - scheduled delivery. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 330 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 318 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing - HIVE beehive design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlimmer HIVE - 18.11\" diameter\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity - 10 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNearly 3x the DROP series stone mass\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAir tunnel pre-installed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 30A breaker - 10 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eShips on wooden pallet - scheduled delivery\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 30A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 10 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5\" (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e30.9 lbs (14 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel open cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel\u003c\/td\u003e\n\u003ctd\u003ePre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE Mini vs DROP 6 comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW (this listing)\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | 330 lbs stones | 18.11\" diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6kW\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | 122 lbs stones | 15.4\"W x 13.2\"D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom coverage\u003c\/td\u003e\n\u003ctd\u003eBoth: 177-318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical\u003c\/td\u003e\n\u003ctd\u003eBoth: single 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone mass difference\u003c\/td\u003e\n\u003ctd\u003eHIVE Mini carries 2.7x more stone mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE Mini series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 330 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 330 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.5kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 330 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all three HIVE Mini models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE Mini 6kW floor-standing sauna heater - stainless steel open cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e330 lbs of 2\" - 4\" (5-10 cm) Round Sauna Stones\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAir tunnel (pre-installed on heater)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM HIVE Mini safety railing (recommended), HIVE Mini embedding flange (for bench mounting). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Mini 6STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs of stone on a standard 30A circuit\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 6 carries 330 lbs of rounded olivine diabase stones - nearly three times the 122 lbs of the DROP 6kW - on the same standard single 30A \/ 10 AWG circuit. More thermal mass means slower, softer steam, more sustained heat through the session, and a more authentic sauna experience than a smaller stone load can deliver at the same output level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSlimmer HIVE beehive design for smaller rooms\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini's 18.11\" diameter is meaningfully more compact than the full HIVE's 22\", making the beehive open-cage design accessible for rooms from 177 cu ft where the full HIVE would be oversized. The stainless steel arcs surround the stone mass with the same open-cage airflow geometry as the full HIVE, delivering even heat distribution through the full 330-lb stone load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eFloor-standing - no wall mounting required\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini stands directly on the sauna floor on adjustable legs. No wall bracket, no wall penetration, no overhead clearance concerns from a wall-mounted unit. Adjustable legs allow levelling on uneven sauna floors. The heater can be partially embedded into the sauna bench using the optional embedding flange for a custom flush installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAir tunnel pre-installed - faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe air tunnel is included as standard in all current HIVE Mini models and is pre-installed on the heater. It directs airflow more efficiently through the 330-lb stone mass during warm-up, reducing heat-up time and extending heating element life. For a 177-318 cu ft room, faster heat-up means a shorter wait from switch-on to bathing temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi option - remote preheat\u003c\/div\u003e\n\u003cp\u003eUpgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android - remote preheat, session scheduling, and temperature monitoring from anywhere. No UKU Extension Box is required for the 6kW model. The WiFi option connects directly to the UKU control without additional hardware. Start the sauna from the app before leaving and arrive to a hot room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eHIVE Mini vs DROP - choosing between them\u003c\/div\u003e\n\u003cp\u003eBoth cover 177-318 cu ft on a 30A \/ 10 AWG circuit. The DROP 6 is wall-mounted, compact, 122 lbs of stones. The HIVE Mini 6 is floor-standing, 18.11\" diameter, 330 lbs of stones. The decision is mounting preference and stone mass priority. For wall-mounted minimalism: DROP 6. For floor-standing beehive aesthetics and maximum stone mass on the same circuit: HIVE Mini 6.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-mini-sauna-heater-package.jpg?v=1778946105\u0026amp;width=800\" alt=\"HUUM HIVE Mini 6kW floor-standing sauna heater package with UKU control and 330 lbs olivine stones\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Mini 6STU. 6kW. 177-318 cu ft. The slimmer HIVE - floor-standing, 330 lbs of stone, standard 30A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Mini 6STU Package brings the beehive open-cage design and large stone mass of the HIVE family into smaller sauna rooms on a standard 30A residential electrical circuit. At 330 lbs of stone capacity in an 18.11\" diameter floor-standing form, the HIVE Mini 6 sits between the wall-mounted DROP series (122 lbs) and the full HIVE series (528 lbs) in both scale and stone mass - the appropriate choice for buyers who want a floor-standing heater with more thermal mass than the DROP provides, without the dual-circuit electrical requirement of the full HIVE. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - HIVE Mini 6kW, UKU control, and 330 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW, 177-318 cu ft\u003c\/strong\u003e - single 30A \/ 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e330 lb stone capacity\u003c\/strong\u003e - 2.7x more than DROP 6kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlimmer HIVE\u003c\/strong\u003e - 18.11\" diameter, floor-standing, adjustable legs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE Mini series - 6kW, 9kW, 10.5kW\u003c\/span\u003e\n\u003ch4\u003eHIVE Mini 6 vs 9 vs 10.5 - choosing the right output for the room\u003c\/h4\u003e\n\u003cp\u003eAll three HIVE Mini models share identical body dimensions - 18.11\" (460mm) diameter, 29.5\" height - and the same 330-lb stone capacity. The selection is based on room size and adjusted cubic footage. HIVE Mini 6kW: 177-318 cu ft, single 30A \/ 10 AWG. HIVE Mini 9kW: 318-530 cu ft, single 50A \/ 8 AWG. HIVE Mini 10.5kW: 353-706 cu ft, single 50A \/ 8 AWG. The 6kW is the only HIVE Mini model that operates on a standard 30A circuit - the 9 and 10.5kW require a 50A circuit and 8 AWG wire. For rooms from 177-318 cu ft where a 30A circuit is available, the HIVE Mini 6 is the correct and most electrically efficient choice. Use the HUUM heater calculator in the Size Your Sauna document below to verify the adjusted cubic footage of the specific sauna room before selecting.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required for all electrical connections. No GFI\/GFCI breakers. The HIVE Mini safety railing is recommended for all HIVE Mini installations. Pallet delivery requires a scheduled appointment. An embedding flange is available separately for bench installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-mini-sauna-heater-with-air-tunnel_76cf8913-abf7-4de7-9ebe-e5966acd9254.jpg?v=1778946143\u0026amp;width=800\" alt=\"HUUM HIVE Mini series comparison showing 6kW 9kW 10.5kW identical body with different output specifications\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Mini 6STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52264772075802,"sku":"534-BDL-HIVEM6STULB","price":4364.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52264772108570,"sku":"534-BDL-HIVEM6STULB+WD","price":4469.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52264772141338,"sku":"534-BDL-HIVEM6STULB+WH","price":4380.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52264786821402,"sku":"534-BDL-HIVEM6STUWB","price":4626.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52264786854170,"sku":"534-BDL-HIVEM6STUWB+WD","price":4887.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52264786886938,"sku":"534-BDL-HIVEM6STUWB+WH","price":4798.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52264786919706,"sku":"534-BDL-HIVEM6STUWGD","price":5549.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52264786952474,"sku":"534-BDL-HIVEM6STUWG","price":5026.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52264786985242,"sku":"534-BDL-HIVEM6STUWB+MR","price":5549.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-mini-sauna-heater-package.jpg?v=1778946105"},{"product_id":"huum-hive-mini-9stu-pkg-hive-mini-series-9-0kw-sauna-heater-package","title":"HUUM HIVE Mini 9STU Pkg HIVE Mini Series 9.0kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM HIVE 15STUX Package - 15kW Complete Floor-Standing Sauna Heater Package --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=9hVCzk4uAZFoVeGI\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003c!-- HUUM HIVE Mini 9STU Package - 9kW Complete Floor-Standing Sauna Heater Package --\u003e\u003c!-- Floor-standing | 240V\/1PH | 318-530 cu ft | Complete - control + 330 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-HIVEM9STULB | HIVE Mini Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- No UKU Extension Box required (9kW under 11kW threshold) | Air tunnel pre-installed --\u003e\u003c!-- Single 50A breaker \/ 8 AWG (heavier than HIVE Mini 6's 30A \/ 10 AWG) --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia | Pallet delivery --\u003e\n\u003ch2\u003eHUUM HIVE Mini 9STU Pkg HIVE Mini Series 9.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- 8 document sections: HIVE IOM | HIVE Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE Mini 9STU Package is a complete sauna heater package for rooms from 318 to 530 cubic feet, including the HIVE Mini 9kW floor-standing heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 330 lbs of rounded olivine diabase sauna stones (10 boxes). The HIVE Mini 9 steps up from the HIVE Mini 6 with 50% more output for the same physical body and the same 330-lb stone capacity, extending the room range into the 318-530 cu ft territory that the 6kW cannot serve. The key electrical difference from the HIVE Mini 6: the 9kW requires a single 50A breaker and 8 AWG wire rather than the 6kW's 30A \/ 10 AWG - a heavier but still single-circuit specification with no UKU Extension Box required.\u003c\/p\u003e\n\u003ch4\u003eHIVE Mini 9 vs HIVE Mini 6 - more output, heavier circuit, same body\u003c\/h4\u003e\n\u003cp\u003eAll three HIVE Mini models - 6kW, 9kW, and 10.5kW - share identical external body dimensions: 18.11\" (460mm) diameter, 29.5\" (750mm) height. The physical footprint in the sauna room, the 330-lb stone capacity, the pre-installed air tunnel, and the floor-standing installation method are the same across all three. What changes is the output level and the electrical requirement. The HIVE Mini 6 runs on a single 30A \/ 10 AWG circuit. The HIVE Mini 9 and 10.5 both require a single 50A \/ 8 AWG circuit. For rooms from 318 to 530 cubic feet where the HIVE Mini 6's 318 cu ft ceiling is insufficient, the HIVE Mini 9 is the correct step up - provided the electrical panel can supply a single 50A double-pole breaker slot and the electrician can run 8 AWG wire to the UKU control location.\u003c\/p\u003e\n\u003ch4\u003e318-530 cu ft - mid-size residential saunas and sauna cabins\u003c\/h4\u003e\n\u003cp\u003eThe 9kW range of 318-530 cubic feet covers mid-size dedicated home sauna rooms, two-bench sauna cabins, and smaller commercial installations. At this range, the sauna room is typically a purpose-built space rather than a converted interior room. Rooms approaching 530 cubic feet with cold surfaces - glass walls, tile floors, or natural stone panels - require calculating the adjusted cubic footage to confirm whether the HIVE Mini 9 or the HIVE Mini 10.5kW is the correct model. Use the HUUM heater calculator in the Size Your Sauna document below to verify before selecting. The HIVE Mini 9 and HIVE Mini 10.5 share the same 50A \/ 8 AWG electrical requirement, so the output choice between them does not affect the electrical installation.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stone, air tunnel pre-installed - same as HIVE Mini 6\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini 9 carries the same 330-lb stone capacity as the HIVE Mini 6 in the same 18.11\" diameter open beehive cage. The air tunnel is pre-installed on the heater as standard. It directs airflow more efficiently through the stone mass during warm-up, speeding up heating by approximately 25% and extending heating element life. The 10 boxes of rounded olivine diabase stones (2\"-4\", 5-10 cm) included in this package are the correct type and quantity for the HIVE Mini 9. This package ships on a wooden pallet by freight and requires a scheduled delivery appointment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 9kW floor-standing sauna heater package for rooms from 318 to 530 cubic feet. Includes HIVE Mini 9kW heater, UKU control (Local Black or WiFi - select at checkout), and 330 lbs of rounded olivine diabase stones (10 boxes). Same 18.11\" diameter beehive cage as HIVE Mini 6 and 10.5 - 330 lbs stone capacity across all three. Air tunnel pre-installed - faster heat-up, extended element life. No UKU Extension Box required. Single 50A breaker, 8 AWG wire. 240V \/ 1-phase. Adjustable legs. Bench-embedding possible. Max 230°F. SGS Listed. Ships on wooden pallet - scheduled delivery. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 330 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 530 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing - HIVE beehive design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e18.11\" diameter - same body as HIVE Mini 6 and 10.5\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity - 10 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAir tunnel pre-installed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eShips on wooden pallet - scheduled delivery\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 530 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 10 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5\" (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e35.3 lbs (16 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel open cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel\u003c\/td\u003e\n\u003ctd\u003ePre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE Mini series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | Single 30A \/ 10 AWG | 330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | Single 50A \/ 8 AWG | 330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.5kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | Single 50A \/ 8 AWG | 330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all three HIVE Mini models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for any HIVE Mini model\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDelivery and warranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery method\u003c\/td\u003e\n\u003ctd\u003eFreight on wooden pallet - scheduled appointment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eWild beehive - open cage form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE Mini 9kW floor-standing sauna heater - stainless steel open cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e330 lbs of 2\" - 4\" (5-10 cm) Round Sauna Stones \u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAir tunnel (pre-installed on heater)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM HIVE Mini safety railing (recommended), HIVE Mini embedding flange (for bench mounting). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Mini 9STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e9kW for 318-530 cu ft - beyond the HIVE Mini 6 range\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 9kW extends the HIVE Mini's room coverage from the 6kW's 318 cu ft ceiling up to 530 cu ft - adding 212 cu ft of coverage in the same body. For mid-size sauna cabins, two-bench rooms, and saunas with cold surfaces that push adjusted cubic footage above 318 cu ft, the HIVE Mini 9 is the correct step up from the 6kW without changing the heater's physical dimensions or stone capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame 330 lb stone mass - same body as all HIVE Mini models\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 9 carries the same 330-lb stone load in the same 18.11\" diameter cage as the 6kW and 10.5kW. The physical size of the heater in the sauna room does not change between HIVE Mini output levels. More output driving the same stone mass means faster heat-up to bathing temperature and greater capacity to sustain that temperature through the session and back-to-back use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSingle circuit - no extension box required\u003c\/div\u003e\n\u003cp\u003eUnlike the full HIVE series (12kW+) which requires dual circuits and a UKU Extension Box, the HIVE Mini 9kW operates on a single 50A \/ 8 AWG circuit with no extension box. The UKU control connects directly to the heater. One circuit, one control, no additional hardware. Simpler electrical installation than the full HIVE at a room range that bridges the gap between the DROP series and the full HIVE.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOpen beehive cage - direct stone-to-element contact\u003c\/div\u003e\n\u003cp\u003eThe open stainless steel cage allows air to circulate through the full 330-lb stone mass from multiple directions simultaneously. Stones throughout the pile are heated evenly by direct element contact rather than only those adjacent to the base elements. When water is ladled, it contacts stones at multiple temperature levels, producing soft, layered steam that distributes evenly through the sauna room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAir tunnel pre-installed - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe air tunnel is standard in all current HIVE Mini models and is pre-installed on the heater. For a 318-530 cu ft sauna room at 9kW, the air tunnel reduces heat-up time meaningfully - getting the room to bathing temperature faster without additional electrical load. It also reduces thermal stress on the heating elements, extending their service life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a mid-size sauna\u003c\/div\u003e\n\u003cp\u003eA 318-530 cu ft room at 9kW takes 30-45 minutes to reach bathing temperature. Upgrading to UKU WiFi at checkout adds HUUM app control - start the preheat from anywhere on iOS or Android and arrive to a ready sauna. No extension box required for the WiFi upgrade on the 9kW. For regular sauna users, the scheduled preheat function in the app removes the need to plan around warm-up time entirely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE Mini 9kW floor-standing sauna heater package with UKU control and 330 lbs olivine stones\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-uku-local-black-huum-hive-mini-9kw-electric-sauna-heater-package-1182035000.jpg?v=1782278272\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Mini 9STU. 9kW. 318-530 cu ft. The mid-range HIVE Mini - more output, same body, single 50A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Mini 9STU Package steps up from the HIVE Mini 6 with 50% more output in the same 18.11\" body for rooms from 318 to 530 cubic feet. The package includes every required component: the HIVE Mini 9kW heater with pre-installed air tunnel, UKU control (Local Black or WiFi at checkout), and 330 lbs of rounded olivine diabase stones in 10 boxes. No UKU Extension Box required. Delivered on a wooden pallet via scheduled freight. A licensed electrician is required for the 50A \/ 8 AWG installation. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - HIVE Mini 9kW, UKU control, and 330 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-530 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame 330 lb stone capacity and body\u003c\/strong\u003e as HIVE Mini 6 and 10.5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - single circuit, direct UKU connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePallet delivery, scheduled appointment\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE Mini 6 vs 9 vs 10.5 - choosing the output\u003c\/span\u003e\n\u003ch4\u003eWhich HIVE Mini output is correct - 6kW, 9kW, or 10.5kW?\u003c\/h4\u003e\n\u003cp\u003eAll three HIVE Mini models share identical body dimensions (18.11\" diameter, 29.5\"H), stone capacity (330 lbs), and installation method. No UKU Extension Box is required for any of them. The selection is based on room size and adjusted cubic footage. HIVE Mini 6kW: 177-318 cu ft, single 30A \/ 10 AWG - the only HIVE Mini on a 30A circuit. HIVE Mini 9kW: 318-530 cu ft, single 50A \/ 8 AWG. HIVE Mini 10.5kW: 353-706 cu ft, single 50A \/ 8 AWG. The 9 and 10.5 share the same electrical specification - the choice between them is purely room size. The 9 and 10.5 ranges overlap from 353 to 530 cu ft: in this overlap zone, a well-insulated standard room at the lower end may be adequately served by the 9kW; a room with cold surfaces or high-frequency use benefits from the 10.5kW's headroom. Use the HUUM heater calculator in the Size Your Sauna document below to verify the adjusted cubic footage before selecting.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required. No GFI\/GFCI. HIVE Mini safety railing recommended. Embedding flange sold separately for bench installation. Pallet delivery requires a scheduled appointment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM HIVE Mini series 6kW 9kW 10.5kW identical body dimensions with different output specifications\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/ai_heater-package_huum-mobile-app.jpg?v=1778943360\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Mini 9STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52263810105626,"sku":"534-BDL-HIVEM9STULB","price":4519.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52263810138394,"sku":"534-BDL-HIVEM9STULB+WD","price":4624.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52263810171162,"sku":"534-BDL-HIVEM9STULB+WH","price":4535.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52263810203930,"sku":"534-BDL-HIVEM9STUWB","price":4535.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52263810236698,"sku":"534-BDL-HIVEM9STUWB+WD","price":4939.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52263810269466,"sku":"534-BDL-HIVEM9STUWB+WH","price":4535.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52263810302234,"sku":"534-BDL-HIVEM9STUWGD","price":4801.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52263810335002,"sku":"534-BDL-HIVEM9STUWG","price":5026.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52263810367770,"sku":"534-BDL-HIVEM9STUWB+MR","price":5289.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater-package.jpg?v=1778943349"},{"product_id":"huum-cliff-11stu-pkg-cliff-series-11kw-sauna-heater-package","title":"HUUM CLIFF 11STU Pkg CLIFF Series 10.5kW Sauna Heater Package","description":"\u003c!-- HUUM CLIFF 11STU Package - 11kW Complete Floor-Standing Sauna Heater, Natural Stone Surface --\u003e\u003c!-- Floor-standing | 240V\/1PH | 354-566 cu ft | Complete - control + UKU Ext Box + 165 lbs stones --\u003e\u003c!-- SKU: 534-BDL-CLIFF105STULBWDX | CLIFF Series | UKU Local w\/Wood Case or UKU WiFi at checkout --\u003e\u003c!-- Red Dot Award winner | Natural stone surface exterior | Minimal safety clearances --\u003e\u003c!-- Single 50A breaker \/ 6 AWG | 165 lbs (5 boxes) 1-2\" rounded olivine --\u003e\u003c!-- Stone size 1-2\" (3-5cm) - smaller than DROP\/HIVE which use 2-4\" stones --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia | Pallet delivery --\u003e\u003c!-- 7 document sections: CLIFF IOM | CLIFF Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=N6hyJYxvzYVhYE3h\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM CLIFF 11STU Pkg CLIFF Series 11kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CLIFF 11STU Package is a complete sauna heater package for rooms from 354 to 566 cubic feet, including the CLIFF 11kW floor-standing heater, UKU sauna control with wood case (Local or WiFi - selected at checkout), UKU Extension Box, and 165 lbs of rounded olivine diabase sauna stones (5 boxes). The CLIFF is a completely different heater concept from HUUM's DROP and HIVE families: where the DROP is a wall-mounted unit with a compact water-droplet form and the HIVE is an open beehive cage of maximum stone mass, the CLIFF is a slender vertical floor-standing tower with a natural stone surface that gives it the visual character of a Nordic cliff face. The CLIFF's defining engineering achievement is its exceptionally small safety clearances - as little as 9.45\" (24 cm) from surrounding walls at 11kW, reduced further to approximately half that with optional reflector panels - making it the correct choice for sauna rooms with limited wall space where other heaters cannot be placed.\u003c\/p\u003e\n\u003ch4\u003eThe CLIFF design - natural stone surface, slender tower, minimal clearances\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF heater is covered in natural stone on its exterior surfaces - the actual stone of the surrounding rock face that inspired the heater's name and form. This stone surface gives the CLIFF a visual character that is entirely unlike any other electric sauna heater: it does not look like an appliance. It reads as a stone column standing in the sauna room, concealing the heating elements and stone basket within a natural rock exterior. The Red Dot Award-winning design is the result of a deliberate design principle that the heater should be as visually unified with a natural sauna interior as possible. The slender vertical tower profile - 10.6\" wide - and the minimal wall clearances are what make the CLIFF the appropriate choice for sauna rooms where a wider or more projecting heater cannot be placed without consuming too much usable bench space or violating safety distances from the wall or bench.\u003c\/p\u003e\n\u003ch4\u003e165 lbs of stone in a slender tower - 1\"-2\" rounded olivine\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 11 carries 165 lbs (5 boxes) of rounded olivine diabase stones. This is a meaningful stone load for a slender tower heater - comparable to the DROP series but in a radically different form factor. The stone size specification for the CLIFF is different from the DROP and HIVE: the CLIFF uses 1\"-2\" (3-5 cm) rounded olivine stones rather than the 2\"-4\" (5-10 cm) stones used in the DROP and HIVE. The smaller stone size fits the CLIFF's narrower basket geometry and allows denser packing within the slender tower body. Using the wrong stone size - particularly oversized stones - can restrict airflow through the CLIFF's basket and affect both performance and element life. The 5 boxes of correct-specification 1\"-2\" rounded olivine included in this package are the right stones for this heater. The internal air duct system speeds up heating by approximately 25% by directing airflow efficiently through the stone mass, and removable ribs inside the basket make stone loading and arrangement easier and more precise.\u003c\/p\u003e\n\u003ch4\u003eUKU Extension Box included - single 50A \/ 6 AWG circuit\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 11kW package includes the UKU Extension Box, which is included in this package (indicated by the X in the SKU suffix). The 11kW CLIFF requires a single 50A two-pole breaker and 6 AWG wire - a single-circuit installation unlike the full HIVE's dual-circuit requirement, but with heavier wire than the HIVE Mini 9's 50A \/ 8 AWG. Confirm that the electrical panel has an available 50A slot and engage a licensed electrician to plan the 6 AWG wire run before ordering. The control is UKU Local w\/Wood Case as standard, with UKU WiFi available at checkout. This package ships on a wooden pallet via scheduled freight delivery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 11kW floor-standing sauna heater package for rooms from 354 to 566 cubic feet. Includes CLIFF 11kW heater, UKU control with wood case (Local or WiFi - select at checkout), UKU Extension Box, and 165 lbs of rounded olivine diabase stones (5 boxes). Natural stone surface exterior - Red Dot Award-winning design. Slender 10.6\"-wide tower - minimal safety clearances (9.45\" from walls at 11kW). Internal air duct - 25% faster heat-up. Removable ribs for precise stone loading. 165 lbs stone capacity - 1\"-2\" rounded olivine (smaller than DROP\/HIVE). Single 50A breaker, 6 AWG wire. 240V \/ 1-phase. Max 230°F. SGS Listed. Ships on wooden pallet - scheduled delivery. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + ext box + 165 lbs stones\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e11 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e354 to 566 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNatural stone surface exterior - Red Dot Award design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlender 10.6\" wide tower - floor-standing\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMinimal clearances - 9.45\" from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e165 lb stone capacity - 5 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e1\"-2\" rounded olivine - correct CLIFF stone size\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemovable ribs for precise stone loading\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local w\/Wood Case or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 6 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eShips on wooden pallet - scheduled delivery\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e11 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e43.75 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e6 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 5 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e1\" to 2\" (3-5 cm) rounded - CLIFF-specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eClearances and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e10.6\" (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e9.45\" (24 cm) at 11kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith reflector panels\u003c\/td\u003e\n\u003ctd\u003eApproximately half standard clearances\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone loading\u003c\/td\u003e\n\u003ctd\u003eRemovable ribs for easier precise loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eInternal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior surface\u003c\/td\u003e\n\u003ctd\u003eNatural stone - Nordic cliff face aesthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlender vertical tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel components, natural stone exterior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local w\/Wood Case\u003c\/td\u003e\n\u003ctd\u003eDigital control with thermo-ash wood enclosure - on-site\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired and included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eCLIFF series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF Mini 3.5\/4kW\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | 106-212 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 165 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 165 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 11kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e354-566 cu ft | 50A \/ 6 AWG | 165 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CLIFF 10.5kW floor-standing sauna heater - natural stone surface exterior\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control with wood case (Local or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRounded olivine diabase sauna stones - 5 boxes (165 lbs) - 1\"-2\" CLIFF size\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM CLIFF safety railing (recommended), reflector panels (reduce wall clearances to approximately half), CLIFF embedding flange (for bench installation). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CLIFF 11STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eNatural stone surface - the Nordic cliff aesthetic\u003c\/div\u003e\n\u003cp\u003eThe CLIFF exterior is covered in natural stone - not a stone-textured finish, but actual natural stone surfaces that give the heater the visual character of a Nordic cliff face. The Red Dot Award-winning design makes the CLIFF the only electric sauna heater that reads as a natural stone element in the room rather than an appliance. From every angle the stone surface is visible, consistent with HUUM's design principle that the heater should be stylish from all directions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eMinimal clearances - fits where others cannot\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 11kW requires only 9.45\" (24 cm) safety clearance from surrounding walls - a fraction of the clearance required by most other floor-standing heaters at this output level. With optional reflector panels installed, this clearance is approximately halved. For sauna rooms with limited space between the heater position and the wall or bench, the CLIFF may be the only 11kW heater that can be correctly installed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSlender 10.6\" tower - maximum usable bench space\u003c\/div\u003e\n\u003cp\u003eAt 10.6\" wide, the CLIFF has a significantly smaller footprint than round floor-standing heaters like the HIVE Mini. The slender vertical tower maximises the usable bench and floor space in the sauna room, particularly in smaller or narrowly configured rooms where a wider heater would consume too much floor area or project too far from the wall into the bathing zone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eInternal air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe CLIFF's internal air duct directs airflow more efficiently through the stone mass during warm-up, reducing heat-up time by approximately 25%. For an 11kW heater covering rooms up to 566 cu ft, faster heat-up translates directly to a shorter wait from switch-on to bathing temperature - a meaningful benefit for regular sauna users and commercial installations where session turnaround matters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRemovable ribs - easier, more precise stone loading\u003c\/div\u003e\n\u003cp\u003eThe CLIFF's internal basket ribs are removable, making it significantly easier to load the 165 lbs of 1\"-2\" rounded olivine stones into the narrow tower body precisely and without damage to the elements. Correct stone placement in the CLIFF basket is important for airflow, element life, and steam quality - the removable ribs are the engineering detail that makes correct loading practical rather than difficult.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a large sauna\u003c\/div\u003e\n\u003cp\u003eA 354-566 cu ft sauna room at 11kW takes 40-55 minutes to reach bathing temperature. Upgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android - start the preheat before leaving work and arrive to a ready sauna. The UKU Extension Box is included in this package; no additional hardware is needed for the WiFi upgrade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/CliffPKG1.jpg?v=1779376694\u0026amp;width=800\" alt=\"HUUM CLIFF 11kW floor-standing sauna heater package with natural stone surface, UKU control with wood case, and 165 lbs olivine stones\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - Red Dot Award winner\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF 11STU. 11kW. 354-566 cu ft. Natural stone surface. Slender tower. Minimal clearances.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CLIFF is HUUM's most architecturally distinctive heater - a slender floor-standing tower with a natural stone exterior surface, designed for sauna rooms where space is limited and the heater's visual character is as important as its heating performance. At 11kW covering rooms from 354 to 566 cubic feet, the CLIFF 11 is the largest output in the CLIFF floor-standing series. The package includes the CLIFF 11kW heater, UKU control with wood case (Local or WiFi at checkout), UKU Extension Box, and 5 boxes of 1\"-2\" rounded olivine stones. Ships on a wooden pallet via scheduled freight. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - CLIFF 11kW, UKU control w\/wood case, UKU Ext Box, 165 lbs stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11kW, 354-566 cu ft\u003c\/strong\u003e - single 50A \/ 6 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural stone surface\u003c\/strong\u003e - Red Dot Award design, Nordic cliff aesthetic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal clearances\u003c\/strong\u003e - 9.45\" from walls, halved with reflector panels\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1\"-2\" rounded olivine stones\u003c\/strong\u003e - CLIFF-specific size, 5 boxes included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eCLIFF vs DROP vs HIVE - choosing the right HUUM\u003c\/span\u003e\n\u003ch4\u003eWhen the CLIFF is the right HUUM heater - and when it is not\u003c\/h4\u003e\n\u003cp\u003eThe HUUM range covers three distinct floor-standing heater families for larger rooms. The DROP series (wall-mounted, 122 lbs stones) is the compact wall-mounted choice for rooms up to 460 cu ft. The HIVE and HIVE Mini series (floor-standing open beehive, 330-528 lbs stones) prioritise maximum stone mass for soft sustained steam. The CLIFF (floor-standing slender tower, natural stone surface, 165 lbs stones, minimal clearances) is the correct choice when two conditions apply: the room is between 354 and 566 cubic feet, and the sauna room layout makes minimal wall clearance a priority - either because bench positions leave limited space for a wider heater, or because the aesthetic calls for a natural stone element in the room rather than a metal cage or water-drop form. When space is not the constraint and maximum stone mass is the priority for the same room range, the HIVE Mini 9 or 10.5 would carry more stone in the same room. When the CLIFF's natural stone exterior and slender profile are the design priority, nothing else in the HUUM range competes with it.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required. Single 50A \/ 6 AWG. No GFI\/GFCI. CLIFF safety railing recommended. Reflector panels and embedding flange sold separately. Pallet delivery requires a scheduled appointment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-cliff-6-kw-240v-electric-sauna-heater-1182030828_f90e7663-49ab-483c-bbda-4cd5f0bd14c4.jpg?v=1782326810\u0026amp;width=800\" alt=\"HUUM CLIFF 11kW installed in sauna showing slender tower profile with natural stone surface and minimal wall clearance\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"hhttps:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF 11STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones (including wrong stone size), operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52263836188954,"sku":"534-BDL-CLIFF105STULBX","price":4341.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52263836221722,"sku":"534-BDL-CLIFF105STULBWDX","price":4446.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52263836254490,"sku":"534-BDL-CLIFF105STULBWHX","price":4357.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52263836287258,"sku":"534-BDL-CLIFF105STUWBX","price":4603.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52263836320026,"sku":"534-BDL-CLIFF105STUWBWDX","price":4864.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52263836352794,"sku":"534-BDL-CLIFF105STUWBWHX","price":4775.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52263836385562,"sku":"534-BDL-CLIFF105STUWGDX","price":5526.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52263836418330,"sku":"534-BDL-CLIFF105STUWGX","price":5003.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52263836451098,"sku":"534-BDL-CLIFF105STUWMRX","price":5526.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/CliffPKG1.jpg?v=1779376694"},{"product_id":"huum-drop-7stu-pkg-drop-series-7-5kw-sauna-heater-package","title":"HUUM DROP 7STU Pkg DROP Series 7.5kW Sauna Heater Package","description":"\u003c!-- HUUM DROP 7STU Pkg - DROP Series 7.5kW Sauna Heater Package - SKU 534-BDL-DROP75STULB --\u003e\u003c!-- SKU: 534-BDL-DROP75STULB | DROP Series Package | 248-389 cu ft (adjusted) | Electric --\u003e\u003c!-- Model: DROP 7STU PKG | 7.5kW | Wall-mounted - hemispheric water-drop form --\u003e\u003c!-- LB suffix = UKU Local controller included (no Extension Box - 7.5kW is under 9kW threshold) --\u003e\u003c!-- PACKAGE INCLUDES: DROP 7.5kW heater + UKU Local controller + 121 lbs stones (4 boxes, 5-10 cm) --\u003e\u003c!-- No UKU Extension Box required for 7.5kW --\u003e\u003c!-- DROP is a COMPLETELY DIFFERENT product platform from CLIFF\/STEEL: hemispheric rounded form --\u003e\u003c!-- Red Dot Design Award winner - inspired by a drop of water --\u003e\u003c!-- Do not hang from cedar paneling alone - anchor to framing --\u003e\u003c!-- 121 lbs \/ 55 kg stones (4 boxes, 5-10 cm rounded olivine) - included in package --\u003e\u003c!-- Safety distances: refer to installation manual (side clearances differ by model) --\u003e\u003c!-- 240V\/1PH | 40A circuit breaker | 8AWG wire (different from CLIFF\/STEEL's 30A\/10AWG) --\u003e\u003c!-- Bench embedding: min. 14.8\" must protrude above bench surface (Flange D, sold separately) --\u003e\u003c!-- Optional: DROP safety railing | Flange D embedding flange | Drip Tray --\u003e\u003c!-- SGS certified | 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- Documents: DROP IOM | DROP Installation Video | DROP Elements Required | UKU IOM | UKU Installation Diagram | UKU Installation Video | Warranty | Stone Placement Video | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .dp { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .dp { padding: 0; }\n    .dp-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .dp-feat { padding: 0.8rem 0.9rem; }\n    .dp-inc-grid { grid-template-columns: 1fr; }\n    .dp-spec-grid { gap: 1.25rem; }\n    .dp-spec-table, .dp-spec-table tbody, .dp-spec-table tr, .dp-spec-table td { display: block; width: 100%; }\n    .dp-spec-table { border: none; }\n    .dp-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .dp-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .dp-spec-table td { border: none; padding: 1px 0; }\n    .dp-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .dp-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .dp-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"dp\"\u003e\n\u003cdiv class=\"dp-desc\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=OBKVjEmL09xgvUL7\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=Lbu15qA7wrWZ6MeK\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\n\u003c\/h2\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/-6fJDlij0v0?si=qa4NnZEKvDirdeoX\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM DROP 7STU Pkg DROP Series 7.5kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM DROP 7STU Package is the complete ready-to-operate bundle for the 7.5kW DROP electric sauna heater - including the heater, UKU Local controller, and 121 lbs of sauna stones (4 boxes, 5-10 cm rounded olivine). The DROP is an entirely different product platform from the CLIFF and STEEL: where those heaters are slim floor-standing pillars, the DROP is a wall-mounted hemispheric heater inspired by the form of a water droplet. It tapers from a wide stone-holding basket at the top into a narrower base, creating a sculptural shape that HUUM describes as the statement piece of the sauna room. The DROP won the Red Dot Design Award for its masterful craftsmanship and unique aesthetic. At 7.5kW with a 121-lb stone capacity, it covers sauna rooms from 248 to 389 adjusted cubic feet. The DROP 7.5kW requires a 40A circuit breaker and 8AWG wire - a larger electrical requirement than the CLIFF and STEEL 6kW models (30A\/10AWG). No UKU Extension Box is required for the 7.5kW DROP. The heater includes a Heater Element Separator and Heat Shield Hood as standard. The bottom of the wall mounting bracket sits 12.2\" above the hard floor. Minimum wall thickness of 3.94\" (100mm) is required - the DROP must be anchored to wall framing, not cedar paneling alone. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eThe DROP platform - hemispheric wall-mounted water-drop form\u003c\/h4\u003e\n\u003cp\u003eThe HUUM DROP is described by HUUM as being inspired by the absolute purest of elements in nature - a drop of water. Its organic, hemispherical silhouette is the most visually distinctive wall-mounted sauna heater form on the market - a sculptural shape that tapers from a wide stone-holding open basket at the top to a narrower base, mimicking the outline of a water droplet suspended at the moment before it falls. HUUM's own description of the result: the organic and minimalist design of the DROP heater makes it the statement piece of the sauna. The open basket exposes all 121 lbs of rounded olivine stones to the sauna air and to the bather's ladle of water, maximising the visible stone surface and stone contact with the heating elements. The DROP received the Red Dot Design Award - one of three Red Dot awards HUUM has earned across their product lineup - for the combination of sculptural design, HUUM's stone-primary philosophy, and the practical elegance of integrating a large stone capacity into a wall-mounted form.\u003c\/p\u003e\n\u003ch4\u003eStone-primary philosophy in a wall-mounted form\u003c\/h4\u003e\n\u003cp\u003eHUUM applies the same stone-primary philosophy to the DROP that runs through the CLIFF and STEEL platforms: build using very little metal so that heat comes mainly from the stones and only very little from the metal. HUUM's description of the consequence: this maximises the good negative ions from the stones, like in traditional saunas, and keeps the positive ions from the metal at a minimum. At 121 lbs of stones in a wall-mounted 7.5kW heater, the stone-to-power ratio is deliberately high - more stone mass than most wood-burning stoves in a comparable size class. HUUM notes this directly: despite its compact size, this heater can accommodate up to 55 kg of stones, which is more than most wood-burning heaters. The large stone mass produces soft, consistent steam and long-lasting heat with each ladle of water. The 5-10 cm rounded olivine stones included in the package are HUUM's recommended specification for the DROP - rounder stones allow better airflow through the stone basket and produce milder steam.\u003c\/p\u003e\n\u003ch4\u003ePackage contents and critical installation notes\u003c\/h4\u003e\n\u003cp\u003eThe DROP 7STU Package includes the DROP 7.5kW heater, UKU Local controller, and 121 lbs of sauna stones (4 boxes, 5-10 cm). No UKU Extension Box is required for the 7.5kW - unlike the CLIFF 9 and CLIFF 10.5 packages. The heater also includes a Heater Element Separator and Heat Shield Hood as standard items that protect the heating elements and the sauna wall behind the heater. The electrical specification for the DROP 7.5kW requires a 40A dedicated circuit and 8AWG wire - larger than the CLIFF and STEEL 6kW models (30A\/10AWG). The wall mounting bracket bottom sits 12.2\" above the hard floor surface. Minimum wall thickness is 3.94\" (100mm) - the DROP must be securely anchored to wall framing studs, not to cedar paneling alone. The total weight of the heater and stones together is approximately 157 lbs, which requires solid structural anchoring. Optional Flange D embedding flange (sold separately) allows the DROP to be partially set into a sauna bench - at least 14.8\" of the heater must protrude above the bench surface in this configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-hook\"\u003e7.5kW wall-mounted electric sauna heater package for rooms from 248 to 389 adjusted cubic feet. DROP 7STU Pkg - complete package: DROP 7.5kW heater, UKU Local controller, and 121 lbs stones (4 boxes, 5-10 cm rounded olivine). No UKU Extension Box required. Hemispheric water-drop form - Red Dot Design Award winner. Stone-primary design - 121 lbs in an open basket exceeds most wood-burning stoves. Heater Element Separator and Heat Shield Hood included. Wall-mounted: bracket bottom 12.2\" from hard floor. Min. wall thickness 3.94\" (100mm). Anchor to framing - not cedar paneling alone. 240V\/1PH - 40A circuit breaker - 8AWG (note: different from CLIFF\/STEEL 6kW which require 30A\/10AWG). Max 230°F. Stone Placement Video included. Optional: DROP safety railing; Flange D bench embedding; Drip Tray. SGS certified. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"dp-badges\"\u003e\n\u003cspan class=\"dp-badge\"\u003e7.5 kW\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e248 to 389 cu ft (adjusted)\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eComplete package - heater, UKU Local, and 121 lbs stones\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eDROP - hemispheric water-drop form - wall-mounted\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eRed Dot Design Award winner\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eStone-primary - 121 lbs exceeds most wood-burning stoves\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eHeater Element Separator and Heat Shield Hood included\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eBracket bottom 12.2\" from hard floor\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eMin. wall thickness 3.94\" - anchor to framing required\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e240V\/1PH - 40A - 8AWG\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eMax 230°F\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eOptional DROP safety railing\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eOptional Flange D bench embedding\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eOptional Drip Tray\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"dp-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"dp-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003ePackage contents\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater\u003c\/td\u003e\n\u003ctd\u003eHUUM DROP 7.5kW wall-mounted electric sauna heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController (included)\u003c\/td\u003e\n\u003ctd\u003eUKU Local controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required and not included for 7.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones (included)\u003c\/td\u003e\n\u003ctd\u003e121 lbs \/ 55 kg (4 boxes, 5-10 cm rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElement Separator (included)\u003c\/td\u003e\n\u003ctd\u003eHeater Element Separator - protects heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat Shield Hood (included)\u003c\/td\u003e\n\u003ctd\u003eHeat Shield Hood - wall protection behind heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e7.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e248 to 389 cu ft (adjusted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e121 lbs \/ 55 kg (4 boxes, 5-10 cm) - included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e5-10 cm rounded olivine (2-4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eDirect - stones in contact with heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat philosophy\u003c\/td\u003e\n\u003ctd\u003eStone-primary - minimal metal mass by design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eDROP design and awards\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eHemispheric water-drop silhouette - wall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eA drop of water - HUUM's description\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Design Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone display\u003c\/td\u003e\n\u003ctd\u003eOpen basket - 121 lbs stones fully visible in sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone-to-size ratio\u003c\/td\u003e\n\u003ctd\u003eMore stone capacity than most wood-burning stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eDROP vs CLIFF vs STEEL - platform comparison\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP form\u003c\/td\u003e\n\u003ctd\u003eHemispheric water-drop, wall-mounted, open basket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF form\u003c\/td\u003e\n\u003ctd\u003eSlim rectangle open-cage pillar, floor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL form\u003c\/td\u003e\n\u003ctd\u003eSlim enclosed square-pillar, floor-standing or wall (Mini)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP stones\u003c\/td\u003e\n\u003ctd\u003e5-10 cm rounded olivine (2-4 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF\/STEEL stones\u003c\/td\u003e\n\u003ctd\u003e3-5 cm rounded olivine (1-2 in) - smaller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP electrical (7.5kW)\u003c\/td\u003e\n\u003ctd\u003e40A \/ 8AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF\/STEEL 6kW electrical\u003c\/td\u003e\n\u003ctd\u003e30A \/ 10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eWall mounting requirements\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting type\u003c\/td\u003e\n\u003ctd\u003eWall-mounted with bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBracket bottom height from floor\u003c\/td\u003e\n\u003ctd\u003e12.2 in (310 mm) above hard floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum wall thickness\u003c\/td\u003e\n\u003ctd\u003e3.94 in (100 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall anchoring requirement\u003c\/td\u003e\n\u003ctd\u003eMust anchor to framing studs - not cedar paneling alone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal weight (heater + stones)\u003c\/td\u003e\n\u003ctd\u003eApprox. 157 lbs - structural anchoring required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding option\u003c\/td\u003e\n\u003ctd\u003eMin. 14.8 in must protrude above bench surface (Flange D)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eElectrical (DROP 7.5kW)\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e40A dedicated circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e8AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote vs CLIFF\/STEEL 6kW\u003c\/td\u003e\n\u003ctd\u003eDROP 7.5kW requires 40A\/8AWG (vs 30A\/10AWG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 7.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-spec-block\"\u003e\n\u003ch4\u003eUKU Local controller (included) and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"dp-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eController type\u003c\/td\u003e\n\u003ctd\u003eUKU Local - physical wall panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote \/ app control\u003c\/td\u003e\n\u003ctd\u003eNot available (UKU Local - no Wi-Fi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi upgrade\u003c\/td\u003e\n\u003ctd\u003eUKU Wi-Fi controller available separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eDROP safety railing (DROP-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eFlange D (DROP-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater management\u003c\/td\u003e\n\u003ctd\u003eDrip Tray (catches water runoff) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"dp-inc-grid\"\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eHUUM DROP 7.5kW wall-mounted electric sauna heater\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eUKU Local controller (wall panel)\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003e132 lbs \u003cspan\u003eof 2\" - 4\" (5-10 cm) \u003c\/span\u003e\u003cspan\u003eRound Sauna Stones\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eWall mounting bracket\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eDROP Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003eUKU Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"dp-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e Licensed electrician for wiring (240V\/1PH, 40A dedicated circuit, 8AWG wire). An additional box of stones is recommended. Wall must be anchored to framing studs (minimum 3.94\" \/ 100mm wall thickness). \u003cstrong\u003eOptional DROP-specific accessories (sold separately):\u003c\/strong\u003e DROP safety railing; Flange D embedding flange (bench integration); Drip Tray (catches water runoff). To upgrade to Wi-Fi control, the UKU Wi-Fi controller is available separately.\u003c\/p\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 7STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"dp-feat-grid\"\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eComplete package - heater, UKU Local, and 121 lbs of stones\u003c\/div\u003e\n\u003cp\u003eThe DROP 7STU Package combines the three items needed to operate the DROP 7.5kW into a single order. The DROP has no built-in controls and requires a UKU controller for all operation. Unlike the CLIFF 9 and 10.5 packages, no UKU Extension Box is required for the 7.5kW model - only the heater, controller, and stones are needed. All three arrive together. The only requirement that remains after delivery is the licensed electrician for the 240V\/1PH, 40A, 8AWG wiring and the structural wall mounting. The package includes the DROP-specific Heater Element Separator and Heat Shield Hood alongside the heater - both are protective accessories specific to the DROP platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eHemispheric water-drop form - Red Dot Award winner\u003c\/div\u003e\n\u003cp\u003eThe DROP's hemispherical silhouette is unlike any other electric sauna heater form. It tapers from a wide open stone basket at the top into a narrower base, mimicking the outline of a water droplet. HUUM's description of the design: the sculptural hemispheric shape of this sauna heater mimics the absolute purest of elements in nature - a drop of water. The organic and minimalist design of the DROP heater makes it the statement piece of the sauna. The DROP received the Red Dot Design Award - one of three Red Dot awards HUUM has earned - for the combination of artistic design, functional stone-primary philosophy, and the elegant integration of a large stone capacity into a wall-mounted form.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003e121 lbs of stones - more than most wood-burning stoves\u003c\/div\u003e\n\u003cp\u003eHUUM's own description of the DROP's stone capacity is direct and precise: despite its compact size, this heater can accommodate up to 55 kg of stones, which is more than most wood-burning heaters. At 121 lbs in a wall-mounted 7.5kW heater, the DROP holds significantly more stone mass than most heaters in its output and size class. The open basket exposes all 121 lbs of stones to the sauna air and to the bather's ladle of water. Direct contact between the stones and the heating elements maximises heat transfer efficiency. HUUM's stone-primary philosophy: the heat comes mainly from the stones and only very little from the metal, maximising the good negative ions from the stones as in traditional saunas.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003e40A \/ 8AWG - important electrical distinction from CLIFF\/STEEL 6kW\u003c\/div\u003e\n\u003cp\u003eThe DROP 7.5kW requires a 40A dedicated circuit and 8AWG wire. This is a larger electrical requirement than the CLIFF 6 and STEEL 6 (both 30A\/10AWG) and than the STEEL Mini 4 (15A\/14AWG). Buyers moving to the DROP from a CLIFF 6 or STEEL 6 installation, or comparing the two platforms side by side, need to account for this difference when planning the electrical installation. A licensed electrician should confirm the correct circuit capacity before installation. The DROP 7.5kW does not require a UKU Extension Box, unlike the CLIFF 9 and CLIFF 10.5 packages - the electrical sizing is the main installation distinction to plan for.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eStructural wall mounting - framing anchors required\u003c\/div\u003e\n\u003cp\u003eThe DROP 7.5kW heater and stones together weigh approximately 157 lbs. HUUM's installation guidance is explicit: the DROP must not be hung from cedar paneling alone - it must be anchored securely to wall framing studs. Minimum wall thickness of 3.94\" (100mm) is required. The mounting bracket bottom sits 12.2\" above the hard floor surface (cement or tile - not wooden subfloor). These requirements are specific to the DROP's wall-mounted configuration and larger stone mass compared to the STEEL Mini 4. The included DROP Installation Video and Stone Placement Video cover the correct mounting procedure and stone loading sequence in detail, and both are available through the product page documentation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-feat\"\u003e\n\u003cdiv class=\"dp-feat-title\"\u003eDROP Series - 4.5kW, 6kW, 7.5kW, and 9kW models\u003c\/div\u003e\n\u003cp\u003eThe DROP 7STU Package covers the 7.5kW configuration of the DROP Series. The DROP platform spans four output levels: DROP 4.5 (4.5kW, 110-248 cu ft, 30A\/10AWG), DROP 6 (6kW, 180-350 cu ft, 30A\/10AWG), DROP 7.5 in this package (7.5kW, 248-389 cu ft, 40A\/8AWG), and DROP 9 (9kW, 290-530 cu ft, 40A\/8AWG). All four share the same hemispheric water-drop form, stone-primary philosophy, Red Dot Award-winning design, open stone basket with direct element contact, Heater Element Separator and Heat Shield Hood inclusion, SGS certification, and 5-year warranty. The DROP 7.5 and DROP 9 require 40A\/8AWG; the 4.5 and 6 require 30A\/10AWG. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"dp-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM DROP 7STU Package 534-BDL-DROP75STULB 7.5kW wall-mounted electric sauna heater 248-389 cu ft 121 lbs stones hemispheric water-drop Red Dot Award\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/DropPKG1_4dbf3290-1198-476f-825e-5875b7e90bc2.jpg?v=1779377821\u0026amp;width=800\" class=\"dp-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"dp-brand-tag\"\u003eDesigned in Estonia - SGS Certified - DROP Series - Red Dot Award - Complete Package\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 7STU Pkg. 7.5kW. 248-389 cu ft. Heater, UKU Local, and 121 lbs stones. Red Dot Award.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The DROP 7STU Package is the complete ready-to-operate bundle for the DROP 7.5kW wall-mounted heater - hemispheric water-drop form, Red Dot Award winner, stone-primary design with 121 lbs of stones (more than most wood-burning stoves), UKU Local controller, Heater Element Separator, and Heat Shield Hood included. 40A\/8AWG wiring and structural wall anchoring required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"dp-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e7.5kW wall-mounted\u003c\/strong\u003e - 248-389 cu ft - hemispheric water-drop form\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed Dot Design Award winner\u003c\/strong\u003e - HUUM's stone-primary philosophy\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e121 lbs stones included (4 boxes, 5-10 cm)\u003c\/strong\u003e - exceeds most wood-burning stoves\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUKU Local included - no Extension Box required\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e40A\/8AWG required - anchor to framing - 5-year warranty (excl. elements)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"dp-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"dp-brand-tag\"\u003eDROP 7STU Pkg vs CLIFF 9STU Pkg vs CLIFF 6 - HUUM electric heater comparison\u003c\/span\u003e\n\u003ch4\u003eDROP 7STU Pkg vs CLIFF 9STU Pkg vs CLIFF 6 - form, room range, and electrical requirements\u003c\/h4\u003e\n\u003cp\u003eThree HUUM electric heater options serve different room sizes, installation types, and design preferences. CLIFF 6 H1004012 (heater only): 6kW, 176-353 cu ft, floor-standing slim open-cage pillar, 10.6\"W x 6.3\"D, 165 lbs stones (5 boxes, 3-5 cm) sold separately, 2.36\" side clearances, 30A\/10AWG, no Extension Box. Right when the CLIFF's tightest clearances and floor-standing slim format are the priority. DROP 7STU Pkg 534-BDL-DROP75STULB (this listing): 7.5kW, 248-389 cu ft, wall-mounted hemispheric water-drop form, 121 lbs stones (4 boxes, 5-10 cm) included, UKU Local included, 40A\/8AWG, no Extension Box. Right for medium home saunas where the DROP's award-winning wall-mounted form, stone-primary large capacity, and complete package purchase are the specification. CLIFF 9STU Pkg 534-BDL-CLIFF90STULB: 9kW, 317-529 cu ft, floor-standing slim open-cage pillar, 165 lbs stones (5 boxes, 3-5 cm) included, UKU Local + Extension Box included, 30A\/10AWG, 9.45\" side clearances. Right for larger rooms (317-529 cu ft) where the CLIFF's floor-standing open-cage pillar format is the specification. The DROP 7STU Package is the right choice when the 248-389 cu ft range, wall-mounted hemispheric design, and complete package format are the priorities.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM DROP 7STU 7.5kW wall-mounted hemispheric vs CLIFF 9STU floor-standing vs CLIFF 6 heater-only comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-DROP-blue-guard_5.jpg?v=1779377916\u0026amp;width=800\" class=\"dp-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"dp-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"dp-manual\"\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eDROP Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eDROP Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e DROP Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"dp-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"dp-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"dp-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 7.5kW carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operation manual and stone placement video, use of incorrect stone type or size (decorative stones must not be used; only rounded olivine 5-10 cm recommended), operating without the required stone load, damage from inadequate electrical installation, or damage caused by hanging the heater from cedar paneling without proper structural anchoring to wall framing. The UKU Local controller included in the package carries its own separate HUUM product warranty terms. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52268169658650,"sku":"534-BDL-DROP75STULB","price":3054.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52268169691418,"sku":"534-BDL-DROP75STULB+WD","price":3159.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52268169724186,"sku":"534-BDL-DROP75STULB+WH","price":3070.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52268169756954,"sku":"534-BDL-DROP75STUWB","price":3316.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52268169789722,"sku":"534-BDL-DROP75STUWB+WD","price":3577.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52268169822490,"sku":"534-BDL-DROP75STUWB+WH","price":3488.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52268169855258,"sku":"534-BDL-DROP75STUWGD","price":4239.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52268169888026,"sku":"534-BDL-DROP75STUWG","price":3716.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52268169920794,"sku":"534-BDL-DROP75STUWMR","price":4239.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/DropPKG1_4dbf3290-1198-476f-825e-5875b7e90bc2.jpg?v=1779377821"},{"product_id":"huum-hive-mini-10-6stu-pkg-hive-mini-series-10-6kw-sauna-heater-package","title":"HUUM HIVE Mini 11STU Pkg HIVE Mini Series 10.6kW Sauna Heater Package","description":"\u003c!-- HUUM HIVE Mini 10.6STU Package - 10.6kW Complete Floor-Standing Sauna Heater Package --\u003e\u003c!-- Floor-standing | 240V\/1PH | 353-706 cu ft | Complete - control + UKU Ext Box + 330 lbs stones --\u003e\u003c!-- SKU: 534-BDL-HIVEM105STULBWDX | HIVE Mini Series | UKU Local w\/Wood Case or UKU WiFi at checkout --\u003e\u003c!-- WDX in SKU = Wood case + Extension Box included --\u003e\u003c!-- Single 50A breaker \/ 8 AWG - same as HIVE Mini 9 | No dual circuit required --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia | Pallet delivery --\u003e\u003c!-- 8 document sections: HIVE IOM | HIVE Elements Required | UKU IOM | UKU Diagram | UKU Video | Warranty | Stone Requirements | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-green { background: #f0fdf4; border: 1px solid #86efac; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=U8yg5_memETvDIiu\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2 class=\"MuiTypography-root MuiTypography-h1 comp-typography comp-product-details__name css-m5p6uo\"\u003eHUUM HIVE Mini 11STU Pkg HIVE Mini Series 10.6kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE Mini 10.6STU Package is a complete sauna heater package for rooms from 353 to 706 cubic feet, including the HIVE Mini 10.6kW floor-standing heater, UKU sauna control with wood case (Local or WiFi - selected at checkout), UKU Extension Box, and 330 lbs of rounded olivine diabase sauna stones (10 boxes). The 10.6kW is the top output in the HIVE Mini series, extending the beehive open-cage design into the largest room range the HIVE Mini body can serve. It shares the same 18.11\" (460mm) diameter cage, the same 330-lb stone capacity, and the same floor-standing installation as the HIVE Mini 6 and 9 - what changes is the output level, the electrical specification, and the inclusion of the UKU Extension Box required at this output level.\u003c\/p\u003e\n\u003ch4\u003e10.6kW - the top of the HIVE Mini series\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini series runs from 6kW to 10.6kW across three output levels in the same physical body. The 6kW (177-318 cu ft) runs on a single 30A \/ 10 AWG circuit. The 9kW (318-530 cu ft) and 10.6kW (353-706 cu ft) both run on a single 50A \/ 8 AWG circuit - the electrical specification is identical between these two models. The distinction between the 9 and 10.6 is purely room size and output headroom: the 10.6kW extends coverage to 706 cubic feet and provides greater reserve capacity for rooms with cold surfaces - glass walls, tile floors, natural stone or masonry panels - that increase the effective thermal load above the raw cubic footage. For rooms between 353 and 530 cu ft that fall in the overlap zone with the 9kW, rooms with challenging cold surfaces are better served by the 10.6; well-insulated standard wood-walled rooms can be adequately served by either. For rooms from 531 to 706 cu ft, the 10.6kW is the correct and only HIVE Mini choice.\u003c\/p\u003e\n\u003ch4\u003e353-706 cu ft - the largest room range in the HIVE Mini series\u003c\/h4\u003e\n\u003cp\u003eAt 706 cubic feet, the HIVE Mini 10.6kW covers sauna rooms approaching the size at which the full HIVE series (12kW+) begins. The slight overlap between the HIVE Mini 10.6's ceiling and the full HIVE 12's floor (424-636 cu ft) means that rooms in the 531-636 cu ft range can be served by either the HIVE Mini 10.6 or the full HIVE 12. The key difference between these two options is stone mass: the HIVE Mini 10.6 carries 330 lbs; the full HIVE 12 carries 528 lbs. For this overlap zone, the HIVE Mini 10.6 is the appropriate choice for rooms with standard insulation and wood surfaces, operating on a single 50A circuit without dual-circuit wiring. The full HIVE 12 is the appropriate choice when maximum stone mass and the longest possible sustained session performance are the priorities, at the cost of dual 30A circuits and a UKU Extension Box.\u003c\/p\u003e\n\u003ch4\u003eUKU Extension Box included - UKU Local w\/Wood Case or WiFi at checkout\u003c\/h4\u003e\n\u003cp\u003eThe WDX in the SKU designates that this package includes the UKU control with wood case (W), and the UKU Extension Box (X). The extension box is required for the 10.6kW output level and is included in this package at no additional purchase. The standard control is UKU Local w\/Wood Case - a digital sauna control in a thermo-ash wood enclosure that complements natural timber sauna interiors. UKU WiFi is available at checkout, adding HUUM app remote preheat and scheduling on iOS and Android. Neither variant requires additional hardware beyond what is included in this package. This package ships on a wooden pallet via scheduled freight delivery.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 10.6kW floor-standing sauna heater package for rooms from 353 to 706 cubic feet. Includes HIVE Mini 10.6kW heater, UKU control with wood case (Local or WiFi - select at checkout), UKU Extension Box (required and included), and 330 lbs of rounded olivine diabase stones (10 boxes). Top of the HIVE Mini series - maximum output in the same 18.11\" diameter beehive body. Same 330 lb stone capacity as HIVE Mini 6 and 9. Air tunnel pre-installed - faster heat-up, extended element life. Single 50A breaker, 8 AWG wire - same as HIVE Mini 9. No dual circuit. 240V \/ 1-phase. Adjustable legs. Bench-embedding possible. Max 230°F. SGS Listed. Ships on wooden pallet - scheduled delivery. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + ext box + 330 lbs stones\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e10.6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e353 to 706 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eTop of the HIVE Mini series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eFloor-standing - 18.11\" diameter beehive body\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity - 10 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local w\/Wood Case or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAir tunnel pre-installed\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eShips on wooden pallet - scheduled delivery\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e10.6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e43.75 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e353 to 706 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 10 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5\" (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater weight\u003c\/td\u003e\n\u003ctd\u003e35.3 lbs (16 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel open cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel\u003c\/td\u003e\n\u003ctd\u003ePre-installed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local w\/Wood Case\u003c\/td\u003e\n\u003ctd\u003eDigital control with thermo-ash wood enclosure - on-site\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired and included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE Mini series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.6kW (this)\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | Ext box included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all three HIVE Mini models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs - identical across all three\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty and delivery\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery method\u003c\/td\u003e\n\u003ctd\u003eFreight on wooden pallet - scheduled appointment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign inspiration\u003c\/td\u003e\n\u003ctd\u003eWild beehive - open cage form\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE Mini 10.6kW floor-standing sauna heater - stainless steel open cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control with wood case (Local or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRounded olivine diabase sauna stones - (330 lbs)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAir tunnel (pre-installed on heater)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM HIVE Mini safety railing (recommended), HIVE Mini embedding flange (for bench mounting). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Mini 10.6STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eTop of the HIVE Mini - 353-706 cu ft\u003c\/div\u003e\n\u003cp\u003eThe 10.6kW is the highest output in the HIVE Mini series, extending coverage to 706 cubic feet in the same 18.11\" beehive body as the 6 and 9kW models. For rooms from 531 to 706 cu ft, it is the only HIVE Mini model available. For rooms in the 353-530 cu ft overlap with the 9kW, the 10.6 provides greater output headroom for rooms with cold surfaces or high-frequency use.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame 330 lb stone mass - same body as all HIVE Mini\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 10.6 carries the same 330 lbs of rounded olivine diabase stones in the same 18.11\" diameter open cage as the 6kW and 9kW. More output driving the same stone mass produces faster heat-up and greater sustained temperature capacity across larger rooms. All 10 boxes of stones included in this package are pre-specified at the correct 2\"-4\" rounded olivine size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU Extension Box included\u003c\/div\u003e\n\u003cp\u003eThe 10.6kW output level requires the UKU Extension Box to manage the heater load through the UKU control system. This extension box is included in the package - no separate purchase needed. The WDX in the SKU suffix confirms the wood case control (W) and extension box (X) are both included alongside the heater and stones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSingle 50A \/ 8 AWG - simpler than the full HIVE 12\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 10.6 requires a single 50A \/ 8 AWG circuit - the same as the HIVE Mini 9. This is meaningfully simpler than the full HIVE 12's dual 30A \/ 10 AWG dual-circuit installation. For rooms up to 706 cu ft where single-circuit wiring is preferred and 330 lbs of stone mass is sufficient, the HIVE Mini 10.6 avoids the complexity of a dual-circuit installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a large room\u003c\/div\u003e\n\u003cp\u003eA 353-706 cu ft sauna room at 10.6kW takes 40-60 minutes to reach bathing temperature. Upgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android - start the preheat from anywhere and arrive to a ready sauna. The UKU Extension Box is already included; no additional hardware is needed for the WiFi upgrade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAir tunnel pre-installed - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe air tunnel is standard in all current HIVE Mini models. For a 10.6kW heater covering rooms up to 706 cu ft, the 25% heat-up time reduction from the air tunnel is especially valuable - large rooms take longer to heat and the time saving from the air tunnel is proportionally greater. Element life is also extended by the improved airflow the tunnel provides.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2024-07\/huum-hive-mini-sauna-heater-package.jpg\" alt=\"HUUM HIVE Mini 10.6kW floor-standing sauna heater package with UKU control wood case, extension box, and 330 lbs olivine stones\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Mini 10.6STU. 10.6kW. 353-706 cu ft. The top HIVE Mini - maximum output, same 18.11\" body.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Mini 10.6STU Package is the complete top-of-range HIVE Mini installation: the 10.6kW heater with pre-installed air tunnel, UKU control with wood case (Local or WiFi at checkout), UKU Extension Box, and 330 lbs of rounded olivine diabase stones in 10 boxes. Everything needed for rooms from 353 to 706 cubic feet on a single 50A \/ 8 AWG circuit, in the same compact 18.11\" diameter floor-standing beehive body as the smaller HIVE Mini models. Delivered on a wooden pallet via scheduled freight. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - HIVE Mini 10.6kW, UKU control w\/wood case, UKU Ext Box, 330 lbs stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10.6kW, 353-706 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop of the HIVE Mini series\u003c\/strong\u003e - same 18.11\" body as 6 and 9kW\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Extension Box included\u003c\/strong\u003e - complete installation in one package\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePallet delivery, scheduled appointment\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE Mini 10.6 vs HIVE Mini 9 vs full HIVE 12\u003c\/span\u003e\n\u003ch4\u003eChoosing between the HIVE Mini 10.6, HIVE Mini 9, and full HIVE 12\u003c\/h4\u003e\n\u003cp\u003eHIVE Mini 9kW (318-530 cu ft, single 50A \/ 8 AWG, 330 lbs, no ext box): the correct choice for rooms below 531 cu ft where the 10.6's extra output is not needed. HIVE Mini 10.6kW (353-706 cu ft, single 50A \/ 8 AWG, 330 lbs, ext box included): the correct choice for rooms from 531-706 cu ft on a single circuit, or for rooms 353-530 cu ft with cold surfaces requiring more output. Full HIVE 12kW (424-636 cu ft, dual 30A \/ 10 AWG, 528 lbs, ext box required): the correct choice when maximum stone mass (528 lbs vs 330 lbs) and the longest sustained session performance are priorities, at the cost of dual-circuit electrical installation. For rooms 531-636 cu ft where both HIVE Mini 10.6 and full HIVE 12 are valid options, the deciding factor is stone mass vs electrical simplicity. Use the HUUM heater calculator in the Size Your Sauna document below to verify the adjusted room size before selecting.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required. Single 50A \/ 8 AWG. No GFI\/GFCI. HIVE Mini safety railing recommended. Embedding flange sold separately. Pallet delivery requires scheduled appointment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-mini-sauna-heater-with-air-tunnel_d6ef293b-abb0-4a9a-91b8-b0da57b12ddd.jpg?v=1779380864\u0026amp;width=800\" alt=\"HUUM HIVE Mini 10.6kW top model in 18.11 inch beehive cage showing same dimensions as 6kW and 9kW models\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eHIVE Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HIVE Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Video\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/www.bathingbrands.com\/57721\/huum\/hive-mini-106stu-pkg\/sauna-heater-kits\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e UKU Installation Video \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Mini 10.6STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52264025620762,"sku":"534-BDL-HIVEM105STULBX","price":4647.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52268465226010,"sku":"534-BDL-HIVEM105STULBWDX","price":4960.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52268465291546,"sku":"534-BDL-HIVEM105STUWBX","price":4909.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52268465324314,"sku":"534-BDL-HIVEM105STUWBWDX","price":5222.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52268465389850,"sku":"534-BDL-HIVEM105STUWGDX","price":5084.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52268465422618,"sku":"534-BDL-HIVEM105STUWGX","price":5309.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52268465455386,"sku":"534-BDL-HIVEM105STUWMRX","price":5572.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-mini-sauna-heater-package_0de8c03a-03c9-4424-9e9f-ae0135225b76.jpg?v=1779380854"},{"product_id":"huum-steel-6-0stu-pkg-steel-series-6-0kw-sauna-heater-package","title":"HUUM 6.0STU STEEL Series 6.0kW Sauna Heater Package","description":"\u003c!-- HUUM STEEL 6.0STU Package - 6kW Complete Floor-Standing Sauna Heater, Slim Stainless Tower --\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=Hjqdmj30eVsHwLJD\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM STEEL 6.0STU Pkg STEEL Series 6.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- Floor-standing | 240V\/1PH | 177-318 cu ft | Complete - control + 330 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-STEEL60STULB | STEEL Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- No UKU Extension Box required for 6kW | Air tunnel integrated | Minimal safety clearances --\u003e\u003c!-- Single 30A breaker \/ 10 AWG | 330 lbs (10 boxes) 2-4\" rounded olivine --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 8 document sections: STEEL IOM | STEEL Elements Required | UKU Installation and Operations Manual (plural) | UKU Diagram | UKU Video | Extension Installation Manual | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM STEEL 6.0STU Package is a complete sauna heater package for rooms from 177 to 318 cubic feet, including the STEEL 6kW floor-standing heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 330 lbs of rounded olivine diabase sauna stones. The STEEL is a slender floor-standing tower heater in brushed stainless steel - a different design concept from every other HUUM heater in the range. The DROP is wall-mounted with a water-droplet form. The HIVE and HIVE Mini are open beehive cages with massive stone capacity. The CLIFF has a natural stone exterior surface. The STEEL is a clean, rectangular stainless steel tower - a precisely engineered vertical column that combines a 330-lb stone capacity with exceptionally small safety clearances and an integrated internal air duct, making it the appropriate choice when floor-standing format, large stone mass, and tight wall clearances are all required simultaneously for the 177-318 cu ft room range.\u003c\/p\u003e\n\u003ch4\u003eThe STEEL design - slender stainless tower, minimal clearances, 330 lbs of stone\u003c\/h4\u003e\n\u003cp\u003eThe HUUM STEEL heater is engineered for sauna rooms with limited space where a floor-standing heater needs to fit close to walls without consuming the usable bench and floor area. The safety clearance from surrounding walls at the 6kW output level is just 2\" (5 cm) - among the smallest of any floor-standing electric sauna heater. The slender rectangular tower profile fits naturally against sauna walls without projecting far into the room. Despite this compact, wall-friendly geometry, the STEEL 6 carries 330 lbs of rounded olivine diabase stones - nearly three times the DROP 6's 122-lb wall-mounted stone load - producing the large stone mass that delivers soft, sustained, long-lasting steam from a floor-standing heater on a standard 30A residential circuit. The clean brushed stainless steel exterior suits contemporary sauna interiors with dark wood, slate, or modern material palettes where the heater should read as a precise industrial element rather than an organic or stone-surfaced form.\u003c\/p\u003e\n\u003ch4\u003eSTEEL vs CLIFF vs DROP - three HUUM approaches to the same room range\u003c\/h4\u003e\n\u003cp\u003eFor rooms from 177 to 318 cubic feet, three HUUM heater types are available. The DROP 6kW is wall-mounted with 122 lbs of stones on a 30A \/ 10 AWG circuit - the compact, wall-mounted choice for rooms where floor space is limited and smaller stone mass is acceptable. The CLIFF 6kW is a slender floor-standing tower with a natural stone exterior and 165 lbs of stones on a 30A \/ 10 AWG circuit - the choice when natural stone aesthetics and minimal clearances are the priority. The STEEL 6kW is a slender floor-standing stainless tower with 330 lbs of stones on a 30A \/ 10 AWG circuit - the choice when maximum stone mass in a floor-standing format with minimal clearances is the priority, in a clean stainless steel form. All three run on the same 30A \/ 10 AWG circuit. The decision is mounting type, stone mass, and exterior aesthetic.\u003c\/p\u003e\n\u003ch4\u003eIntegrated air duct - 25% faster heat-up, extended element life\u003c\/h4\u003e\n\u003cp\u003eThe STEEL's integrated internal air duct directs airflow efficiently through the 330-lb stone mass during the warm-up cycle, reducing heat-up time by approximately 25% and extending the life of the heating elements by reducing thermal stress. For a 177-318 cu ft sauna room at 6kW, this means a shorter time from switch-on to bathing temperature. The 10 boxes of 2\"-4\" rounded olivine diabase stones included in this package are the correct type and specification for the STEEL 6. Like all HUUM floor-standing heaters, the STEEL can be partially embedded into a sauna bench using the optional embedding flange for custom installations, and can be fitted with an optional safety railing to prevent contact with the hot heater body.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 6kW floor-standing sauna heater package for rooms from 177 to 318 cubic feet. Includes STEEL 6kW heater, UKU control (Local Black or WiFi - select at checkout), and 330 lbs of rounded olivine diabase stones (10 boxes). Slim stainless steel tower - 2\" safety clearance from walls at 6kW. 330 lbs stone capacity - nearly 3x the DROP 6kW wall-mounted heater. Integrated internal air duct - 25% faster heat-up, extended element life. No UKU Extension Box required. Single 30A breaker, 10 AWG wire - same as DROP 6kW. 240V \/ 1-phase. Adjustable legs. Bench-embedding possible. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 330 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 318 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlim stainless steel tower - floor-standing\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity - 10 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNearly 3x the DROP 6 wall-mounted stone mass\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 30A breaker - 10 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 30A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 10 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical and clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlim rectangular stainless steel tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e2\" (5 cm) at 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eBrushed stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSTEEL vs DROP vs CLIFF at 6kW\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW (this listing)\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | Stainless tower | 330 lbs | 2\" clearance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6kW\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | Water-droplet | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6kW\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | Natural stone surface | 165 lbs | 2\" clearance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom coverage\u003c\/td\u003e\n\u003ctd\u003eAll three: 177-318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElectrical\u003c\/td\u003e\n\u003ctd\u003eAll three: single 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSTEEL series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL Mini 3.5kW\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | 106-212 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 10.5kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 330 lbs + ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM STEEL 6kW floor-standing sauna heater - brushed stainless steel tower\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e330 lbs of 1\" - 2\" (3-5 cm) Round Sauna Stones\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM STEEL safety railing (recommended), STEEL embedding flange (for bench mounting), reflector panels (reduce wall clearances further). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL 6.0STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs of stone on a standard 30A circuit\u003c\/div\u003e\n\u003cp\u003eThe STEEL 6 carries 330 lbs of rounded olivine diabase stones - nearly three times the DROP 6's 122 lbs and twice the CLIFF 6's 165 lbs - on the same standard single 30A \/ 10 AWG circuit. For buyers in the 177-318 cu ft range who want the maximum stone mass available at this output level and circuit specification, the STEEL is the answer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" safety clearance - fits tight spaces\u003c\/div\u003e\n\u003cp\u003eThe STEEL 6 requires only 2\" (5 cm) safety clearance from surrounding walls - the same as the CLIFF 6, and among the smallest of any floor-standing heater at this output. For sauna rooms where wall and bench positioning leaves minimal space for the heater, the STEEL can be placed where wider or more projecting floor-standing heaters cannot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSlim stainless tower - precise industrial aesthetic\u003c\/div\u003e\n\u003cp\u003eThe STEEL's brushed stainless steel rectangular tower reads as a precision industrial object in the sauna room - clean, straight-lined, and modern. For sauna interiors with dark timber, slate, concrete, or contemporary black finishes where the heater should integrate as a precise utilitarian form rather than an organic or stone-surfaced element, the STEEL is the appropriate aesthetic choice in the HUUM floor-standing range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe integrated internal air duct directs airflow efficiently through the 330-lb stone mass, reducing heat-up time by approximately 25% and extending element life. For a 177-318 cu ft room at 6kW, this means reaching bathing temperature sooner. The improved airflow also distributes heat more evenly through the full stone load for consistent steam when water is ladled.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eFloor-standing with bench-embedding option\u003c\/div\u003e\n\u003cp\u003eThe STEEL stands on adjustable legs directly on the sauna floor without wall mounting. The optional embedding flange allows partial installation into the sauna bench for custom built-in looks. The STEEL Mini 3.5kW wall-mounted variant is available separately for rooms where floor space is the constraint rather than wall space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat\u003c\/div\u003e\n\u003cp\u003eUpgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android - remote preheat from anywhere, session scheduling, and temperature monitoring. No UKU Extension Box is required for the 6kW STEEL. For sauna rooms in the 177-318 cu ft range that take 20-35 minutes to reach temperature, the WiFi option removes the need to plan the warm-up in advance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM STEEL 6kW floor-standing sauna heater package with UKU control and 330 lbs olivine stones - slim stainless steel tower\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/SteelPKG1.jpg?v=1779381989\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 6STU. 6kW. 177-318 cu ft. 330 lbs of stone. Slim stainless tower. 2\" from the wall.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL is HUUM's slender stainless steel tower heater - a floor-standing unit engineered for maximum stone mass in minimum footprint at minimal wall clearances. At 6kW covering rooms from 177 to 318 cubic feet, the STEEL 6STU Package delivers 330 lbs of rounded olivine diabase stones and 25% faster heat-up from an integrated air duct, on a standard single 30A \/ 10 AWG residential circuit. The brushed stainless steel exterior suits contemporary sauna interiors where a clean industrial tower aesthetic is preferred. The package includes the STEEL 6kW heater, the UKU control (Local Black or WiFi at checkout), and 10 boxes of the correct rounded olivine stones. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - STEEL 6kW, UKU control, and 330 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW, 177-318 cu ft\u003c\/strong\u003e - single 30A \/ 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e330 lb stone capacity\u003c\/strong\u003e - largest stone mass of any 6kW HUUM on a 30A circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" from walls\u003c\/strong\u003e - minimal clearances for tight sauna room layouts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eSTEEL series - 6kW, 9kW, 10.5kW floor-standing\u003c\/span\u003e\n\u003ch4\u003eSTEEL 6 vs STEEL 9 vs STEEL 10.5 - choosing the right STEEL output\u003c\/h4\u003e\n\u003cp\u003eAll three floor-standing STEEL models share the same slim stainless tower profile, 330-lb stone capacity, integrated air duct, 2\"-4\" (5-10 cm) safety clearances (with 4\" applying to larger models), and adjustable leg installation. STEEL 6kW: 177-318 cu ft, single 30A \/ 10 AWG, no extension box. STEEL 9kW: 318-530 cu ft, single 50A \/ 8 AWG, no extension box. STEEL 10.5kW: 353-706 cu ft, single 50A \/ 8 AWG, UKU Extension Box required. To select the correct output level, calculate the adjusted cubic footage of the sauna room - accounting for cold surfaces such as glass, tile, and masonry panels that increase the effective thermal load. STEEL also offers a wall-mounted Mini 3.5kW model for rooms from 106-212 cu ft. A licensed electrician is required for all installations. No GFI\/GFCI breakers. The optional STEEL safety railing is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM STEEL series showing 6kW 9kW 10.5kW slim stainless tower models with identical profile and different output specifications\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum_uku1_1_28d85d78-f4c9-4671-a5cc-3ba0ce923a07.jpg?v=1779377905\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e STEEL Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e STEEL Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operations Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operations Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL 6.0STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52264121991450,"sku":"534-BDL-STEEL60STULB","price":3895.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52264122024218,"sku":"534-BDL-STEEL60STULB+WD","price":4208.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52264122089754,"sku":"534-BDL-STEEL60STUWB","price":4157.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52264122122522,"sku":"534-BDL-STEEL60STUWB+WD","price":4470.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52264122188058,"sku":"534-BDL-STEEL60STUWGD","price":4332.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52264122220826,"sku":"534-BDL-STEEL60STUWG","price":4557.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52264122253594,"sku":"534-BDL-STEEL60STUWMR","price":4820.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelPKG1.jpg?v=1779381989"},{"product_id":"huum-steel-9-0stu-pkg-steel-series-9-0kw-sauna-heater-package","title":"HUUM STEEL 9.0STU Pkg STEEL Series 9.0kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM STEEL 9.0STU Package - 9kW Complete Floor-Standing Sauna Heater, Slim Stainless Tower --\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=RWRk12iHvghHmb6z\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM STEEL 9.0STU Pkg STEEL Series 9.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- Floor-standing | 240V\/1PH | 318-530 cu ft | Complete - control + 330 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-STEEL90STULB | STEEL Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- No UKU Extension Box required (9kW under 11kW threshold) | Air tunnel integrated --\u003e\u003c!-- Single 50A breaker \/ 8 AWG (heavier than STEEL 6's 30A \/ 10 AWG) --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 8 document sections: STEEL IOM | STEEL Elements Required | UKU Installation and Operation Manual (singular) | UKU Diagram | UKU Video | Extension Installation Manual | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM STEEL 9.0STU Package is a complete sauna heater package for rooms from 318 to 530 cubic feet, including the STEEL 9kW floor-standing heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 330 lbs of rounded olivine diabase sauna stones. The STEEL 9 steps up from the STEEL 6 with 50% more output for the same slender stainless steel tower body and the same 330-lb stone capacity, extending coverage into the 318-530 cu ft room range on a single 50A \/ 8 AWG circuit. No UKU Extension Box is required. The STEEL 9 is the correct choice for buyers in the 318-530 cu ft range who want a floor-standing slender stainless steel tower with 330 lbs of stone mass, minimal 4\" (10 cm) wall clearances, and an integrated air duct - on a single electrical circuit without dual-circuit complexity.\u003c\/p\u003e\n\u003ch4\u003eSTEEL 9 vs STEEL 6 - same body, more output, heavier circuit\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 6 and STEEL 9 share identical body dimensions - the same slim rectangular stainless steel tower profile, the same 330-lb stone capacity, and the same integrated internal air duct. What changes is output level, room range, and electrical specification. The STEEL 6 covers 177-318 cu ft on a single 30A \/ 10 AWG circuit with 2\" (5 cm) wall clearances. The STEEL 9 covers 318-530 cu ft on a single 50A \/ 8 AWG circuit with 4\" (10 cm) wall clearances - slightly more than the 6kW model due to the higher output level, but still exceptionally minimal for a 9kW floor-standing heater. For rooms from 318 to 530 cu ft where a single-circuit 50A installation is available, the STEEL 9 is the directly matched output level. No dual-circuit wiring is needed, and no UKU Extension Box is required.\u003c\/p\u003e\n\u003ch4\u003e318-530 cu ft - mid-size sauna rooms in the STEEL tower form\u003c\/h4\u003e\n\u003cp\u003eThe 9kW room range covers mid-size dedicated home sauna rooms, two-bench sauna cabins, and smaller commercial installations. At this range, the STEEL 9's floor-standing format and minimal 4\" clearances are especially valuable in sauna rooms where bench positions leave limited space between the heater location and the walls - a common constraint in purpose-built sauna cabins where the bench wraps around three walls and the heater must fit into a corner or end position without violating safety distances. The STEEL's slim rectangular profile takes up less floor space than round floor-standing heaters like the HIVE Mini, and its 4\" wall clearance at 9kW is far less than the safety distances required by most comparable heaters at this output level.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stone, integrated air duct - the STEEL's consistent specification\u003c\/h4\u003e\n\u003cp\u003eLike the STEEL 6, the STEEL 9 carries 330 lbs of rounded olivine diabase stones in 2\"-4\" (5-10 cm) size - the correct specification for the STEEL basket geometry. All 10 boxes of stones included in this package are the right type and quantity for the STEEL 9. The integrated internal air duct reduces heat-up time by approximately 25% and extends element life by improving airflow through the stone mass during warm-up. The UKU Local Black control is included as standard; UKU WiFi is available at checkout for HUUM app remote preheat and scheduling on iOS and Android. The STEEL 9 does not require the UKU Extension Box - that component is only needed for the STEEL 10.5kW model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 9kW floor-standing sauna heater package for rooms from 318 to 530 cubic feet. Includes STEEL 9kW heater, UKU control (Local Black or WiFi - select at checkout), and 330 lbs of rounded olivine diabase stones (10 boxes). Same slim stainless steel tower body as STEEL 6 and 10.5 - 330 lbs stone capacity across all three. 4\" safety clearance from walls at 9kW. Integrated internal air duct - 25% faster heat-up, extended element life. No UKU Extension Box required. Single 50A breaker, 8 AWG wire. 240V \/ 1-phase. Adjustable legs. Bench-embedding possible. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 330 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 530 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlim stainless steel tower - same body as STEEL 6 and 10.5\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e4\" safety clearance from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity - 10 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 530 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 10 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical and clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlim rectangular stainless steel tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e4\" (10 cm) at 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eBrushed stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSTEEL series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 2\" clearance | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 9kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 4\" clearance | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 10.5kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 4\" clearance | Ext box required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all three STEEL models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs - identical across all three\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eSlim brushed stainless steel tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM STEEL 9kW floor-standing sauna heater - brushed stainless steel tower\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRounded olivine diabase sauna stones - 10 boxes (330 lbs)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM STEEL safety railing (recommended), STEEL embedding flange (for bench mounting), reflector panels (reduce wall clearances further). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL 9.0STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs of stone for 318-530 cu ft rooms\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 delivers 330 lbs of rounded olivine diabase stone mass for rooms from 318 to 530 cubic feet - the same stone capacity as the STEEL 6 for a meaningfully larger room range. More stone mass relative to output means softer, sustained steam and consistent bathing temperature through the session. For rooms in this range, the STEEL 9 is the maximum stone mass available without stepping up to a dual-circuit installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e4\" from walls - fits tight sauna layouts\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 requires only 4\" (10 cm) safety clearance from surrounding walls - minimal for a 9kW floor-standing heater. In sauna rooms where bench positions or structural constraints limit the available space around the heater position, the STEEL's slim rectangular profile and small clearances allow placement that wider or more projecting heaters at this output level cannot achieve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame body as STEEL 6 and 10.5\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 is physically identical to the STEEL 6 and STEEL 10.5 - same slim stainless tower profile, same 330-lb stone capacity, same adjustable legs, same embedded flange compatibility. The heater footprint and installation procedure are the same regardless of output level within the STEEL floor-standing series. More output for a larger room does not mean a larger heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSingle circuit - no extension box\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9kW operates on a single 50A \/ 8 AWG circuit with no UKU Extension Box. A single-circuit installation is simpler to plan and wire than the dual-circuit configuration of the HIVE 12kW and above. The UKU Extension Box is only required for the STEEL 10.5kW. For rooms from 318-530 cu ft, the STEEL 9 achieves full output on a single standard electrical circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe integrated internal air duct reduces heat-up time by approximately 25% and extends element life. For a 318-530 cu ft room at 9kW, the time saving is meaningful - particularly for regular sauna users and light commercial installations where session frequency makes warm-up time a practical consideration. Elements also last longer when airflow is optimised through the stone mass from the start of each cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a mid-size sauna\u003c\/div\u003e\n\u003cp\u003eA 318-530 cu ft room at 9kW takes 30-45 minutes to reach bathing temperature. Upgrading to UKU WiFi at checkout adds HUUM app control - start the preheat before leaving work, set a recurring weekly schedule, and monitor temperature remotely. No extension box is required. The WiFi upgrade connects directly to the UKU control without additional hardware for the 9kW model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/SteelPKG1.jpg?v=1779381989\u0026amp;width=800\" alt=\"HUUM STEEL 9kW floor-standing sauna heater package with UKU control and 330 lbs olivine stones - slim stainless steel tower\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 9STU. 9kW. 318-530 cu ft. 330 lbs of stone. Slim tower. 4\" from the wall. Single 50A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL 9STU Package steps up from the STEEL 6 with 50% more output in the same slim stainless tower body for rooms from 318 to 530 cubic feet. The package includes the STEEL 9kW heater with integrated air duct, the UKU control (Local Black or WiFi at checkout), and 10 boxes of rounded olivine diabase stones (330 lbs). No UKU Extension Box required. Single 50A \/ 8 AWG circuit. 4\" safety clearance from walls. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - STEEL 9kW, UKU control, and 330 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-530 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame slim tower body\u003c\/strong\u003e as STEEL 6 and 10.5 - 330 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - single-circuit installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\" from walls\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eSTEEL 6 vs 9 vs 10.5 - choosing the right output\u003c\/span\u003e\n\u003ch4\u003eWhich STEEL floor-standing model is right - 6kW, 9kW, or 10.5kW?\u003c\/h4\u003e\n\u003cp\u003eAll three floor-standing STEEL models share the same slim stainless tower, 330-lb stone capacity, integrated air duct, and adjustable legs. STEEL 6kW: 177-318 cu ft, single 30A \/ 10 AWG, 2\" wall clearance, no extension box. STEEL 9kW: 318-530 cu ft, single 50A \/ 8 AWG, 4\" wall clearance, no extension box. STEEL 10.5kW: 353-706 cu ft, single 50A \/ 8 AWG, 4\" wall clearance, UKU Extension Box required (included in that package). The 9 and 10.5 share the same electrical specification - the difference between them is room size and the extension box requirement. For rooms below 354 cu ft with standard insulation, the 9kW is the correct and more efficiently sized choice. For rooms from 531-706 cu ft or rooms with significant cold surfaces pushing adjusted footage above 530, the 10.5kW is required. A licensed electrician is required for all installations. No GFI\/GFCI. STEEL safety railing recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum_uku1_1_28d85d78-f4c9-4671-a5cc-3ba0ce923a07.jpg?v=1779377905\u0026amp;width=800\" alt=\"HUUM STEEL 9kW slim stainless tower showing same profile as 6kW and 10.5kW models with 50A electrical specification\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM STEEL Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM STEEL Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL 9.0STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52264457699610,"sku":"534-BDL-STEEL90STULB","price":4086.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52264457732378,"sku":"534-BDL-STEEL90STULB+WD","price":4399.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52264457797914,"sku":"534-BDL-STEEL90STUWB","price":4348.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52264457830682,"sku":"534-BDL-STEEL90STUWB+WD","price":4661.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52264457896218,"sku":"534-BDL-STEEL90STUWGD","price":4523.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52264457928986,"sku":"H2004032","price":4748.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52264457961754,"sku":"534-BDL-STEEL90STUWMR","price":5011.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelPKG1.jpg?v=1779381989"},{"product_id":"huum-steel-mini-3-5stu-pkg-steel-mini-series-3-5kw-sauna-heater-package","title":"HUUM STEEL Mini 3.5STU Pkg STEEL Mini Series 3.5kW Sauna Heater Package","description":"\u003c!-- HUUM STEEL Mini 3.5STU Package - 3.5kW Wall-Mounted Compact Sauna Heater --\u003e\u003c!-- Wall-mounted | 240V\/1PH | 106-177 cu ft | Complete - control + 133 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-STEELM35STULB | STEEL Mini Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- Wall-mounted (unlike STEEL 6\/9\/10.5 which are floor-standing) | 2.5\" safety clearance --\u003e\u003c!-- Single 20A breaker \/ 12 AWG | 133 lbs (4 boxes) 2-4\" rounded olivine | No ext box required --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 8 document sections: STEEL IOM | STEEL Elements Required | UKU Installation and Operation Manual (singular) | UKU Diagram | UKU Video | Extension Installation Manual | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=LtMMIpS0N172V-ma\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM STEEL Mini 3.5STU Pkg STEEL Mini Series 3.5kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM STEEL Mini 3.5STU Package is a complete sauna heater package for small sauna rooms from 106 to 177 cubic feet, including the STEEL Mini 3.5kW heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 133 lbs of rounded olivine diabase sauna stones. The STEEL Mini is the wall-mounted member of the STEEL family - an important distinction from the floor-standing STEEL 6, 9, and 10.5kW models. While the full STEEL series stands on the sauna floor on adjustable legs, the STEEL Mini mounts on the sauna wall with a bracket, taking no floor space at all. At 3.5kW on a standard 20A \/ 12 AWG circuit, it is designed specifically for the smallest sauna rooms - personal home saunas, single-bench rooms, compact barrel saunas, and tight custom builds where a 30A or 50A circuit is impractical and floor space is the limiting constraint.\u003c\/p\u003e\n\u003ch4\u003eWall-mounted - the STEEL aesthetic in a compact wall-bracket format\u003c\/h4\u003e\n\u003cp\u003eThe STEEL Mini brings the slender stainless steel profile and minimal safety clearance engineering of the STEEL family to a wall-mounted format suited for rooms from 106 to 177 cubic feet. Like the full STEEL models, the STEEL Mini has a slim rectangular brushed stainless steel profile, an integrated internal air duct for 25% faster heat-up, and direct stone-to-element contact for efficient heat transfer. The safety clearance from surrounding walls is 2.5\" (5 cm) - even tighter than the STEEL 6's 2\" clearance for a floor-standing unit, making the STEEL Mini one of the most space-efficient wall-mounted electric sauna heaters available at this output level. In a 106-177 cu ft sauna room where every inch of bench and floor space matters, the wall-mounted installation keeps the floor completely clear for the bather.\u003c\/p\u003e\n\u003ch4\u003e133 lbs of stone on a 20A circuit - generous stone mass for a small room heater\u003c\/h4\u003e\n\u003cp\u003eDespite its compact wall-mounted form for small rooms, the STEEL Mini carries 133 lbs of rounded olivine diabase stones - substantially more than a standard wall-mounted heater in this output class. For comparison, the HUUM DROP 4.5kW (the closest DROP model for this room range) carries 122 lbs on a 30A \/ 10 AWG circuit; the STEEL Mini carries 133 lbs on a lighter 20A \/ 12 AWG circuit. The additional stone mass, combined with direct stone-to-element contact, produces softer and longer-lasting steam from a heater that runs on a standard 20A circuit - the lightest electrical requirement of any HUUM heater. For new sauna installations in homes where panel capacity is limited, the STEEL Mini's 20A requirement makes it the most electrically accessible floor-heating HUUM option.\u003c\/p\u003e\n\u003ch4\u003e20A \/ 12 AWG - the lightest electrical requirement in the HUUM range\u003c\/h4\u003e\n\u003cp\u003eThe STEEL Mini 3.5kW requires a single 20A two-pole breaker and 12 AWG wire - lighter than any other HUUM heater in the range. The DROP 4.5kW and 6kW, the HIVE Mini 6kW, and the STEEL 6kW all require a minimum 30A circuit; the STEEL Mini is the one HUUM heater that can run on a 20A circuit, making it the correct choice when panel capacity is the binding constraint for a small sauna room. A licensed electrician is required for all connections. Do not connect to a GFI\/GFCI breaker. No UKU Extension Box is required for the 3.5kW output level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 3.5kW wall-mounted sauna heater package for small rooms from 106 to 177 cubic feet. Includes STEEL Mini 3.5kW heater, UKU control (Local Black or WiFi - select at checkout), and 133 lbs of rounded olivine diabase stones (4 boxes). Wall-mounted - no floor space used. Slender brushed stainless steel profile. 2.5\" safety clearance from walls. 133 lbs stone capacity - generous for a small-room wall-mounted heater. Direct stone-to-element contact. Integrated air duct - 25% faster heat-up. No UKU Extension Box required. Single 20A breaker, 12 AWG wire - lightest electrical requirement in the HUUM range. 240V \/ 1-phase. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 133 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e3.5 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e106 to 177 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWall-mounted - no floor space used\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlender brushed stainless steel profile\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2.5\" safety clearance from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e133 lb stone capacity - 4 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDirect stone-to-element contact\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 20A breaker - 12 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eLightest electrical requirement in HUUM range\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e3.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e14.58 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 20A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e12 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 3.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e106 to 177 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e133 lbs (4 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 4 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical and clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlim rectangular stainless steel - wall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e2.5\" (5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eWall-mounted with bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eDirect stone-to-element contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eBrushed stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 3.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSTEEL Mini vs STEEL 6 - key differences\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL Mini 3.5kW (this listing)\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | 106-177 cu ft | 20A \/ 12 AWG | 133 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | 177-318 cu ft | 30A \/ 10 AWG | 330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting type\u003c\/td\u003e\n\u003ctd\u003eWall bracket vs adjustable floor legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit\u003c\/td\u003e\n\u003ctd\u003e20A (Mini) vs 30A (STEEL 6) - lightest in HUUM range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eSlim brushed stainless steel - wall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM STEEL Mini 3.5kW wall-mounted sauna heater - brushed stainless steel\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRounded olivine diabase sauna stones - 4 boxes (133 lbs)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eWall-mount bracket and hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM STEEL Mini safety railing (recommended), reflector panels (reduce wall clearances further). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL Mini 3.5STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eWall-mounted - zero floor space\u003c\/div\u003e\n\u003cp\u003eThe STEEL Mini mounts on the sauna wall with a bracket, keeping the entire floor area free for the bather. In small sauna rooms from 106-177 cu ft - a single-bench personal sauna or compact two-person room - every square foot of floor and bench space matters. The wall-mounted installation eliminates the heater footprint from the floor entirely, which is not possible with any floor-standing HUUM model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2.5\" from the wall - smallest clearance in the STEEL series\u003c\/div\u003e\n\u003cp\u003eThe STEEL Mini requires only 2.5\" (5 cm) safety clearance from surrounding walls - the smallest wall clearance of any HUUM heater. In compact sauna rooms where the distance from the ideal heater position to the nearest wall or bench is severely constrained, the STEEL Mini can be positioned where no other heater can fit without violating safety distances.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e20A \/ 12 AWG - lightest electrical requirement in the HUUM range\u003c\/div\u003e\n\u003cp\u003eThe STEEL Mini 3.5kW requires a 20A two-pole breaker and 12 AWG wire - lighter than every other HUUM heater. The DROP 4.5, DROP 6, HIVE Mini 6, and STEEL 6 all require at minimum 30A \/ 10 AWG. For small sauna rooms in homes where the panel has limited capacity, the STEEL Mini's 20A requirement is the most electrically accessible path to a complete HUUM installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e133 lbs of stone - generous for a small-room wall-mounted heater\u003c\/div\u003e\n\u003cp\u003eDespite its compact wall-mounted format for rooms as small as 106 cu ft, the STEEL Mini carries 133 lbs of rounded olivine diabase stones - more than the 122 lbs in the DROP 4.5kW on a heavier 30A circuit. Direct stone-to-element contact ensures efficient heat transfer through the full stone load, producing soft, consistent steam when water is ladled.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe integrated internal air duct reduces heat-up time by approximately 25% and extends element life by directing airflow efficiently through the stone mass. For a 106-177 cu ft room at 3.5kW, the shorter heat-up time means less waiting between switch-on and bathing temperature - a meaningful quality-of-life improvement for regular sauna users.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a compact sauna\u003c\/div\u003e\n\u003cp\u003eUpgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android - remote preheat from anywhere, session scheduling, and temperature monitoring. A 106-177 cu ft room at 3.5kW heats up in 15-25 minutes; the WiFi option allows starting the preheat from anywhere so the sauna is ready when the bather arrives. No extension box required for the WiFi upgrade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"HUUM STEEL Mini 3.5kW wall-mounted sauna heater package with UKU control and 133 lbs olivine stones - slim stainless bracket mount\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-11\/SteelMiniPKG1_0.jpg\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL Mini 3.5STU. 3.5kW. 106-177 cu ft. Wall-mounted. 133 lbs of stone. 20A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL Mini is the wall-mounted entry point of the STEEL series - the same slim stainless steel profile and minimal clearance engineering as the floor-standing STEEL models, in a compact wall-bracket format for rooms from 106 to 177 cubic feet on a 20A \/ 12 AWG circuit. The STEEL Mini 3.5STU Package includes the heater, the UKU control (Local Black or WiFi at checkout), and 4 boxes of rounded olivine diabase stones (133 lbs). No UKU Extension Box required. No floor space used. 2.5\" from the wall. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - STEEL Mini 3.5kW, UKU control, and 133 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5kW, 106-177 cu ft\u003c\/strong\u003e - single 20A \/ 12 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall-mounted\u003c\/strong\u003e - zero floor space, 2.5\" from walls\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLightest electrical requirement\u003c\/strong\u003e in the HUUM range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eSTEEL Mini vs STEEL 6 vs DROP 4.5 - choosing for small rooms\u003c\/span\u003e\n\u003ch4\u003eSmall sauna room options - STEEL Mini 3.5, DROP 4.5, and STEEL 6\u003c\/h4\u003e\n\u003cp\u003eFor sauna rooms from 106-177 cu ft, the STEEL Mini 3.5kW is the specific HUUM choice: wall-mounted, 20A circuit, 133 lbs stones, 2.5\" clearance. For rooms from 106-248 cu ft where a 30A circuit is available and wall-mounted is preferred, the DROP 4.5kW offers 122 lbs stones in a water-droplet form. For rooms from 177-318 cu ft where floor-standing is preferred and 30A is available, the STEEL 6kW floor-standing offers 330 lbs stones in the same stainless tower aesthetic as the STEEL Mini. The STEEL Mini is the correct choice specifically when the room is 177 cu ft or smaller, a 20A circuit is preferred or required, and a wall-mounted installation is wanted - no other HUUM heater satisfies all three simultaneously. A licensed electrician is required. No GFI\/GFCI. STEEL Mini safety railing recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM STEEL Mini 3.5kW wall-mounted in small sauna showing slim stainless profile with zero floor footprint\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum_uku1_1_28d85d78-f4c9-4671-a5cc-3ba0ce923a07.jpg?v=1779377905\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e STEEL Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e STEEL Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL Mini 3.5STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52269962756378,"sku":"534-BDL-STEELM35STULB","price":2958.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52269962789146,"sku":"534-BDL-STEELM35STULB+WD","price":3063.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52269962821914,"sku":"534-BDL-STEELM35STULB+WH","price":2974.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52269962854682,"sku":"534-BDL-STEELM35STUWB","price":3220.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52269962887450,"sku":"534-BDL-STEELM35STUWB+WD","price":3481.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52269962920218,"sku":"534-BDL-STEELM35STUWB+WH","price":3392.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52269962952986,"sku":"534-BDL-STEELM35STUWGD","price":3395.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52269962985754,"sku":"534-BDL-STEELM35STUWG","price":3620.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52269963018522,"sku":"534-BDL-STEELM35STUWMR","price":3883.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelMiniPKG1_0.jpg?v=1779508652"},{"product_id":"huum-uku-mirror-sauna-heater-control-with-additional-accessories","title":"HUUM UKU Mirror Sauna Heater Control with Additional Accessories","description":"\u003cp\u003e\u003c!-- HUUM UKU Mirror - WiFi Sauna Control with Mirrored Glass Panel --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=GveeC7sZuwnloy66\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM UKU Mirror Sauna Heater Control with Wi-Fi, Digital On\/Off, Time,Temp, Mirror\u003c\/h2\u003e\n\u003c!-- SKU: 536-BDL-UKU-WIFI-MIRROR | Built-in WiFi | Up to 11kW direct, 18kW with Extension Box --\u003e\u003c!-- Works with different manufacturers heaters | Recessed or surface-mounted | Made in Estonia --\u003e\u003c!-- 4 document sections: Installation \u0026 Operation Manual (ampersand) | Install Diagram | Installation Video | Warranty --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM UKU Mirror is a WiFi sauna control with a genuine mirrored glass panel - a premium aesthetic upgrade to the standard UKU Local Black and UKU Local Wood controls. The mirrored glass surface gives the control panel the visual character of a luxury bathroom accessory rather than a utility switch, integrating naturally into high-finish sauna rooms with glass, stone, and reflective surfaces. All UKU control functions are available both on the panel and remotely through the HUUM app on iOS or Android. The UKU Mirror operates heaters up to 11kW without additional hardware; heaters from 11kW to 18kW require the UKU Extension Box (sold separately). The UKU Mirror is compatible with sauna heaters from different manufacturers - not exclusively HUUM heaters.\u003c\/p\u003e\n\u003ch4\u003eGenuine mirrored glass panel - premium aesthetics in the sauna room\u003c\/h4\u003e\n\u003cp\u003eThe UKU Mirror is the design-forward member of the UKU Glass family. Where the UKU Local Black and UKU Local Wood controls suit traditional sauna interiors, the Mirror panel is designed for contemporary sauna rooms where reflective, glass, and metallic surfaces define the aesthetic. The mirrored glass face reflects the sauna interior when idle and displays the control interface - temperature, time, and session status - when active. The panel can be installed recessed into the wall for a flush, seamless appearance, or surface-mounted with the optional UKU Frame bezel (sold separately) for a more prominent panel presentation. Both installation methods are described in the Install Diagram in the documents section below.\u003c\/p\u003e\n\u003ch4\u003eFull UKU WiFi functions - remote preheat, scheduling, safety\u003c\/h4\u003e\n\u003cp\u003eThe UKU Mirror includes the complete HUUM UKU WiFi feature set. From the HUUM app on iOS or Android, the sauna can be turned on or off from anywhere, the target temperature can be set between 122°F and 230°F (50-110°C), a delayed start can be programmed up to 48 hours in advance, and the current sauna temperature can be monitored in real time. A notification is sent to the phone when the sauna reaches the set temperature. Unlimited users can be connected to the same sauna through the HUUM app - a useful feature for families or households with multiple regular sauna users. The panel supports 8 languages: English, Estonian, German, Russian, Italian, Finnish, Polish, and French. Safety features include overheating protection (automatic shutoff at approximately 266°F \/ 130°C), a door sensor that prevents remote starting when the sauna door is open, and a child safety lock.\u003c\/p\u003e\n\u003ch4\u003eCompatible with different heater brands - up to 18kW with Extension Box\u003c\/h4\u003e\n\u003cp\u003eThe UKU Mirror is not limited to HUUM heaters - it is compatible with electric sauna heaters from different manufacturers, provided the heater's electrical specification is within the UKU's supported range. Without the Extension Box, the UKU Mirror controls heaters up to 11kW directly. For heaters from 11kW to 18kW - including all HUUM heaters over 11kW - the UKU Extension Box (sold separately) is required. The lighting, ventilation, and steamer accessory connections allow the UKU Mirror to control these sauna room elements alongside the heater from the same panel and app interface. The sauna heater is sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eWiFi sauna control with genuine mirrored glass panel. Compatible with sauna heaters from different manufacturers up to 11kW direct, up to 18kW with UKU Extension Box (sold separately). HUUM app - iOS and Android - remote on\/off, temperature 122-230°F, delayed start up to 48 hours, live temperature monitoring, notification when ready. Unlimited users. 8 languages. Safety: overheat protection (266°F shutoff), door sensor, child safety lock. Controls lighting, ventilation, and steamer accessories. Recessed or surface-mounted. 5-year warranty. Made in Estonia by HUUM. Sauna heater sold separately.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eGenuine mirrored glass panel\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBuilt-in WiFi - HUUM app iOS and Android\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUp to 11kW direct \/ 18kW with Extension Box\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompatible with different heater brands\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemote on\/off and temperature control\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122-230°F temperature range\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDelayed start up to 48 hours\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNotification when sauna is ready\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUnlimited users\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e8 languages\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eLighting, ventilation, steamer connections\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRecessed or surface-mounted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOverheat protection, door sensor, child lock\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty - made in Estonia\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHeater compatibility\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDirect (no extension box)\u003c\/td\u003e\n\u003ctd\u003eUp to 11 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith UKU Extension Box\u003c\/td\u003e\n\u003ctd\u003e11 kW to 18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible heater brands\u003c\/td\u003e\n\u003ctd\u003eDifferent manufacturers - not HUUM-only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSauna heater included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHUUM app functions\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (free)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote on\/off\u003c\/td\u003e\n\u003ctd\u003eYes - from anywhere\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e122-230°F (50-110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelayed start\u003c\/td\u003e\n\u003ctd\u003eUp to 48 hours in advance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature monitoring\u003c\/td\u003e\n\u003ctd\u003eLive current temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReady notification\u003c\/td\u003e\n\u003ctd\u003eYes - push notification when set temperature reached\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsers\u003c\/td\u003e\n\u003ctd\u003eUnlimited per sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePanel and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePanel surface\u003c\/td\u003e\n\u003ctd\u003eGenuine mirrored glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation options\u003c\/td\u003e\n\u003ctd\u003eRecessed (flush) or surface-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional bezel\u003c\/td\u003e\n\u003ctd\u003eUKU Frame - sold separately for surface mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLanguages\u003c\/td\u003e\n\u003ctd\u003eEnglish, Estonian, German, Russian, Italian, Finnish, Polish, French (8 total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory connections\u003c\/td\u003e\n\u003ctd\u003eLighting, ventilation, steamer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety features\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverheat protection\u003c\/td\u003e\n\u003ctd\u003eAuto-shutoff at approximately 266°F (130°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor sensor\u003c\/td\u003e\n\u003ctd\u003ePrevents remote start when sauna door is open\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChild safety lock\u003c\/td\u003e\n\u003ctd\u003eYes - prevents accidental activation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e536-BDL-UKU-WIFI-MIRROR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Mirror WiFi control panel with genuine mirrored glass surface\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eMain control module\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eTemperature sensor\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eDoor sensor\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eSold separately (not included):\u003c\/strong\u003e Sauna heater; UKU Extension Box (required for heaters over 11kW up to 18kW); UKU Frame bezel (for surface-mounted installation). \u003cstrong\u003eFree:\u003c\/strong\u003e HUUM app - download from App Store or Google Play.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM UKU Mirror stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eGenuine mirrored glass - premium panel aesthetic\u003c\/div\u003e\n\u003cp\u003eThe UKU Mirror panel is made of genuine glass with a mirrored surface - not a mirror-finish plastic. In high-finish sauna rooms with glass partitions, stone tile, or metallic hardware, the mirrored glass panel integrates as a designed element rather than a utility control. It can be recessed flush into the wall for maximum integration or surface-mounted with the optional UKU Frame bezel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRemote preheat - sauna ready when you arrive\u003c\/div\u003e\n\u003cp\u003eTurn the sauna on from the HUUM app before leaving work, set a delayed start for a specific time, or monitor the current temperature from anywhere. A push notification arrives when the sauna reaches the set temperature - no need to check the app. Unlimited users means every member of the household can control and monitor the sauna from their own phone without sharing credentials.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCompatible with different heater brands\u003c\/div\u003e\n\u003cp\u003eThe UKU Mirror is not restricted to HUUM heaters. It works with electric sauna heaters from multiple manufacturers within the supported load range. For existing sauna installations with a non-HUUM heater where WiFi app control is the goal, the UKU Mirror can often be used as a control upgrade without replacing the heater - confirm heater compatibility before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eLighting, ventilation, and steamer control\u003c\/div\u003e\n\u003cp\u003eAccessory connections allow sauna lighting, ventilation, and an optional steamer to be controlled from the same UKU Mirror panel and HUUM app interface as the heater. One control system manages the complete sauna environment - not just the heater - from both the panel and remotely from the phone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSafety: overheat, door sensor, child lock\u003c\/div\u003e\n\u003cp\u003eOverheating protection automatically shuts down the heater if the sauna temperature exceeds approximately 266°F (130°C). The door sensor prevents the HUUM app from remotely starting the heater if the sauna room door is open - a safety requirement for unattended remote starts. The child safety lock prevents accidental activation of the heater from the panel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUp to 18kW with Extension Box\u003c\/div\u003e\n\u003cp\u003eThe UKU Mirror controls heaters up to 11kW directly. For larger HUUM heaters (HIVE 12kW, 15kW, 18kW; HIVE Mini 10.6kW; CLIFF 11kW; STEEL 10.5kW) that require the UKU Extension Box, the Mirror panel works with the extension box in exactly the same way as the UKU Local controls - the Extension Box is purchased and installed separately alongside the heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-01\/UKU-mirror-Wi-Fi-App-500x500.jpg\" alt=\"HUUM UKU Mirror WiFi sauna control panel with genuine mirrored glass surface and HUUM mobile app display\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - 5-year warranty\u003c\/span\u003e\n\u003ch4\u003eHUUM UKU Mirror. Genuine mirrored glass. Full WiFi app control. Compatible with different heater brands.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The UKU Mirror is the premium panel variant in the UKU WiFi control family - the same HUUM app connectivity, temperature range, safety features, and heater compatibility as the UKU Local Black and UKU Local Wood, with a genuine mirrored glass panel for sauna rooms where the control is as much a design element as a functional component. The UKU Mirror controls heaters up to 11kW directly and up to 18kW with the UKU Extension Box (sold separately). Compatible with different manufacturers' heaters. Sauna heater sold separately. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine mirrored glass panel\u003c\/strong\u003e - recessed or surface-mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHUUM app WiFi\u003c\/strong\u003e - iOS and Android - remote preheat, scheduling, monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 11kW direct\u003c\/strong\u003e \/ up to 18kW with UKU Extension Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with different heater brands\u003c\/strong\u003e - not HUUM-only\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e5-year warranty, made in Estonia\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation \u0026amp; Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation \u0026amp; Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstall Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/UKU%20Glass.Mirro%20Install%20Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Install Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM UKU Mirror is covered by HUUM's \u003cstrong\u003e5-year warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover damage caused by improper installation, use outside of the specified heater load range, or failure to use the UKU Extension Box when required for heaters over 11kW. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Mirror","offer_id":52271029223706,"sku":"536-BDL-UKU-WIFI-MIRROR","price":1837.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/UKU-mirror-Wi-Fi-App-500x500.jpg?v=1779511554"},{"product_id":"huum-cliff-6stu-pkg-cliff-series-6kw-sauna-heater-package","title":"HUUM CLIFF 6STU Pkg CLIFF Series 6kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM CLIFF 6STU Package - 6kW Complete Floor-Standing Sauna Heater, Natural Stone Surface --\u003e\u003c!-- Floor-standing | 240V\/1PH | 177-318 cu ft | Complete - control + 165 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-CLIFF60STULB | CLIFF Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- No UKU Extension Box required (6kW under 11kW threshold) | Air duct integrated | Removable ribs --\u003e\u003c!-- Single 30A breaker \/ 10 AWG | 165 lbs (5 boxes) 1-2\" rounded olivine | Minimal clearances --\u003e\u003c!-- Red Dot Award winner | 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 7 document sections: CLIFF IOM | CLIFF Elements Required | UKU IOM | UKU Diagram | UKU Video | Extension Installation Manual | Warranty | Stone Requirements --\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=9Jp3q6NLO2SOIPWE\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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line-height: 1.5 !important; }\n  .sl-inc-item::before { content: \"\"; position: absolute; left: 4px; top: 16px; width: 6px; height: 6px; border-radius: 50%; background: #2563a8; }\n  .sl-feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }\n  .sl-feat { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 0.9rem 1rem; }\n  .sl-feat-title { font-weight: 700 !important; color: #0f172a !important; margin-bottom: 6px; display: flex; align-items: center; gap: 7px; line-height: 1.3; }\n  .sl-feat-title::before { content: \"\"; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; flex-shrink: 0; }\n  .sl-feat p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.6 !important; margin: 0; font-size: 14px; }\n  .sl-brand1, .sl-brand2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; padding: 1.5rem 0; }\n  .sl-brand-img { width: 100%; height: auto; border-radius: 8px; display: block; }\n  .sl-brand-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: #2563a8; background: #e8f0fa; border: 1px solid #bfd4ef; border-radius: 4px; padding: 4px 10px; margin-bottom: 0.75rem; }\n  .sl-brand1 h4, .sl-brand2 h4 { font-size: 22px !important; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.75rem; line-height: 1.3 !important; }\n  .sl-brand1 p, .sl-brand2 p { font-weight: 500 !important; line-height: 1.75 !important; color: #0f172a !important; margin: 0 0 0.9rem; }\n  .sl-brand1 p:last-child, .sl-brand2 p:last-child { margin: 0; }\n  .sl-check { list-style: none; padding: 0; margin: 1rem 0 0; }\n  .sl-check li { font-weight: 500 !important; line-height: 1.6 !important; color: #0f172a !important; padding: 10px 0 10px 22px; position: relative; border-bottom: 1px solid #e2e8f0; }\n  .sl-check li:last-child { border-bottom: none; }\n  .sl-check li::before { content: \"\"; position: absolute; left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-green { background: #f0fdf4; border: 1px solid #86efac; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #14532d !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM CLIFF 6STU Pkg CLIFF Series 6kW Sauna Heater Package\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CLIFF 6STU Package is a complete sauna heater package for rooms from 177 to 318 cubic feet, including the CLIFF 6kW floor-standing heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 165 lbs of rounded olivine diabase sauna stones (5 boxes). The CLIFF 6 is the entry model in the CLIFF floor-standing series - the same Red Dot Award-winning natural stone surface exterior, the same slender tower profile, the same integrated air duct, and the same removable stone basket ribs as the CLIFF 9 and CLIFF 11, now for the smaller 177-318 cu ft room range on a standard 30A \/ 10 AWG residential circuit. No UKU Extension Box is required at 6kW. The CLIFF 6 is the most electrically accessible model in the CLIFF floor-standing series.\u003c\/p\u003e\n\u003ch4\u003eNatural stone surface - the CLIFF aesthetic at 6kW\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF heater is distinguished from every other HUUM model by its natural stone exterior surface - not a stone-textured coating, but actual natural stone panels that cover the slender tower body and give the heater the visual character of a Nordic cliff face. The Red Dot Award-winning design principle is that the heater should be a stone element in the sauna room, not an appliance. This aesthetic is fully present at 6kW: the same natural stone exterior, the same slim rectangular profile, and the same minimal wall clearances as the larger CLIFF models, now in the output range appropriate for rooms from 177 to 318 cubic feet. For buyers who want the CLIFF's distinctive look in a smaller sauna room - a personal home sauna, a single-bench cabin, or a compact two-person room - the CLIFF 6STU Package delivers it on a standard 30A circuit.\u003c\/p\u003e\n\u003ch4\u003e165 lbs of stone and removable ribs - the CLIFF basket design\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 6 carries 165 lbs (5 boxes) of rounded olivine diabase stones in 1\"-2\" (3-5 cm) size - the CLIFF-specific smaller stone specification that fits the narrow tower basket geometry. This smaller stone size is different from the 2\"-4\" stones used in the DROP, HIVE, and STEEL series. Using oversized stones in the CLIFF basket restricts airflow and can damage the heating elements. The 5 boxes of 1\"-2\" rounded olivine included in this package are the correct specification. The removable basket ribs make loading 165 lbs of stones into the narrow CLIFF tower more practical - the ribs can be removed to access the basket interior for precise stone placement, then reinstalled. The integrated internal air duct speeds up heating by approximately 25% by directing airflow efficiently through the stone mass from switch-on.\u003c\/p\u003e\n\u003ch4\u003eCLIFF 6 vs DROP 6 vs STEEL 6 vs HIVE Mini 6 - the 177-318 cu ft choice\u003c\/h4\u003e\n\u003cp\u003eFour HUUM heaters cover the 177-318 cu ft room range on a 30A \/ 10 AWG circuit. The DROP 6 is wall-mounted with 122 lbs of stones in a water-droplet form. The STEEL 6 is a floor-standing brushed stainless tower with 330 lbs of stones and 2\" wall clearances. The HIVE Mini 6 is a floor-standing 18.11\" beehive cage with 330 lbs of stones. The CLIFF 6 is a floor-standing natural stone surface tower with 165 lbs of stones and 2\" wall clearances. All four run on the same 30A \/ 10 AWG circuit. The choice between them is mounting style, stone mass, and exterior aesthetic. The CLIFF 6 is the correct choice when a floor-standing heater with natural stone aesthetics, minimal clearances, and CLIFF's specific stone tower form is the priority in this room range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 6kW floor-standing sauna heater package for rooms from 177 to 318 cubic feet. Includes CLIFF 6kW heater, UKU control (Local Black or WiFi - select at checkout), and 165 lbs of rounded olivine diabase stones (5 boxes). Natural stone surface exterior - Red Dot Award-winning design. Slender tower - minimal safety clearances. Internal air duct - 25% faster heat-up. Removable ribs for precise stone loading. 165 lbs stone capacity - 1\"-2\" rounded olivine (CLIFF-specific size). No UKU Extension Box required. Single 30A breaker, 10 AWG wire. 240V \/ 1-phase. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 165 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 318 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNatural stone surface exterior - Red Dot Award design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlender floor-standing tower\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMinimal safety clearances\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e165 lb stone capacity - 5 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e1\"-2\" rounded olivine - correct CLIFF stone size\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemovable ribs for precise stone loading\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 30A breaker - 10 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 30A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 5 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e1\" to 2\" (3-5 cm) rounded - CLIFF-specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior surface\u003c\/td\u003e\n\u003ctd\u003eNatural stone - Nordic cliff face aesthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlender vertical tower - floor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearances\u003c\/td\u003e\n\u003ctd\u003eMinimal - confirm in IOM for 6kW installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone loading\u003c\/td\u003e\n\u003ctd\u003eRemovable ribs for easier precise loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eCLIFF series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 11kW\u003c\/td\u003e\n\u003ctd\u003e354-566 cu ft | 50A \/ 6 AWG | Ext box included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll CLIFF models\u003c\/td\u003e\n\u003ctd\u003eNatural stone surface, 165 lbs stones, 1\"-2\" rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e534-BDL-CLIFF60STULB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CLIFF 6kW floor-standing sauna heater - natural stone surface exterior\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e2 Prop Blocks (For Removal of Sauna Rib Slats)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e165 lbs of 1\" to 2\" (3-5 cm) Round Sauna Stones\u003cbr\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM CLIFF safety railing (recommended), reflector panels (reduce wall clearances further), CLIFF embedding flange (for bench installation). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CLIFF 6STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eNatural stone surface at 6kW - on a 30A circuit\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 6 delivers the full natural stone exterior aesthetic of the CLIFF series on a standard 30A \/ 10 AWG residential circuit - the same electrical requirement as the DROP 6, STEEL 6, and HIVE Mini 6. For buyers who want the CLIFF's Red Dot Award-winning stone-face design in a smaller sauna room without requiring a heavier electrical installation, the CLIFF 6 is the entry point to the CLIFF floor-standing series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSlender tower - minimal footprint and clearances\u003c\/div\u003e\n\u003cp\u003eThe CLIFF's slim rectangular tower profile takes up less floor space than round floor-standing heaters and installs with minimal wall clearances that allow placement in tight sauna room corners or end positions where wider heaters cannot fit without violating safety distances. The same CLIFF body dimensions and clearance advantages are present at 6kW as at 9 and 11kW.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e165 lbs of stone - 1\"-2\" CLIFF specification\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 6 carries 165 lbs of 1\"-2\" (3-5 cm) rounded olivine diabase stones - the CLIFF-specific smaller stone size that fits the narrow tower basket. This stone size is critical: using 2\"-4\" stones from other HUUM packages in the CLIFF basket restricts airflow and risks element damage. The 5 boxes of correct-specification stones are included. No separate stone sourcing is needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRemovable ribs - easier stone loading\u003c\/div\u003e\n\u003cp\u003eLoading 165 lbs of stones into a narrow slender tower basket is made practical by the CLIFF's removable internal basket ribs. The ribs can be removed to fully access the basket interior for precise stone placement, ensuring the correct loading pattern per the Stone Requirements document below, then reinstalled. Correct stone placement in the CLIFF is important for element life and steam quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eInternal air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe integrated internal air duct reduces heat-up time by approximately 25% by directing airflow efficiently through the 165-lb stone mass from the first moment of the heating cycle. It also reduces thermal stress on the elements by improving airflow distribution during warm-up, extending element service life. For a 177-318 cu ft room at 6kW, the heat-up time saving means a shorter wait from switch-on to bathing temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat\u003c\/div\u003e\n\u003cp\u003eUpgrading to UKU WiFi at checkout adds HUUM app control on iOS and Android - remote preheat from anywhere, session scheduling, and temperature monitoring. No UKU Extension Box is required for the 6kW CLIFF. For a 177-318 cu ft room that heats in 20-35 minutes at 6kW, the WiFi option removes the need to be present at switch-on to enjoy a ready sauna.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM CLIFF 6kW floor-standing sauna heater package with natural stone surface UKU control and 165 lbs olivine stones\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/SteelPKG1.jpg?v=1779381989\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - Red Dot Award winner\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF 6STU. 6kW. 177-318 cu ft. Natural stone surface. 165 lbs of stone. Standard 30A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CLIFF 6STU Package is the entry model in the CLIFF floor-standing series - the same Red Dot Award-winning natural stone exterior, slender tower profile, internal air duct, and removable basket ribs as the larger CLIFF models, for rooms from 177 to 318 cubic feet on a standard single 30A \/ 10 AWG circuit. No UKU Extension Box required. 165 lbs of 1\"-2\" rounded olivine stones included. UKU control (Local Black or WiFi at checkout) included. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - CLIFF 6kW, UKU control, and 165 lbs 1\"-2\" rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW, 177-318 cu ft\u003c\/strong\u003e - single 30A \/ 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural stone surface\u003c\/strong\u003e - Red Dot Award design, Nordic cliff aesthetic\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e165 lbs stones, removable ribs, internal air duct\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eCLIFF series - 6kW, 9kW, 11kW\u003c\/span\u003e\n\u003ch4\u003eCLIFF 6 vs CLIFF 9 vs CLIFF 11 - same natural stone design at three output levels\u003c\/h4\u003e\n\u003cp\u003eAll three CLIFF floor-standing models share the same natural stone surface exterior, the same slender tower form, the same 165-lb stone capacity, the same 1\"-2\" (3-5 cm) rounded olivine stone specification, the same removable basket ribs, and the same integrated air duct. The differences are output, room range, and electrical specification. CLIFF 6kW: 177-318 cu ft, 30A \/ 10 AWG, no extension box. CLIFF 9kW: 318-530 cu ft, 50A \/ 8 AWG, no extension box. CLIFF 11kW: 354-566 cu ft, 50A \/ 6 AWG, UKU Extension Box required (included). The CLIFF 6 is the only CLIFF model on a standard 30A residential circuit. For rooms from 177-318 cu ft, it is the most electrically accessible CLIFF option. For rooms requiring more output, the 9kW or 11kW steps up in the same stone tower body.\u003c\/p\u003e\n\u003cp\u003eLicensed electrician required. No GFI\/GFCI. 1\"-2\" stones only - do not use 2\"-4\" stones from other HUUM packages. CLIFF safety railing recommended. Reflector panels and embedding flange sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CLIFF 6kW natural stone tower installed in sauna showing slender profile and minimal wall clearance versus CLIFF 9 and 11\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-cliff-sauna-heater-profile_20-6kw.png?v=1779610030\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF 6STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect stone type or size (2\"-4\" stones must not be used - 1\"-2\" stones required), operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52277852274970,"sku":"534-BDL-CLIFF60STULB","price":3809.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52277852307738,"sku":"534-BDL-CLIFF60STULB+WD","price":3914.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52277852340506,"sku":"534-BDL-CLIFF60STULB+WH","price":3825.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52277852373274,"sku":"534-BDL-CLIFF60STUWB","price":4071.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52277852406042,"sku":"534-BDL-CLIFF60STUWB+WD","price":4332.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52277852438810,"sku":"534-BDL-CLIFF60STUWB+WH","price":4243.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52277852471578,"sku":"534-BDL-CLIFF60STUWGD","price":4994.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52277852504346,"sku":"534-BDL-CLIFF60STUWG","price":4471.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52277852537114,"sku":"534-BDL-CLIFF60STUWMR","price":4994.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelPKG1.jpg?v=1779381989"},{"product_id":"huum-cliff-9stu-pkg-cliff-series-9kw-sauna-heater-package","title":"HUUM CLIFF 9STU Pkg CLIFF Series 9kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM CLIFF 9STU Pkg - CLIFF Series 9kW Sauna Heater Package - SKU 534-BDL-CLIFF90STULB --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=9aUFBFZBrsNDXYW9\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM CLIFF 9STU Pkg CLIFF Series 9kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- SKU: 534-BDL-CLIFF90STULB | CLIFF Series Package | 317-529 cu ft | Electric --\u003e\u003c!-- Model: CLIFF 9STU PKG | 9kW | Floor-mounted - open recycled-steel cage --\u003e\u003c!-- LB suffix = UKU Local controller + UKU Extension Box included in package --\u003e\u003c!-- PACKAGE INCLUDES: CLIFF 9kW heater + UKU Local controller + UKU Extension Box + 165 lbs stones (5 boxes, 3-5 cm) --\u003e\u003c!-- UKU Extension Box REQUIRED for 9kW - included in this package --\u003e\u003c!-- NOTE: Extension Box required for heaters OVER 9kW per HUUM spec, but BathingBrands includes it for 9kW package --\u003e\u003c!-- Safety distances: 9.45\" (24 cm) sides for 9kW model (larger models) --\u003e\u003c!-- Internal air duct - 25% faster heat-up - extends element life --\u003e\u003c!-- Cage made from recycled STEEL heater manufacturing cutouts --\u003e\u003c!-- Removable rib slats for precise stone stacking - 2 prop blocks included --\u003e\u003c!-- Red Dot Design Award 2021 --\u003e\u003c!-- 165 lbs stones (5 boxes, 3-5 cm rounded olivine) - included in package --\u003e\u003c!-- 240V\/1PH | 30A circuit breaker | 10AWG wire | Max 230°F --\u003e\u003c!-- Dimensions: 10.6\"W (270mm) x 6.3\"D (160mm) x 38.4\"H (975mm) --\u003e\u003c!-- Optional: Rail C safety railing | Reflect C reflector panel | Flange CS bench embedding --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- SGS certified | 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- Documents: CLIFF IOM | CLIFF Elements Required | UKU IOM | UKU Installation Diagram | UKU Installation Video | Extension Installation Manual | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .c9 { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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background: #2563a8; }\n  .c9-check li strong { color: #0f172a !important; font-weight: 700; }\n  .c9-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .c9-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .c9-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .c9-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0 0 0.75rem; }\n  .c9-warranty p:last-child { margin: 0; }\n  .c9-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .c9-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .c9-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .c9-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .c9-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .c9-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .c9-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .c9-feat-grid { grid-template-columns: 1fr 1fr; }\n    .c9-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .c9-brand1, .c9-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .c9-brand2 { display: flex; flex-direction: column-reverse; }\n    .c9-brand1 h4, .c9-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .c9 { padding: 0; }\n    .c9-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .c9-feat { padding: 0.8rem 0.9rem; }\n    .c9-inc-grid { grid-template-columns: 1fr; }\n    .c9-spec-grid { gap: 1.25rem; }\n    .c9-spec-table, .c9-spec-table tbody, .c9-spec-table tr, .c9-spec-table td { display: block; width: 100%; }\n    .c9-spec-table { border: none; }\n    .c9-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .c9-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .c9-spec-table td { border: none; padding: 1px 0; }\n    .c9-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .c9-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .c9-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"c9\"\u003e\n\u003cdiv class=\"c9-desc\"\u003e\n\u003cp\u003eThe HUUM CLIFF 9STU Package is the complete ready-to-operate bundle for the 9kW CLIFF electric sauna heater - covering the heater, controller, UKU Extension Box, and stones in a single order. The package includes the CLIFF 9kW heater, UKU Local controller, UKU Extension Box, and 165 lbs of sauna stones (5 boxes, 3-5 cm rounded olivine). The 9kW is the mid-output configuration of the CLIFF floor heater platform, designed for rooms from 317 to 529 cubic feet - sitting between the CLIFF 6 (176-353 cu ft) and the CLIFF 10.5 (353-600 cu ft). The CLIFF 9kW shares the same open recycled-steel cage design, removable rib slats, and internal air duct as all CLIFF floor models - the same Red Dot Award 2021 form factor that is 10.6\" wide and 6.3\" deep throughout the entire CLIFF lineup. Safety clearances at 9kW are 9.45\" (24 cm) at the sides, matching the 10.5kW clearance. The UKU Extension Box included in this package is required for the 9kW model at this installation. Max 230°F. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eWhat the package includes - all four required components\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 9STU Package (SKU 534-BDL-CLIFF90STULB) combines the four items needed to operate the CLIFF 9kW in a single order. The CLIFF 9kW heater has no built-in controls and requires a UKU controller for all operation. This package includes the UKU Local controller (physical wall panel), the UKU Extension Box, and 165 lbs of sauna stones (5 boxes, 3-5 cm rounded olivine). A buyer purchasing the CLIFF 9 heater alone would need to separately source the UKU controller, the UKU Extension Box, and the stones before the heater could be operated. The package eliminates all three separate purchases. The LB suffix in the SKU (534-BDL-CLIFF90STULB) identifies the specific configuration: Local controller and Extension Box. Buyers who prefer Wi-Fi and app control can separately purchase the UKU Wi-Fi controller as an upgrade to the included UKU Local panel.\u003c\/p\u003e\n\u003ch4\u003eCLIFF 9kW - the mid-range CLIFF for medium-sized home saunas\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF floor heater platform covers three output levels: 6kW (176-353 cu ft), 9kW (317-529 cu ft), and 10.5kW (353-600 cu ft). The 9kW sits in the middle - covering medium-sized home saunas where the CLIFF 6 would be undersized and the 10.5kW would be more output than the room requires. The CLIFF 9 and CLIFF 10.5 share the same 9.45\" (24 cm) side clearances, the same 10.6\"W x 6.3\"D body dimensions, and the same 165-lb stone capacity (5 boxes). The key differences from the CLIFF 10.5 are output (9kW vs 10.5kW) and room range ceiling (529 cu ft vs 600 cu ft). For a medium home sauna in the 317-529 cu ft range, the CLIFF 9STU Package provides the correct output in the complete CLIFF package format.\u003c\/p\u003e\n\u003ch4\u003eRed Dot Award 2021 - recycled cage, open stones, precise loading\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF's open recycled-steel cage is fabricated from the cutouts produced during STEEL heater manufacturing. HUUM's description of the design intent: eliminating metal waste and ensuring full use of all material. The CLIFF won the Red Dot Design Award in 2021 for the combination of visual identity, recycled material story, and functional open-stone design. The 165 lbs of rounded olivine stones are fully visible inside the sauna room through the open cage. The removable rib slats - with 2 prop blocks included - allow stones to be loaded with minimal air gaps for tighter stone arrangement and more consistent heat distribution. Stones are in direct contact with the heating elements for maximum heat transfer efficiency from element surface to stone mass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-hook\"\u003e9kW electric sauna heater package for rooms from 317 to 529 cubic feet. CLIFF 9STU Pkg - complete package: CLIFF 9kW heater, UKU Local controller, UKU Extension Box, and 165 lbs stones (5 boxes, 3-5 cm rounded olivine). All four required components in one order. Open recycled-steel cage - Red Dot Award 2021. Removable rib slats for precise stone loading. Internal air duct - 25% faster heat-up. Safety distances: 9.45\" (24 cm) sides. Optional Reflect C can halve clearances. Dimensions: 10.6\"W x 6.3\"D x 38.4\"H. Max 230°F. 240V\/1PH - 30A - 10AWG. Optional: Rail C safety railing; Reflect C reflector panel; Flange CS bench embedding. Pallet delivery required. SGS certified. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"c9-badges\"\u003e\n\u003cspan class=\"c9-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003e317 to 529 cu ft\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eComplete package - heater, UKU Local, Extension Box, and 165 lbs stones\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eUKU Local controller included\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eUKU Extension Box included\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003e165 lbs stones included (5 boxes, 3-5 cm rounded olivine)\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eCLIFF open recycled-steel cage - Red Dot Award 2021\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eRemovable rib slats for precise stone loading\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eSafety: 9.45\" (24 cm) sides\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003e10.6\"W x 6.3\"D x 38.4\"H\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eMax 230°F\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003e240V\/1PH - 30A - 10AWG\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eOptional Reflect C - halves clearances\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eOptional Rail C safety railing\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"c9-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"c9-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"c9-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003ePackage contents\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater\u003c\/td\u003e\n\u003ctd\u003eHUUM CLIFF 9kW electric sauna heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController (included)\u003c\/td\u003e\n\u003ctd\u003eUKU Local controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Box (included)\u003c\/td\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones (included)\u003c\/td\u003e\n\u003ctd\u003e165 lbs \/ 75 kg (5 boxes, 3-5 cm rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProp blocks (included)\u003c\/td\u003e\n\u003ctd\u003e2 prop blocks for rib slat removal during stone loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e317 to 529 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e165 lbs \/ 75 kg (5 boxes, 3-5 cm rounded olivine) - included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e3-5 cm rounded olivine (1-2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct benefit\u003c\/td\u003e\n\u003ctd\u003e25% faster heat-up - extends element life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003eCLIFF cage and stone features\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCage design\u003c\/td\u003e\n\u003ctd\u003eOpen recycled-steel cage - stones visible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCage material origin\u003c\/td\u003e\n\u003ctd\u003eRecycled cutouts from STEEL heater manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Design Award 2021\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemovable rib slats\u003c\/td\u003e\n\u003ctd\u003eYes - precise and accurate stone stacking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProp blocks included\u003c\/td\u003e\n\u003ctd\u003e2 prop blocks for rib slat removal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElement-stone contact\u003c\/td\u003e\n\u003ctd\u003eDirect - stones in contact with heating elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003eSafety distances\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides (9kW)\u003c\/td\u003e\n\u003ctd\u003e9.45 in (24 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront\u003c\/td\u003e\n\u003ctd\u003e16.5 in (419 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith Reflect C panel\u003c\/td\u003e\n\u003ctd\u003eSide distances can be halved (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6kW side clearance (ref.)\u003c\/td\u003e\n\u003ctd\u003e2.36 in (6 cm) - 6kW model only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e10.6 in (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e6.3 in (160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003eCLIFF 9 vs CLIFF 6 vs CLIFF 10.5 - output comparison\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6\u003c\/td\u003e\n\u003ctd\u003e6kW | 176-353 cu ft | 2.36\" sides | no Ext. Box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 9 (this package)\u003c\/td\u003e\n\u003ctd\u003e9kW | 317-529 cu ft | 9.45\" sides | Ext. Box included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 10.5\u003c\/td\u003e\n\u003ctd\u003e10.5kW | 353-600 cu ft | 9.45\" sides | Ext. Box included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions (all 3)\u003c\/td\u003e\n\u003ctd\u003e10.6\"W x 6.3\"D x 38.4\"H - identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity (all 3)\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes) - identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eIncluded in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-spec-block\"\u003e\n\u003ch4\u003eUKU Local controller (included) and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"c9-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eController type\u003c\/td\u003e\n\u003ctd\u003eUKU Local - physical wall panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote \/ app control\u003c\/td\u003e\n\u003ctd\u003eNot available (UKU Local - no Wi-Fi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi upgrade\u003c\/td\u003e\n\u003ctd\u003eUKU Wi-Fi controller available separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eRail C (CLIFF-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eReflect C (halves side clearances) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eFlange CS (CLIFF-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified | 5-year limited warranty (excl. elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"c9-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"c9-inc-grid\"\u003e\n\u003cdiv class=\"c9-inc-item\"\u003eHUUM CLIFF 9kW floor-mounted electric sauna heater with open recycled-steel cage\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003eUKU Local controller (wall panel)\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003e165 lbs \u003cspan\u003e1\" to 2\" (3-5 cm) \u003c\/span\u003e\u003cspan\u003eRound Sauna Stones\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003e2 prop blocks for rib slat removal during stone loading\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003eCLIFF Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003eUKU Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003eExtension Installation Manual\u003c\/div\u003e\n\u003cdiv class=\"c9-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e Licensed electrician for wiring (240V\/1PH, 30A circuit breaker, 10AWG wire). An additional box of stones is recommended. \u003cstrong\u003eOptional accessories (sold separately - CLIFF-specific):\u003c\/strong\u003e Rail C safety railing; Reflect C reflector panel (halves side clearances); Flange CS bench embedding flange. To upgrade to Wi-Fi control, the UKU Wi-Fi controller is available separately.\u003c\/p\u003e\n\u003chr class=\"c9-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CLIFF 9STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"c9-feat-grid\"\u003e\n\u003cdiv class=\"c9-feat\"\u003e\n\u003cdiv class=\"c9-feat-title\"\u003eComplete package - heater, controller, Extension Box, and stones\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 9STU Package combines all four items needed to operate the CLIFF 9kW into a single order. The CLIFF 9kW requires a UKU controller for all operation (no built-in controls), a UKU Extension Box for the 9kW configuration, and the stones before a first session can be run. Purchasing the heater alone leaves three separate sourcing and ordering steps. The package covers all four - heater, UKU Local controller, UKU Extension Box, and 165 lbs of stones - so the only remaining requirement after delivery is the licensed electrician for the 240V\/1PH, 30A, 10AWG wiring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-feat\"\u003e\n\u003cdiv class=\"c9-feat-title\"\u003e9kW for 317-529 cu ft - the mid-range CLIFF\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 9kW serves the medium home sauna range - 317 to 529 cubic feet - where the CLIFF 6 (up to 353 cu ft) reaches its ceiling and the CLIFF 10.5 (up to 600 cu ft) provides more output than is needed. For a home sauna in the 317-529 cu ft range where the CLIFF's Red Dot open-cage design is the aesthetic and the narrow 10.6\"W x 6.3\"D profile is the installation requirement, the 9kW is the correct output specification. The body dimensions, stone capacity (165 lbs \/ 5 boxes), internal air duct, and side clearances (9.45\") are identical to the CLIFF 10.5 - only the output and room range upper limit differ.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-feat\"\u003e\n\u003cdiv class=\"c9-feat-title\"\u003eExtension Box included - required component, no separate purchase\u003c\/div\u003e\n\u003cp\u003eThe UKU Extension Box is included in this package. For the CLIFF 9kW installation at BathingBrands, the Extension Box is part of the package to ensure a complete, fully operational system. Purchasing the CLIFF 9 heater alone would leave the Extension Box as a separate purchase. The Extension Installation Manual included in this package documents the correct wiring configuration for the Extension Box alongside the heater and UKU Local controller. The UKU Wi-Fi controller can be purchased separately as an upgrade if remote smartphone access is preferred over the included physical wall panel control.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-feat\"\u003e\n\u003cdiv class=\"c9-feat-title\"\u003eRed Dot Award 2021 - open cage, recycled steel, precise stone loading\u003c\/div\u003e\n\u003cp\u003eThe CLIFF won the Red Dot Design Award in 2021 for its combination of visual identity, recycled material story, and functional open-stone design. The cage ribs are made from the stainless steel cutouts produced during STEEL heater manufacturing - material that would otherwise be production waste. HUUM's description: the body of the heater is made from cutouts of a stainless steel sheet created during the production of STEEL electric heaters, which eliminates metal waste and ensures full use of all material. The open cage puts the 165-lb stone column on visual display. Removable rib slats allow precise stone arrangement to minimise air gaps in the stone bed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-feat\"\u003e\n\u003cdiv class=\"c9-feat-title\"\u003e165 lbs of stones with direct element contact and 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 9kW holds 165 lbs of rounded olivine stones (5 boxes, 3-5 cm) in direct contact with the heating elements - maximising heat transfer efficiency from element surface to stone mass. The internal air duct channels air through the stone column to increase heating speed by up to 25% and reduce thermal stress on the elements, extending their service life. HUUM's description of the design: the stones are engineered to be in direct contact with the heating elements for more efficient heat transference. The air tunnel also extends element life as a byproduct of the more efficient thermal management.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-feat\"\u003e\n\u003cdiv class=\"c9-feat-title\"\u003eCLIFF Series - 6kW, 9kW, and 10.5kW floor models\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 9STU Package covers the 9kW mid-range configuration of the CLIFF floor heater series. The CLIFF Series spans: CLIFF 6 (6kW, 176-353 cu ft, 2.36\" side clearances, heater only - no package), CLIFF 9 in this package (9kW, 317-529 cu ft, 9.45\" sides, complete package), and CLIFF 10.5 in the CLIFF 11STU Package (10.5kW, 353-600 cu ft, 9.45\" sides, complete package). All three floor models share the same 10.6\"W x 6.3\"D body, open recycled-steel cage, removable rib slats, 165-lb stone capacity (5 boxes), internal air duct, Red Dot Award 2021 design, CLIFF-specific optional accessories (Rail C, Reflect C, Flange CS), SGS certification, and 5-year warranty. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"c9-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"c9-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CLIFF 9STU Package 534-BDL-CLIFF90STULB 9kW electric sauna heater 317-529 cu ft 165 lbs stones UKU Local Extension Box\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/SteelPKG1.jpg?v=1779381989\u0026amp;width=800\" class=\"c9-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"c9-brand-tag\"\u003eDesigned in Estonia - SGS Certified - CLIFF Series - Red Dot Award 2021 - Complete Package\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF 9STU Pkg. 9kW. 317-529 cu ft. Heater, UKU Local, Extension Box, and 165 lbs stones.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CLIFF 9STU Package is the complete ready-to-operate bundle for the CLIFF 9kW electric sauna heater - Red Dot Award 2021 open recycled-steel cage, removable rib slats, internal air duct (25% faster heat-up), UKU Local controller, UKU Extension Box, and 165 lbs stones (5 boxes, 3-5 cm) all included. A licensed electrician for wiring is the only remaining requirement. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"c9-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW electric\u003c\/strong\u003e - 317-529 cu ft - CLIFF open recycled-steel cage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local + UKU Extension Box included\u003c\/strong\u003e - all required components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e165 lbs stones included (5 boxes, 3-5 cm)\u003c\/strong\u003e - direct element-stone contact\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRed Dot Award 2021\u003c\/strong\u003e - removable rib slats - internal air duct 25% faster\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e9.45\" side clearances - SGS certified - 5-year warranty (excl. elements)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"c9-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"c9-brand-tag\"\u003eCLIFF 9STU Pkg vs CLIFF 11STU Pkg vs CLIFF 6 - CLIFF Series selection guide\u003c\/span\u003e\n\u003ch4\u003eCLIFF 9STU Pkg vs CLIFF 11STU Pkg vs CLIFF 6 - output, room range, and purchase format\u003c\/h4\u003e\n\u003cp\u003eThree CLIFF configurations serve different room sizes and purchase preferences. CLIFF 6 H1004012 (heater only): 6kW, 176-353 cu ft, 10.6\"W x 6.3\"D, 165 lbs stones sold separately, 2.36\" side clearances, no Extension Box needed, 30A\/10AWG. Right for smaller rooms where the tightest possible CLIFF clearances and heater-only purchase are preferred. CLIFF 9STU Pkg 534-BDL-CLIFF90STULB (this listing): 9kW, 317-529 cu ft, same 10.6\"W x 6.3\"D CLIFF body, 165 lbs stones included, 9.45\" side clearances, UKU Local + Extension Box included, 30A\/10AWG. Right for medium rooms (317-529 cu ft) as a complete all-in-one package. CLIFF 11STU Pkg 534-BDL-CLIFF105STULBX: 10.5kW, 353-600 cu ft, same 10.6\"W x 6.3\"D CLIFF body, 165 lbs stones included, 9.45\" side clearances, UKU Local + Extension Box included. Right for the largest rooms (up to 600 cu ft) in the CLIFF lineup. All three CLIFF floor models share the identical body dimensions, open recycled-steel cage, removable rib slats, 165-lb stone capacity, internal air duct, Red Dot Award 2021 design, SGS certification, and 5-year warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CLIFF 9STU Package 9kW mid-range vs CLIFF 11STU Package 10.5kW larger vs CLIFF 6 heater-only 6kW comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/HUUM-cliff-sauna-heater-profile_20-6kw.png?v=1779613038\u0026amp;width=800\" class=\"c9-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"c9-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"c9-manual\"\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eCLIFF Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eCLIFF Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"c9-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"c9-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"c9-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF 9kW carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines (including the Extension Installation Manual for the UKU Extension Box), use of incorrect stone type or size (decorative stones must not be used; use only rounded olivine 3-5 cm in the CLIFF), operating without the required stone load, or damage from inadequate electrical installation. HUUM recommends rounded olivine stones to complement the open-cage design and achieve milder steam. The UKU Local controller and UKU Extension Box included in the package carry their own separate HUUM product warranty terms. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52278511010074,"sku":"534-BDL-CLIFF90STULB","price":4100.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52278511042842,"sku":"534-BDL-CLIFF90STULB+WD","price":4413.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52278511108378,"sku":"534-BDL-CLIFF90STUWB","price":4362.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52278511141146,"sku":"534-BDL-CLIFF90STUWB+WD","price":4675.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52278511206682,"sku":"534-BDL-CLIFF90STUWGD","price":4537.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52278511239450,"sku":"534-BDL-CLIFF90STUWG","price":4762.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52278511272218,"sku":"534-BDL-CLIFF90STUWMR","price":5025.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelPKG1.jpg?v=1779381989"},{"product_id":"huum-cliff-mini-4stu-pkg-cliff-mini-series-4kw-sauna-heater-package","title":"HUUM CLIFF Mini 4STU Pkg CLIFF Mini Series 4kW Sauna Heater Package","description":"\u003c!-- HUUM CLIFF Mini 4STU Package - 4kW Wall-Mounted Sauna Heater, Natural Stone Surface --\u003e\n\u003ch2\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=WwrBVp9K0_J-P1Tl\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM CLIFF Mini 4STU Pkg CLIFF Mini Series 4kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- 10 document sections: CLIFF IOM | CLIFF Elements Required | CLIFF Warranty | UKU IOM | UKU Diagram | UKU Video | UKU Warranty | Extension Installation Manual | Extension Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM CLIFF Mini 4STU Package is a complete sauna heater package for small sauna rooms from 106 to 177 cubic feet, including the CLIFF Mini 4kW heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 132 lbs of rounded olivine diabase sauna stones (4 boxes). The CLIFF Mini is the wall-mounted member of the CLIFF family - a fundamentally different installation from the floor-standing CLIFF 6, 9, and 11. Where the full-size CLIFF models stand on the sauna floor with a slender tower footprint, the CLIFF Mini mounts on the sauna wall with a bracket, taking zero floor space. At 4kW for rooms from 106 to 177 cubic feet, the CLIFF Mini is the most compact CLIFF model and the lightest electrical requirement in the CLIFF family: a 15A circuit breaker and 14 AWG wire - the lightest spec of any HUUM heater.\u003c\/p\u003e\n\u003ch4\u003eWall-mounted - the CLIFF aesthetic without the floor footprint\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF Mini brings the natural stone surface exterior and the minimal safety clearances of the CLIFF family to a wall-mounted format suited for the smallest sauna rooms. Like the full CLIFF series, the CLIFF Mini is covered in natural stone panels on its exterior surfaces, giving it the visual character of a Nordic cliff face rather than a conventional electric heater. The CLIFF Mini dimensions are 10.6\"W x 6.3\"D x 38.4\"H - a tall, slim profile that mounts flush to the sauna wall on a bracket. The safety clearance from the side walls is 2\" (6 cm), making it one of the most space-efficient wall-mounted sauna heaters available. For small sauna rooms from 106 to 177 cubic feet where floor space is at a premium and the CLIFF's natural stone aesthetic is desired, the CLIFF Mini delivers both.\u003c\/p\u003e\n\u003ch4\u003e132 lbs of stone and removable ribs - more stone than comparably sized wall-mounted heaters\u003c\/h4\u003e\n\u003cp\u003eDespite its compact wall-mounted format for the smallest room range in the HUUM lineup, the CLIFF Mini carries 132 lbs (4 boxes) of rounded olivine diabase stones - substantially more than most comparably sized wall-mounted electric sauna heaters at 4kW. The higher stone capacity for its size is the result of HUUM's optimized internal basket geometry, which maximizes stone volume within the slim CLIFF form factor. The removable internal basket ribs make loading 132 lbs of 1\"-2\" (3-5 cm) rounded olivine into the narrow basket practical and precise. As with all CLIFF models, the 1\"-2\" stone size is CLIFF-specific - do not use the 2\"-4\" stones from DROP, HIVE, or STEEL packages in the CLIFF Mini basket. The integrated internal air duct speeds up heating by approximately 25% and extends element life.\u003c\/p\u003e\n\u003ch4\u003e15A \/ 14 AWG - the lightest electrical requirement of any HUUM heater\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF Mini 4kW requires a 15A two-pole breaker and 14 AWG wire - lighter than every other HUUM heater including the STEEL Mini 3.5kW (20A \/ 12 AWG) and the DROP 4.5kW (30A \/ 10 AWG). For small sauna rooms in homes, apartments, or cabin saunas where the electrical panel has limited capacity, the CLIFF Mini is the most electrically accessible HUUM heater available. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker. No UKU Extension Box is required for the 4kW output level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 4kW wall-mounted sauna heater package for small rooms from 106 to 177 cubic feet. Includes CLIFF Mini 4kW heater, UKU control (Local Black or WiFi - select at checkout), and 132 lbs of rounded olivine diabase stones (4 boxes). Natural stone surface exterior - Red Dot Award-winning CLIFF design. Wall-mounted - no floor space used. 2\" safety clearance from walls. 132 lbs stone capacity - more than comparably sized wall-mounted heaters. Internal air duct - 25% faster heat-up. Removable ribs for precise stone loading. 1\"-2\" rounded olivine (CLIFF-specific size). No UKU Extension Box required. Single 15A breaker, 14 AWG wire - lightest electrical requirement in the HUUM range. 240V \/ 1-phase. 10.6\"W x 6.3\"D x 38.4\"H. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 132 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e4 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e106 to 177 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWall-mounted - no floor space\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNatural stone surface exterior - Red Dot Award design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\" safety clearance from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e132 lb stone capacity - 4 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e1\"-2\" rounded olivine - correct CLIFF stone size\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemovable ribs for precise stone loading\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 15A breaker - 14 AWG - lightest HUUM circuit\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e4 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e15 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 15A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e14 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 4kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e106 to 177 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e132 lbs (4 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 4 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e1\" to 2\" (3-5 cm) rounded - CLIFF-specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical and clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (W x D x H)\u003c\/td\u003e\n\u003ctd\u003e10.6\" x 6.3\" x 38.4\" (270 x 160 x 975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e2\" (6 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eWall-mounted with bracket\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone loading\u003c\/td\u003e\n\u003ctd\u003eRemovable ribs for easier precise loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior surface\u003c\/td\u003e\n\u003ctd\u003eNatural stone - Nordic cliff face aesthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 4kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eFull CLIFF family comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF Mini 4kW (this)\u003c\/td\u003e\n\u003ctd\u003eWall-mounted | 106-177 cu ft | 15A \/ 14 AWG | 132 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6kW\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | 177-318 cu ft | 30A \/ 10 AWG | 165 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 9kW\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | 318-530 cu ft | 50A \/ 8 AWG | 165 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 11kW\u003c\/td\u003e\n\u003ctd\u003eFloor-standing | 354-566 cu ft | 50A \/ 6 AWG | 165 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003e534-BDL-CLIFFM35STULB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CLIFF Mini 4kW wall-mounted sauna heater - natural stone surface exterior\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e132 lbs. of 1\" to 2\" (3-5 cm) Round Sauna Stones\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003e2 prop blocks (for removal of basket rib slats during stone loading)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM CLIFF Mini safety railing (strongly recommended), reflector panels (reduce wall clearances further). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CLIFF Mini 4STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eNatural stone surface - wall-mounted for small rooms\u003c\/div\u003e\n\u003cp\u003eThe CLIFF Mini brings the natural stone exterior aesthetic of the CLIFF family to a wall-mounted format for rooms from 106 to 177 cubic feet. For a small personal home sauna, apartment sauna, or cabin sauna where floor space is at a premium, the CLIFF Mini delivers the Red Dot Award-winning Nordic cliff face design on a bracket mount at 2\" from the wall - with zero floor footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e15A \/ 14 AWG - lightest circuit in the HUUM lineup\u003c\/div\u003e\n\u003cp\u003eThe CLIFF Mini 4kW requires a 15A breaker and 14 AWG wire - lighter than any other HUUM heater, including the STEEL Mini 3.5kW (20A) and the DROP 4.5kW (30A). For saunas in homes with limited panel capacity, older electrical panels, or installations where running heavier wire is impractical, the CLIFF Mini is the most electrically accessible HUUM option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e132 lbs of stone - generous for 4kW wall-mounted\u003c\/div\u003e\n\u003cp\u003eAt 132 lbs, the CLIFF Mini carries more stone mass than most comparable wall-mounted 4kW electric sauna heaters. HUUM's optimized internal basket geometry packs more stone volume into the slim CLIFF Mini body than conventional heaters of equivalent output and size. More stone mass at 4kW produces softer, longer-lasting steam and more sustained temperature in the small room the CLIFF Mini serves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e2\" from the wall - exceptional placement flexibility\u003c\/div\u003e\n\u003cp\u003eThe CLIFF Mini requires only 2\" (6 cm) clearance from the side walls - among the smallest safety clearances of any wall-mounted sauna heater. In rooms from 106-177 cu ft where bench positions and structural constraints leave minimal wall space, the CLIFF Mini can be placed where most other heaters cannot. Reflector panels (sold separately) reduce clearances further for the tightest installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRemovable ribs and 1\"-2\" stone specification\u003c\/div\u003e\n\u003cp\u003eThe removable internal basket ribs make loading 132 lbs of 1\"-2\" rounded olivine stones into the narrow CLIFF Mini basket practical. The prop blocks included in the package assist with rib removal and replacement. The 1\"-2\" stone size is CLIFF-specific and different from the 2\"-4\" stones used in DROP, HIVE, and STEEL heaters - never substitute stones from other packages in the CLIFF Mini.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi option - remote preheat for a compact sauna\u003c\/div\u003e\n\u003cp\u003eA 106-177 cu ft sauna room at 4kW reaches bathing temperature in approximately 15-25 minutes. Upgrading to UKU WiFi adds HUUM app remote preheat and scheduling on iOS and Android - start the sauna from anywhere and arrive to a ready room. No extension box required. For regular sauna users, the WiFi option eliminates the need to plan the warm-up in advance for every session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CLIFF Mini 4kW wall-mounted sauna heater package with natural stone surface UKU control and 132 lbs olivine stones\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/CliffMiniPKG1_20_283_29.jpg?v=1779620124\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - Red Dot Award winner\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF Mini 4STU. 4kW. 106-177 cu ft. Natural stone surface. Wall-mounted. 15A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CLIFF Mini is the wall-mounted member of the CLIFF family - natural stone exterior, slim profile, and 2\" wall clearances in a bracket-mount format for rooms from 106 to 177 cubic feet on a 15A \/ 14 AWG circuit. The CLIFF Mini 4STU Package includes the heater, UKU control (Local Black or WiFi at checkout), and 4 boxes of 1\"-2\" rounded olivine stones (132 lbs). The lightest electrical requirement in the HUUM range. No UKU Extension Box required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - CLIFF Mini 4kW, UKU control, and 132 lbs 1\"-2\" rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4kW, 106-177 cu ft\u003c\/strong\u003e - single 15A \/ 14 AWG, 240V\/1PH - lightest HUUM circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural stone surface\u003c\/strong\u003e - Red Dot Award CLIFF design - wall-mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" from walls, zero floor footprint\u003c\/strong\u003e - 132 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eCLIFF Mini vs CLIFF 6 - wall-mounted vs floor-standing\u003c\/span\u003e\n\u003ch4\u003eWhen to choose the CLIFF Mini vs the floor-standing CLIFF 6\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF Mini 4kW is wall-mounted for rooms from 106-177 cu ft on a 15A \/ 14 AWG circuit with 132 lbs of stones. The CLIFF 6kW is floor-standing for rooms from 177-318 cu ft on a 30A \/ 10 AWG circuit with 165 lbs of stones. For rooms below 177 cu ft, only the CLIFF Mini is appropriately sized in the CLIFF family. For rooms at exactly 177 cu ft, either could serve the room - the CLIFF Mini is wall-mounted with lighter electrical; the CLIFF 6 is floor-standing with more stone mass and more output. For rooms above 177 cu ft, the CLIFF 6, 9, or 11 are the floor-standing choices. The CLIFF Mini is the right choice specifically when the room is 177 cu ft or smaller, the 15A circuit is preferred or required, wall-mounted installation is wanted, and the CLIFF natural stone aesthetic is the design goal. The HUUM safety railing is strongly recommended for all CLIFF Mini installations - the heater surface reaches high temperatures and stones are at accessible height without a railing barrier.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM CLIFF Mini 4kW wall-mounted in small sauna showing natural stone exterior at 2 inch wall clearance versus floor-standing CLIFF 6\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum_uku1_1_28d85d78-f4c9-4671-a5cc-3ba0ce923a07.jpg?v=1779377905\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Elements Required\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCLIFF Warranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2021-12\/HUUM%20Heater%20Warranty%202021.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e CLIFF Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Warranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/UKU%20Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Warranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/UKU%20Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF Mini 4STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect stone type or size (2\"-4\" stones must not be used - 1\"-2\" stones required), operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. The HUUM safety railing is strongly recommended for all CLIFF Mini installations. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52278526968090,"sku":"534-BDL-CLIFFM35STULB","price":3385.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52278527000858,"sku":"534-BDL-CLIFFM35STULB+WD","price":3490.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52278527066394,"sku":"534-BDL-CLIFFM35STUWB","price":3647.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52278527099162,"sku":"534-BDL-CLIFFM35STUWB+WD","price":3908.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52278527164698,"sku":"534-BDL-CLIFFM35STUWGD","price":3819.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52278527197466,"sku":"534-BDL-CLIFFM35STUWG","price":4047.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52278527230234,"sku":"534-BDL-CLIFFM35STUWMR","price":4570.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/CliffMiniPKG1_20_283_29.jpg?v=1779620124"},{"product_id":"huum-uku-gold-sauna-heater-control-with-additional-accessories","title":"HUUM UKU Gold Sauna Heater Control with Additional accessories","description":"\u003cp\u003e\u003c!-- HUUM UKU Gold - WiFi Sauna Control with Gold Glass Panel --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=BDcOchKbwOb5lY4T\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/h2\u003e\n\u003ch2\u003eHUUM UKU Gold Sauna Heater Control with WiFi, Digital On\/Off, Time,Temp, Gold\u003c\/h2\u003e\n\u003c!-- SKU: 536-BDL-UKU-WIFI-GOLD | Built-in WiFi | Up to 11kW direct, 18kW with Extension Box --\u003e\u003c!-- Works with different manufacturers heaters | Recessed or surface-mounted | Made in Estonia --\u003e\u003c!-- Gold glass panel - same functions as UKU Mirror and UKU Local variants --\u003e\u003c!-- 4 document sections: Installation \u0026 Operation Manual (ampersand) | Install Diagram | Installation Video | Warranty --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand1 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM UKU Gold is a WiFi sauna control with a gold glass panel - a premium finish option within the UKU Glass control family. It shares identical functionality with the UKU Mirror and UKU Local controls: the same HUUM app connectivity, the same temperature range, the same safety features, and the same heater compatibility. What distinguishes the UKU Gold is its panel surface - gold-toned glass that brings a warm metallic accent to the sauna control position, suited to sauna interiors with warm wood tones, brass or gold hardware, amber lighting, and Nordic or spa-influenced design palettes where the cooler reflective surface of the UKU Mirror would not integrate as naturally. All UKU WiFi functions are available from both the panel and the HUUM app on iOS and Android.\u003c\/p\u003e\n\u003ch4\u003eGold glass panel - a warm metallic finish for the sauna wall\u003c\/h4\u003e\n\u003cp\u003eThe UKU Gold panel is made of glass with a gold-toned surface finish. In sauna rooms with warm interior materials - amber-toned cedar, golden-brown pine, thermo-ash, or natural birch - the gold panel reads as a designed accent rather than a utility control. Sauna rooms with brass or gold fixture hardware, warm LED lighting, and earthy stone or tile accents are the natural home for the UKU Gold: it complements the warmth of these material palettes in a way that the cooler, more neutral UKU Mirror or the stark contrast of the UKU Local Black cannot. The panel can be installed recessed flush into the wall or surface-mounted with the optional UKU Frame bezel (sold separately). Both options are covered in the Install Diagram in the documents section below.\u003c\/p\u003e\n\u003ch4\u003eFull UKU WiFi feature set - remote preheat, scheduling, safety\u003c\/h4\u003e\n\u003cp\u003eThe UKU Gold includes the complete HUUM UKU WiFi control feature set. From the HUUM app on iOS or Android, the sauna can be turned on or off from anywhere, the target temperature can be set from 122°F to 230°F (50-110°C), a delayed start can be programmed up to 48 hours in advance, and the current temperature can be monitored live. A push notification is sent when the sauna reaches the set temperature. Unlimited users can be connected to the same sauna through the HUUM app. Safety features include overheating protection (automatic shutoff at approximately 266°F \/ 130°C), a door sensor that prevents remote starting when the sauna door is open, and a child safety lock. The panel supports 8 languages: English, Estonian, German, Russian, Italian, Finnish, Polish, and French.\u003c\/p\u003e\n\u003ch4\u003eCompatible with different heater brands - up to 18kW with Extension Box\u003c\/h4\u003e\n\u003cp\u003eLike all UKU WiFi controls, the UKU Gold is compatible with electric sauna heaters from different manufacturers within the supported load range. Without the UKU Extension Box, it controls heaters up to 11kW directly. For heaters from 11kW to 18kW - including all HUUM heaters over 11kW - the UKU Extension Box (sold separately) is required. Lighting, ventilation, and steamer accessory connections allow the UKU Gold to manage the complete sauna room environment from the same panel and app interface. The sauna heater is sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eWiFi sauna control with gold glass panel. Compatible with sauna heaters from different manufacturers up to 11kW direct, up to 18kW with UKU Extension Box (sold separately). HUUM app - iOS and Android - remote on\/off, temperature 122-230°F, delayed start up to 48 hours, live temperature monitoring, notification when ready. Unlimited users. 8 languages. Safety: overheat protection (266°F shutoff), door sensor, child safety lock. Controls lighting, ventilation, and steamer accessories. Recessed or surface-mounted. 5-year warranty. Made in Estonia by HUUM. Sauna heater sold separately.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eGold glass panel\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eBuilt-in WiFi - HUUM app iOS and Android\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUp to 11kW direct \/ 18kW with Extension Box\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompatible with different heater brands\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemote on\/off and temperature control\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122-230°F temperature range\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDelayed start up to 48 hours\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNotification when sauna is ready\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUnlimited users\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e8 languages\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eLighting, ventilation, steamer connections\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRecessed or surface-mounted\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOverheat protection, door sensor, child lock\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty - made in Estonia\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHeater compatibility\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDirect (no extension box)\u003c\/td\u003e\n\u003ctd\u003eUp to 11 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith UKU Extension Box\u003c\/td\u003e\n\u003ctd\u003e11 kW to 18 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible heater brands\u003c\/td\u003e\n\u003ctd\u003eDifferent manufacturers - not HUUM-only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSauna heater included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHUUM app functions\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (free)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote on\/off\u003c\/td\u003e\n\u003ctd\u003eYes - from anywhere\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e122-230°F (50-110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelayed start\u003c\/td\u003e\n\u003ctd\u003eUp to 48 hours in advance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature monitoring\u003c\/td\u003e\n\u003ctd\u003eLive current temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReady notification\u003c\/td\u003e\n\u003ctd\u003eYes - push notification when set temperature reached\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsers\u003c\/td\u003e\n\u003ctd\u003eUnlimited per sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePanel and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePanel surface\u003c\/td\u003e\n\u003ctd\u003eGold-toned glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation options\u003c\/td\u003e\n\u003ctd\u003eRecessed (flush) or surface-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional bezel\u003c\/td\u003e\n\u003ctd\u003eUKU Frame - sold separately for surface mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLanguages\u003c\/td\u003e\n\u003ctd\u003eEnglish, Estonian, German, Russian, Italian, Finnish, Polish, French (8 total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccessory connections\u003c\/td\u003e\n\u003ctd\u003eLighting, ventilation, steamer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSafety features\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOverheat protection\u003c\/td\u003e\n\u003ctd\u003eAuto-shutoff at approximately 266°F (130°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor sensor\u003c\/td\u003e\n\u003ctd\u003ePrevents remote start when sauna door is open\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChild safety lock\u003c\/td\u003e\n\u003ctd\u003eYes - prevents accidental activation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eUKU Glass family comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Gold (this listing)\u003c\/td\u003e\n\u003ctd\u003eGold-toned glass - warm metallic accent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Mirror\u003c\/td\u003e\n\u003ctd\u003eMirrored glass - reflective contemporary\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eMatte black panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local w\/Wood Case\u003c\/td\u003e\n\u003ctd\u003eThermo-ash wood enclosure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll variants\u003c\/td\u003e\n\u003ctd\u003eIdentical WiFi functions, compatibility, warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU Gold WiFi control panel with gold-toned glass surface\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eMain control module\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eTemperature sensor\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eDoor sensor\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eSold separately (not included):\u003c\/strong\u003e Sauna heater; UKU Extension Box (required for heaters over 11kW up to 18kW); UKU Frame bezel (for surface-mounted installation). \u003cstrong\u003eFree:\u003c\/strong\u003e HUUM app - download from App Store or Google Play.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM UKU Gold stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eGold glass panel - warm metallic finish\u003c\/div\u003e\n\u003cp\u003eThe UKU Gold's gold-toned glass panel is the warmest finish in the UKU Glass family - complementing sauna interiors with amber wood tones, brass or gold hardware, warm lighting, and earthy material palettes. Where the UKU Mirror's reflective surface suits cool, contemporary interiors, the UKU Gold suits warm, traditionally influenced or Nordic spa-style sauna rooms where a gold accent reads as intentional design rather than contrast.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRemote preheat - sauna ready when you arrive\u003c\/div\u003e\n\u003cp\u003eTurn the sauna on from the HUUM app before leaving work, set a delayed start for a specific time, or monitor the current temperature from anywhere. A push notification arrives when the sauna reaches the set temperature. Unlimited users means every member of the household can control and monitor the sauna from their own phone without sharing credentials or being present at the control panel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCompatible with different heater brands\u003c\/div\u003e\n\u003cp\u003eThe UKU Gold is not restricted to HUUM heaters. It works with electric sauna heaters from multiple manufacturers within the supported load range - up to 11kW directly, or up to 18kW with the UKU Extension Box (sold separately). For sauna rooms with non-HUUM heaters where app control is the goal, the UKU Gold can often be added as a control upgrade without replacing the heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eLighting, ventilation, and steamer control\u003c\/div\u003e\n\u003cp\u003eAccessory connections allow sauna lighting, ventilation, and an optional steamer to be controlled from the same UKU Gold panel and HUUM app interface as the heater. One control panel manages the complete sauna room environment - not just the heater - from both the wall panel and the phone, remotely from anywhere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSafety: overheat, door sensor, child lock\u003c\/div\u003e\n\u003cp\u003eOverheating protection automatically shuts down the heater if the sauna temperature exceeds approximately 266°F (130°C). The door sensor prevents the HUUM app from remotely starting the heater when the sauna room door is open. The child safety lock prevents accidental activation from the panel. All three safety features are standard across all UKU WiFi panel variants.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eRecessed or surface-mounted\u003c\/div\u003e\n\u003cp\u003eThe UKU Gold installs flush-recessed into the wall for a seamless, integrated appearance, or surface-mounted with the optional UKU Frame bezel (sold separately) for a more prominent panel presentation. Both installation methods are covered in the Install Diagram document below. The gold panel surface is visible and legible at normal sauna temperatures and humidity levels from the recessed or surface position.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-uku-gold-panel_0.jpg?v=1779621261\u0026amp;width=800\" alt=\"HUUM UKU Gold WiFi sauna control panel with gold-toned glass surface and HUUM mobile app display\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - 5-year warranty\u003c\/span\u003e\n\u003ch4\u003eHUUM UKU Gold. Gold glass panel. Full WiFi app control. Compatible with different heater brands.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The UKU Gold is the warm-toned premium panel variant in the UKU WiFi control family - the same HUUM app connectivity, temperature range, safety features, and heater compatibility as the UKU Mirror, UKU Local Black, and UKU Local w\/Wood Case, with a gold-toned glass panel for sauna rooms where a warm metallic accent is the design goal. Controls heaters up to 11kW directly and up to 18kW with the UKU Extension Box (sold separately). Compatible with different manufacturers' heaters. Sauna heater sold separately. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eGold-toned glass panel\u003c\/strong\u003e - recessed or surface-mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHUUM app WiFi\u003c\/strong\u003e - iOS and Android - remote preheat, scheduling, monitoring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUp to 11kW direct\u003c\/strong\u003e \/ up to 18kW with UKU Extension Box\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible with different heater brands\u003c\/strong\u003e - not HUUM-only\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e5-year warranty, made in Estonia\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstall Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/UKU%20Glass.Mirro%20Install%20Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Install Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM UKU Gold is covered by HUUM's \u003cstrong\u003e5-year warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. The warranty does not cover damage caused by improper installation, use outside of the specified heater load range, or failure to use the UKU Extension Box when required for heaters over 11kW. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Gold","offer_id":52278545482010,"sku":"536-BDL-UKU-WIFI-GOLD","price":1499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/UKU-gold-Wi-Fi-App-500x500.jpg?v=1779621236"},{"product_id":"huum-steel-11stu-pkg-steel-series-10-5kw-sauna-heater-package","title":"HUUM STEEL 11STU Pkg STEEL Series 10.5kW Sauna Heater Package","description":"\u003c!-- HUUM STEEL 11STU Pkg - STEEL Series 10.5kW Sauna Heater Package - SKU 534-BDL-STEEL105STULBX --\u003e\u003c!-- SKU: 534-BDL-STEEL105STULBX | STEEL Series Package | 353-600 cu ft | Electric --\u003e\u003c!-- Model: STEEL 11STU PKG | 10.5kW | Floor-mounted enclosed square stainless steel pillar --\u003e\u003c!-- LBX suffix = UKU Local controller + UKU Extension Box included in package --\u003e\u003c!-- PACKAGE INCLUDES: STEEL 10.5kW heater + UKU Local controller + UKU Extension Box + 330 lbs stones (10 boxes, 3-5 cm) --\u003e\u003c!-- UKU Extension Box REQUIRED for 10.5kW - included in this package --\u003e\u003c!-- STEEL is a DIFFERENT form from CLIFF: enclosed square stainless steel pillar (not open cage) --\u003e\u003c!-- Safety distances: 4\" (10 cm) sides for 10.5kW STEEL (vs 2\"\/5cm for STEEL 6kW) --\u003e\u003c!-- Internal air duct - 25% faster heat-up - extends element life --\u003e\u003c!-- 330 lbs stones (10 boxes, 3-5 cm rounded olivine) - DOUBLE the CLIFF's 165 lbs (5 boxes) --\u003e\u003c!-- 240V\/1PH | 50A circuit breaker | 6AWG wire (different from CLIFF 10.5kW: 30A\/10AWG) --\u003e\u003c!-- Max 230°F | SGS certified | Dimensions: 12.6\"W x 12.6\"D x 38.4\"H --\u003e\u003c!-- Optional STEEL-specific: Rail S safety railing | Reflect S (halves side clearances) | Flange CS bench embedding --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\n\u003ch2\u003eHUUM STEEL 11STU Pkg STEEL Series 10.5kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- Documents: STEEL IOM | STEEL Elements Required | UKU IOM | UKU Installation Diagram | UKU Installation Video | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .s1 { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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position: absolute; left: 4px; top: 16px; width: 6px; height: 6px; border-radius: 50%; background: #2563a8; }\n  .s1-feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }\n  .s1-feat { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 0.9rem 1rem; }\n  .s1-feat-title { font-weight: 700 !important; color: #0f172a !important; margin-bottom: 6px; display: flex; align-items: center; gap: 7px; line-height: 1.3; }\n  .s1-feat-title::before { content: \"\"; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; flex-shrink: 0; }\n  .s1-feat p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.6 !important; margin: 0; font-size: 14px; }\n  .s1-brand1, .s1-brand2 { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; padding: 1.5rem 0; }\n  .s1-brand-img { width: 100%; height: auto; border-radius: 8px; display: block; }\n  .s1-brand-tag { display: inline-block; font-size: 12px; font-weight: 600; letter-spacing: 0.09em; text-transform: uppercase; color: #2563a8; background: #e8f0fa; border: 1px solid #bfd4ef; border-radius: 4px; padding: 4px 10px; margin-bottom: 0.75rem; }\n  .s1-brand1 h4, .s1-brand2 h4 { font-size: 22px !important; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.75rem; line-height: 1.3 !important; }\n  .s1-brand1 p, .s1-brand2 p { font-weight: 500 !important; line-height: 1.75 !important; color: #0f172a !important; margin: 0 0 0.9rem; }\n  .s1-brand1 p:last-child, .s1-brand2 p:last-child { margin: 0; }\n  .s1-check { list-style: none; padding: 0; margin: 1rem 0 0; }\n  .s1-check li { font-weight: 500 !important; line-height: 1.6 !important; color: #0f172a !important; padding: 10px 0 10px 22px; position: relative; border-bottom: 1px solid #e2e8f0; }\n  .s1-check li:last-child { border-bottom: none; }\n  .s1-check li::before { content: \"\"; position: absolute; left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .s1-check li strong { color: #0f172a !important; font-weight: 700; }\n  .s1-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .s1-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .s1-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .s1-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0 0 0.75rem; }\n  .s1-warranty p:last-child { margin: 0; }\n  .s1-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .s1-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .s1-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .s1-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .s1-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .s1-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .s1-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .s1-feat-grid { grid-template-columns: 1fr 1fr; }\n    .s1-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .s1-brand1, .s1-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .s1-brand2 { display: flex; flex-direction: column-reverse; }\n    .s1-brand1 h4, .s1-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .s1 { padding: 0; }\n    .s1-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .s1-feat { padding: 0.8rem 0.9rem; }\n    .s1-inc-grid { grid-template-columns: 1fr; }\n    .s1-spec-grid { gap: 1.25rem; }\n    .s1-spec-table, .s1-spec-table tbody, .s1-spec-table tr, .s1-spec-table td { display: block; width: 100%; }\n    .s1-spec-table { border: none; }\n    .s1-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .s1-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .s1-spec-table td { border: none; padding: 1px 0; }\n    .s1-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .s1-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .s1-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"s1\"\u003e\n\u003cdiv class=\"s1-desc\"\u003e\n\u003cp\u003eThe HUUM STEEL 11STU Package is the complete ready-to-operate bundle for the 10.5kW STEEL electric sauna heater - covering the heater, UKU Local controller, UKU Extension Box, and 330 lbs of sauna stones (10 boxes, 3-5 cm rounded olivine) in a single order. The STEEL is a distinctly different product from the CLIFF: where the CLIFF is a slim, open-cage rectangular pillar 10.6\" wide and 6.3\" deep, the STEEL is an enclosed square stainless steel pillar measuring 12.6\" x 12.6\" - a larger footprint with dramatically more stone capacity. The CLIFF 10.5kW holds 165 lbs of stones (5 boxes). The STEEL 10.5kW holds 330 lbs (10 boxes) - exactly double. The additional stone mass produces softer, more even steam and longer-lasting heat per session. The STEEL 10.5kW covers sauna rooms from 353 to 600 cubic feet - the same room range as the CLIFF 11STU Pkg - but with twice the stone reserve and at a larger heater footprint. The 10.5kW STEEL requires a 50A circuit breaker and 6AWG wire, which is a larger electrical specification than the CLIFF 10.5kW (30A\/10AWG) - a key difference to confirm with your electrician before ordering. UKU Extension Box is required and included. Internal air duct increases heat-up speed by 25%. Max 230°F. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eWhat the package includes - heater, controller, Extension Box, and 330 lbs of stones\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 11STU Package (SKU 534-BDL-STEEL105STULBX) combines all four items needed to operate the STEEL 10.5kW in a single order. The STEEL heater has no built-in controls and requires a UKU controller for all operation. At 10.5kW, the UKU Extension Box is also required. Purchasing the STEEL 10.5 as a heater-only unit would leave the buyer to separately source the UKU controller, the UKU Extension Box, and 10 boxes of stones before the first session could run. This package includes all four items: heater, UKU Local controller, UKU Extension Box, and 330 lbs of stones (10 boxes, 3-5 cm rounded olivine). The buyer needs only to provide the electrical installation (240V\/1PH, 50A, 6AWG) and any optional STEEL accessories to complete the installation.\u003c\/p\u003e\n\u003ch4\u003eSTEEL vs CLIFF - same room range, double the stone capacity\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 10.5kW and the CLIFF 10.5kW both cover 353-600 cubic feet at 10.5kW output. The differences between them are form factor and stone capacity. The CLIFF is a slim open-cage rectangular pillar (10.6\" x 6.3\") that puts the stones on open visual display through the recycled cage ribs. The STEEL is an enclosed square pillar (12.6\" x 12.6\") with a stainless steel outer casing that encloses the stone column inside a cavity - the stones are less visually exposed than in the CLIFF. The STEEL holds 330 lbs (10 boxes, 3-5 cm) vs the CLIFF's 165 lbs (5 boxes). HUUM's description of the consequence: the more stones there are, the softer the steam is rather than sharp steam - because each stone's temperature is lower when more stones share the heat load, producing softer, more even steam. The STEEL also carries a different electrical requirement: 50A\/6AWG vs the CLIFF's 30A\/10AWG at the same 10.5kW output. Safety clearances at 10.5kW for the STEEL are 4\" (10 cm) at the sides - the same numeric clearance as the CLIFF 10.5kW, but achieved by a different optimized structural design.\u003c\/p\u003e\n\u003ch4\u003eSTEEL and CLIFF - one material source, two design platforms\u003c\/h4\u003e\n\u003cp\u003eHUUM's description of the STEEL and CLIFF relationship is direct: these two sauna heaters are produced from the same stainless steel sheet. The fins of the CLIFF sauna heater are made from the cutouts of STEEL sauna heaters, which ensures that all material is utilized and there is no excessive waste. The recycled-cutout origin of the CLIFF's open cage ribs is the same story from the other side: the STEEL's stainless steel body produces the rectangular cutouts that become the CLIFF's signature cage structure. Both are manufactured from the same material, in the same Estonian facility, with no excess production waste between them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-hook\"\u003e10.5kW electric sauna heater package for rooms from 353 to 600 cubic feet. STEEL 11STU Pkg - complete package: STEEL 10.5kW heater, UKU Local controller, UKU Extension Box (required for 10.5kW), and 330 lbs stones (10 boxes, 3-5 cm rounded olivine). STEEL vs CLIFF: same room range and output - STEEL holds 330 lbs stones (10 boxes) vs CLIFF's 165 lbs (5 boxes) - double the stone capacity for softer, longer-lasting steam. Enclosed square stainless steel pillar - 12.6\"W x 12.6\"D x 38.4\"H. Internal air duct - 25% faster heat-up. Safety distances: 4\" (10 cm) sides. Optional Reflect S halves clearances. Max 230°F. 240V\/1PH - 50A circuit breaker - 6AWG (note: larger electrical than CLIFF 10.5kW which is 30A\/10AWG). Optional: Rail S safety railing; Reflect S reflector panel; Flange CS bench embedding. Pallet delivery required. SGS certified. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"s1-badges\"\u003e\n\u003cspan class=\"s1-badge\"\u003e10.5 kW\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003e353 to 600 cu ft\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eComplete package - heater, UKU Local, Extension Box, and 330 lbs stones\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eUKU Local controller included\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eUKU Extension Box included (required for 10.5kW)\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003e330 lbs stones included (10 boxes, 3-5 cm rounded olivine)\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eDouble the stone capacity of CLIFF 10.5kW (330 vs 165 lbs)\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eEnclosed square stainless steel pillar - 12.6\"W x 12.6\"D\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eSafety: 4\" (10 cm) sides\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eOptional Reflect S - halves side clearances\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eMax 230°F\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003e240V\/1PH - 50A - 6AWG\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"s1-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"s1-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"s1-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003ePackage contents\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeater\u003c\/td\u003e\n\u003ctd\u003eHUUM STEEL 10.5kW electric sauna heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController (included)\u003c\/td\u003e\n\u003ctd\u003eUKU Local controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtension Box (included)\u003c\/td\u003e\n\u003ctd\u003eUKU Extension Box - required for 10.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones (included)\u003c\/td\u003e\n\u003ctd\u003e330 lbs \/ 150 kg (10 boxes, 3-5 cm rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e10.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e353 to 600 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs \/ 150 kg (10 boxes, 3-5 cm) - included in package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e3-5 cm rounded olivine (1-2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct benefit\u003c\/td\u003e\n\u003ctd\u003e25% faster heat-up - extends element life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam type\u003c\/td\u003e\n\u003ctd\u003eSoft, even steam - double stone mass vs CLIFF 10.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003eSTEEL vs CLIFF - form and stone comparison\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL form\u003c\/td\u003e\n\u003ctd\u003eEnclosed square stainless steel pillar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF form\u003c\/td\u003e\n\u003ctd\u003eSlim open recycled-cage rectangle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL width x depth\u003c\/td\u003e\n\u003ctd\u003e12.6 in x 12.6 in (320mm x 320mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF width x depth\u003c\/td\u003e\n\u003ctd\u003e10.6 in x 6.3 in (270mm x 160mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL stones (10.5kW)\u003c\/td\u003e\n\u003ctd\u003e330 lbs - 10 boxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF stones (10.5kW)\u003c\/td\u003e\n\u003ctd\u003e165 lbs - 5 boxes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL electrical (10.5kW)\u003c\/td\u003e\n\u003ctd\u003e50A \/ 6AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF electrical (10.5kW)\u003c\/td\u003e\n\u003ctd\u003e30A \/ 10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003eSafety distances\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides (10.5kW STEEL)\u003c\/td\u003e\n\u003ctd\u003e4 in (10 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW side clearance (ref.)\u003c\/td\u003e\n\u003ctd\u003e2 in (5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith Reflect S panel\u003c\/td\u003e\n\u003ctd\u003eSide distances can be halved (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding minimum\u003c\/td\u003e\n\u003ctd\u003eMin. 21.7 in (550mm) must protrude above bench surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eEnclosed square - larger footprint than CLIFF\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003eElectrical (STEEL 10.5kW)\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e50A dedicated circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e6AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNote vs CLIFF 10.5kW\u003c\/td\u003e\n\u003ctd\u003eSTEEL requires 50A\/6AWG (CLIFF 10.5kW: 30A\/10AWG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired for 10.5kW - included in this package\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-spec-block\"\u003e\n\u003ch4\u003eUKU Local controller (included) and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"s1-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eController type\u003c\/td\u003e\n\u003ctd\u003eUKU Local - physical wall panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote \/ app control\u003c\/td\u003e\n\u003ctd\u003eNot available (UKU Local - no Wi-Fi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWi-Fi upgrade\u003c\/td\u003e\n\u003ctd\u003eUKU Wi-Fi controller available separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eRail S (STEEL-specific, light wood profiles) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eReflect S (STEEL-specific, halves side clearances) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eFlange CS (CLIFF\/STEEL shared) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"s1-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"s1-inc-grid\"\u003e\n\u003cdiv class=\"s1-inc-item\"\u003eHUUM STEEL 10.5kW floor-mounted electric sauna heater - enclosed square stainless steel pillar\u003c\/div\u003e\n\u003cdiv class=\"s1-inc-item\"\u003eUKU Local controller (wall panel)\u003c\/div\u003e\n\u003cdiv class=\"s1-inc-item\"\u003eUKU Extension Box (required for 10.5kW - included)\u003c\/div\u003e\n\u003cdiv class=\"s1-inc-item\"\u003e330 lbs sauna stones (10 boxes, 3-5 cm rounded olivine)\u003c\/div\u003e\n\u003cdiv class=\"s1-inc-item\"\u003eSTEEL Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"s1-inc-item\"\u003eUKU Installation and Operation Manual\u003c\/div\u003e\n\u003cdiv class=\"s1-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e Licensed electrician for wiring (240V\/1PH, 50A circuit breaker, 6AWG wire). An additional box of stones is recommended. \u003cstrong\u003eOptional accessories (sold separately - STEEL-specific):\u003c\/strong\u003e Rail S safety railing (light wood profiles); Reflect S reflector panel (halves side clearances); Flange CS bench embedding flange (min. 21.7 in \/ 550mm must protrude above bench). UKU Wi-Fi controller available separately as upgrade to included UKU Local.\u003c\/p\u003e\n\u003chr class=\"s1-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL 11STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"s1-feat-grid\"\u003e\n\u003cdiv class=\"s1-feat\"\u003e\n\u003cdiv class=\"s1-feat-title\"\u003e330 lbs of stones - double the CLIFF at the same 10.5kW output\u003c\/div\u003e\n\u003cp\u003eThe STEEL 10.5kW holds 330 lbs of stones (10 boxes) vs the CLIFF 10.5kW's 165 lbs (5 boxes) - exactly double, at the same output and same room range. HUUM's explanation of why more stones produce better steam: each stone's temperature is lower the more stones share the heat load, producing softer, more even steam rather than sharp steam. A ladle of water poured over 330 lbs of stones at a lower individual stone temperature produces a gentler, wider cloud of steam than the same ladle over 165 lbs of hotter stones. For bathers who prioritize soft, enveloping steam over rapid heat-up, the STEEL's larger stone mass is the decisive specification advantage over the CLIFF at equivalent output.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-feat\"\u003e\n\u003cdiv class=\"s1-feat-title\"\u003eComplete package - heater, controller, Extension Box, and all 10 boxes of stones\u003c\/div\u003e\n\u003cp\u003eThe STEEL 11STU Package combines all four items needed to operate the STEEL 10.5kW into a single order. The heater has no built-in controls and requires a UKU controller. At 10.5kW, the Extension Box is mandatory. And 10 boxes of stones must be sourced before the first session. Purchasing the heater alone leaves all three as separate orders. This package includes everything: STEEL 10.5kW heater, UKU Local controller, UKU Extension Box, and all 330 lbs of stones. The only remaining requirement after delivery is the licensed electrician for the 240V\/1PH, 50A, 6AWG wiring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-feat\"\u003e\n\u003cdiv class=\"s1-feat-title\"\u003e50A \/ 6AWG - the key electrical distinction from CLIFF packages\u003c\/div\u003e\n\u003cp\u003eThe STEEL 10.5kW requires a 50A dedicated circuit and 6AWG wire. This is a meaningfully larger electrical requirement than the CLIFF 10.5kW (30A\/10AWG) and the CLIFF 9kW (30A\/10AWG). For buyers comparing STEEL and CLIFF at the same 10.5kW output, this electrical difference is the most critical planning distinction: a dedicated 50A\/6AWG circuit rather than a 30A\/10AWG circuit. Confirm this with your licensed electrician before ordering. If the existing panel capacity is limited to 30A circuits, the CLIFF 11STU Pkg would be the more practical specification at equivalent output and room range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-feat\"\u003e\n\u003cdiv class=\"s1-feat-title\"\u003e4\" side clearances and Reflect S halving option\u003c\/div\u003e\n\u003cp\u003eThe STEEL 10.5kW requires 4\" (10 cm) at the sides from combustible materials - the same numeric clearance as the CLIFF 10.5kW, achieved by the STEEL's well-optimized structural design. For installations where even 4\" of clearance is tight, the optional Reflect S reflector panel (sold separately, STEEL-specific) can halve the side clearances. The STEEL 6kW achieves 2\" side clearances - the 10.5kW's 4\" reflects the proportionally larger output at the same slim design principle. At 12.6\" x 12.6\", the STEEL's square footprint is larger than the CLIFF but still compact for the 330-lb stone load it carries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-feat\"\u003e\n\u003cdiv class=\"s1-feat-title\"\u003eInternal air duct and direct element-stone contact\u003c\/div\u003e\n\u003cp\u003eThe STEEL 10.5kW includes the internal air duct that HUUM fits across the STEEL platform - channeling air through the stone cavity to increase heating speed by up to 25% and reduce thermal stress on the heating elements, extending their service life. The stones are in direct contact with the heating elements for maximum heat transfer efficiency from element surface to stone mass. HUUM's description: the unit is engineered so that the sauna stones are in direct contact with the heating elements for more efficient heat transference. At 330 lbs, the STEEL's stone column benefits more from the air duct's directed airflow than the CLIFF's smaller stone load.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-feat\"\u003e\n\u003cdiv class=\"s1-feat-title\"\u003eSTEEL and CLIFF - paired platforms from one material source\u003c\/div\u003e\n\u003cp\u003eThe STEEL 11STU Package covers the 10.5kW configuration of the STEEL platform. The STEEL is available as: STEEL 6 (6kW, 212-353 cu ft, heater only H1006012 - 330 lbs stones sold separately, 30A\/10AWG) and STEEL 10.5 in this package (10.5kW, 353-600 cu ft, complete package, 50A\/6AWG). The STEEL Mini 4 (3.5kW, wall-mounted, much smaller) is a separate product. HUUM produces the CLIFF and STEEL from the same stainless steel sheet, with the CLIFF's cage fins fabricated from the cutouts of STEEL manufacturing. Both platforms share the same stone-primary philosophy, SGS certification, and 5-year warranty. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"s1-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"s1-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"s1-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/SteelPKG1.jpg?v=1779381989\u0026amp;width=800\" alt=\"HUUM STEEL 11STU Package 534-BDL-STEEL105STULBX 10.5kW electric sauna heater 353-600 cu ft 330 lbs stones UKU Local Extension Box enclosed stainless pillar\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"s1-brand-tag\"\u003eDesigned in Estonia - SGS Certified - STEEL Series - Complete Package - Double Stone Capacity\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 11STU Pkg. 10.5kW. 353-600 cu ft. 330 lbs stones (10 boxes). Heater, UKU Local, Extension Box.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL 11STU Package is the complete ready-to-operate bundle for the STEEL 10.5kW electric sauna heater. Enclosed square stainless steel pillar, 330 lbs stones (10 boxes - double the CLIFF's capacity), UKU Local controller, UKU Extension Box, and internal air duct (25% faster heat-up) all included. 50A\/6AWG wiring required. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"s1-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e10.5kW electric\u003c\/strong\u003e - 353-600 cu ft - enclosed square stainless steel pillar\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e330 lbs stones included (10 boxes)\u003c\/strong\u003e - double the CLIFF 10.5kW stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Local + UKU Extension Box included\u003c\/strong\u003e - all required components\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e4\" side clearances - Reflect S halves distances (sold separately)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e50A\/6AWG required - SGS certified - 5-year warranty (excl. elements)\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"s1-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"s1-brand-tag\"\u003eSTEEL 11STU Pkg vs CLIFF 11STU Pkg vs STEEL 6 - choosing between STEEL and CLIFF\u003c\/span\u003e\n\u003ch4\u003eSTEEL 11STU Pkg vs CLIFF 11STU Pkg vs STEEL 6 - stone capacity, form, and electrical\u003c\/h4\u003e\n\u003cp\u003eThree HUUM electric configurations serve the 353-600 cu ft range and the STEEL platform. STEEL 6 H1006012 (heater only): 6kW, 212-353 cu ft, 12.6\"W x 12.6\"D enclosed square pillar, 330 lbs stones sold separately, 2\" side clearances, 30A\/10AWG, no Extension Box. Right for smaller rooms where the STEEL's large stone capacity and enclosed format are priorities, with components sourced independently. CLIFF 11STU Pkg (534-BDL-CLIFF105STULBX): 10.5kW, 353-600 cu ft, slim open-cage pillar 10.6\"W x 6.3\"D, 165 lbs stones (5 boxes) included, 4\" sides, 30A\/10AWG, UKU Local + Extension Box included. Right when the CLIFF's slim open-cage Red Dot Award design, lower electrical requirement (30A vs 50A), and complete package are the priorities. STEEL 11STU Pkg 534-BDL-STEEL105STULBX (this listing): 10.5kW, 353-600 cu ft, enclosed square pillar 12.6\"W x 12.6\"D, 330 lbs stones (10 boxes) included, 4\" sides, 50A\/6AWG, UKU Local + Extension Box included. Right when maximum stone capacity (330 lbs), softer steam, and the enclosed stainless steel aesthetic are the priority over the CLIFF's slimmer cage form and lower electrical requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"s1-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-steel-105kw-electric-heater-package-steel-105stu-pkg-uku-local-black-7198692_751x1127_3cc0d053-b06f-4219-8615-019ae1262da2.jpg?v=1779649643\u0026amp;width=800\" alt=\"HUUM STEEL 11STU Package 330 lbs stones vs CLIFF 11STU 165 lbs vs STEEL 6 smaller room comparison\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"s1-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"s1-manual\"\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eSTEEL Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e STEEL Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eSTEEL Elements Required\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e STEEL Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Video\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/www.bathingbrands.com\/57746\/huum\/steel-11stu-pkg\/sauna-heater-kits\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Video \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"s1-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"s1-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"s1-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL 10.5kW carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of incorrect stone type or size (decorative stones must not be used; use only rounded olivine 3-5 cm in the STEEL), operating without the required stone load, or damage from inadequate electrical installation (50A circuit breaker and 6AWG wire required). The UKU Local controller and UKU Extension Box included in the package carry their own separate HUUM product warranty terms. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52390333874458,"sku":"534-BDL-STEEL105STULBX","price":4253.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52390333907226,"sku":"534-BDL-STEEL105STULBWDX","price":4566.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52390333939994,"sku":"534-BDL-STEEL105STUWBX","price":4515.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52390333972762,"sku":"534-BDL-STEEL105STUWBWDX","price":4828.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52390334005530,"sku":"534-BDL-STEEL105STUWGX","price":4915.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52390334038298,"sku":"534-BDL-STEEL105STUWGDX","price":4690.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Mirror","offer_id":52390334071066,"sku":"534-BDL-STEEL105STUWMRX","price":5178.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelPKG1.jpg?v=1779381989"},{"product_id":"huum-cliff-11-cliff-series-11kw-sauna-heater","title":"HUUM CLIFF 11 CLIFF Series 11kW Sauna Heater","description":"\u003cp\u003e\u003c!-- HUUM CLIFF 11 - 11kW Floor-Standing Sauna Heater, Natural Stone Surface - Standalone --\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM CLIFF 11 CLIFF Series 11kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- SKU: H1004032 | CLIFF Series | 354-566 cu ft | Natural stone exterior | Heater only --\u003e\u003c!-- External control required | UKU Extension Box required (not included - in PKG only) --\u003e\u003c!-- Stones: 165 lbs (5 boxes) 1\"-2\" rounded olivine - sold separately --\u003e\u003c!-- 50A \/ 6 AWG | Floor-standing | Red Dot Award | SGS Listed | Made in Estonia --\u003e\u003c!-- 5-year warranty (elements excluded) --\u003e\u003c!-- 6 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM CLIFF 11 is an 11kW floor-standing electric sauna heater for rooms from 354 to 566 cubic feet, with a natural stone surface exterior. This listing is the heater only. A UKU control unit, UKU Extension Box, and sauna stones are all required for operation and sold separately. The CLIFF 11 is the highest-output model in the CLIFF floor-standing series, sharing the same natural stone exterior, slender tower profile, 165-lb stone capacity, and Red Dot Award-winning design as the CLIFF 6 and CLIFF 9 - now for the 354-566 cu ft room range on a 50A \/ 6 AWG circuit with an Extension Box required. For a complete installation including control, Extension Box, and stones in a single purchase, see the HUUM CLIFF 11STU Package listing at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eNatural stone surface - the CLIFF aesthetic at 11kW\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF heater is defined by its natural stone exterior - actual natural stone panels covering the slender tower body that give the heater the visual character of a Nordic cliff face. The Red Dot Award-winning design principle is that the heater should be a stone element in the sauna room rather than a metal appliance. This design is fully present at 11kW: the same natural stone exterior, the same slim rectangular tower profile, the same minimal footprint, and the same CLIFF aesthetic as the 6 and 9kW models. For buyers who want the CLIFF's distinctive look in a larger sauna room from 354 to 566 cubic feet, the CLIFF 11 delivers it. The UKU Extension Box is required at 11kW and is included in the CLIFF 11STU Package but must be purchased separately when ordering this standalone heater.\u003c\/p\u003e\n\u003ch4\u003eUKU Extension Box required - the critical difference from CLIFF 6 and 9\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 6 (30A \/ 10 AWG) and CLIFF 9 (50A \/ 8 AWG) both operate directly from the UKU control without an Extension Box. The CLIFF 11 at 11kW requires a UKU Extension Box - this is the defining installation difference between the CLIFF 11 and the lower-output CLIFF models. The Extension Box mounts on the wall outside the sauna room and manages the connection between the 11kW heater load and the UKU control panel. When ordering the standalone heater (this listing), the Extension Box must be purchased separately alongside the UKU control and stones. The CLIFF 11STU Package includes the heater, UKU Local Black or WiFi control, Extension Box, and 165 lbs of stones in a single bundled purchase.\u003c\/p\u003e\n\u003ch4\u003e165 lbs of 1\"-2\" stones - the CLIFF-specific specification\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 11 carries the same 165-lb stone capacity as the CLIFF 6 and CLIFF 9, in the same CLIFF-specific 1\"-2\" (3-5 cm) rounded olivine diabase stone size. This smaller stone size is different from the 2\"-4\" stones used in the DROP, HIVE, and STEEL series and must not be substituted. The removable internal basket ribs make loading and precisely placing 165 lbs of small stones into the narrow tower basket practical. The integrated internal air duct reduces heat-up time by approximately 25% by directing airflow efficiently through the stone mass from switch-on, and extends element life by improving airflow distribution during warm-up.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e11kW floor-standing sauna heater for rooms from 354 to 566 cubic feet. Natural stone surface exterior - Red Dot Award-winning CLIFF design. Slender tower, minimal footprint. 165 lbs stone capacity. 1\"-2\" rounded olivine (CLIFF-specific stone size). Internal air duct - 25% faster heat-up. Removable ribs for precise stone loading. Required (all sold separately): UKU control (Local Black or WiFi); UKU Extension Box; 165 lbs stones (5 boxes 1\"-2\" rounded olivine). Single 50A breaker, 6 AWG wire. 240V \/ 1-phase. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See CLIFF 11STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e11 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e354 to 566 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNatural stone surface exterior - Red Dot Award design\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlender floor-standing tower\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e165 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e1\"-2\" rounded olivine - CLIFF-specific stone size\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eRemovable ribs for stone loading\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box required - sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e165 lbs stones (5 boxes) sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 6 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-notice-yellow\"\u003e⚠️ \u003cstrong\u003eThree components required for operation - all sold separately:\u003c\/strong\u003e (1) UKU control unit (Local Black or WiFi); (2) UKU Extension Box - required at 11kW, not needed for CLIFF 6 or 9; (3) 165 lbs sauna stones - 5 boxes of 1\"-2\" rounded olivine (CLIFF-specific size). See the \u003cstrong\u003eCLIFF 11STU Package\u003c\/strong\u003e listing for a single bundled purchase including all three.\u003c\/div\u003e\n\u003cdiv class=\"sl-notice-yellow\"\u003e⚠️ \u003cstrong\u003eCLIFF stone size: 1\"-2\" (3-5 cm) - different from DROP, HIVE, and STEEL.\u003c\/strong\u003e The CLIFF requires 1\"-2\" (3-5 cm) rounded olivine stones. Do not use 2\"-4\" stones from DROP, HIVE, or STEEL packages in the CLIFF basket - incorrect stone size restricts airflow and can damage elements.\u003c\/div\u003e\n\u003cdiv class=\"sl-notice\"\u003eℹ️ \u003cstrong\u003eCLIFF 11 vs CLIFF 9 - the Extension Box threshold.\u003c\/strong\u003e CLIFF 9 (318-530 cu ft, 50A \/ 8 AWG): no Extension Box required. CLIFF 11 (354-566 cu ft, 50A \/ 6 AWG): UKU Extension Box required. For rooms 354-530 cu ft in the overlap zone, the CLIFF 9 is adequate for standard well-insulated rooms and does not require the Extension Box. The CLIFF 11 provides more output headroom for cold surfaces or high-frequency use and requires the Extension Box. Both use 50A breakers; wire gauge differs (8 AWG for CLIFF 9, 6 AWG for CLIFF 11).\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e11 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e45.8 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e6 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - sold separately (included in PKG)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e354 to 566 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e1\" to 2\" (3-5 cm) rounded - CLIFF-specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior surface\u003c\/td\u003e\n\u003ctd\u003eNatural stone - Nordic cliff face aesthetic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlender vertical tower - floor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone loading\u003c\/td\u003e\n\u003ctd\u003eRemovable ribs for easier precise loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign award\u003c\/td\u003e\n\u003ctd\u003eRed Dot Award winner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRequired components (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired at 11kW - mount outside sauna room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes) 1\"-2\" rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eCLIFF floor-standing series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 11kW (this)\u003c\/td\u003e\n\u003ctd\u003e354-566 cu ft | 50A \/ 6 AWG | Ext box required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll CLIFF models\u003c\/td\u003e\n\u003ctd\u003eNatural stone surface | 165 lbs | 1\"-2\" olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1004032\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM CLIFF 11kW floor-standing sauna heater - natural stone surface exterior\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (all sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); UKU Extension Box (required at 11kW); 165 lbs sauna stones - 5 boxes 1\"-2\" rounded olivine (CLIFF-specific size). \u003cstrong\u003eSee also:\u003c\/strong\u003e CLIFF 11STU Package for a bundled purchase including all required components. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CLIFF 11 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eNatural stone surface at 11kW - top of the CLIFF series\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 11 brings the natural stone exterior and Red Dot Award-winning design of the CLIFF family to rooms from 354 to 566 cubic feet - the largest room range in the floor-standing CLIFF series. The same natural stone panels, the same slender tower body, and the same minimal footprint as the CLIFF 6 and 9 - now with 11kW output and the UKU Extension Box for the larger room range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eExtension Box required - plan before ordering\u003c\/div\u003e\n\u003cp\u003eThe UKU Extension Box is a required component for the CLIFF 11 and must be purchased alongside the control and stones when ordering this standalone heater. It is not required for CLIFF 6 or 9. The CLIFF 11STU Package includes the Extension Box, making it the simpler single-purchase path. For buyers ordering components separately, confirm all three required items - control, Extension Box, and stones - are in the order before completing the purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e50A \/ 6 AWG - heavier wire than CLIFF 9\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 11 shares the 50A breaker requirement with the CLIFF 9 but requires 6 AWG wire rather than the CLIFF 9's 8 AWG. For installations where an 8 AWG wire run is already planned or in place for a CLIFF 9 consideration, stepping up to the CLIFF 11 requires the heavier 6 AWG specification. Confirm wire gauge with a licensed electrician before ordering.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e165 lbs of 1\"-2\" stone - same as CLIFF 6 and 9\u003c\/div\u003e\n\u003cp\u003eAll three CLIFF floor-standing models carry the same 165-lb stone load in the same CLIFF-specific 1\"-2\" (3-5 cm) rounded olivine size. At 11kW, more output driving the same stone mass produces faster heat-up in the larger 354-566 cu ft room range. The removable basket ribs and integrated air duct are the same across all three CLIFF output levels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e354-566 cu ft - the top CLIFF floor-standing range\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 11 is the appropriate choice for rooms from 354 to 566 cubic feet where the CLIFF 9's 530 cu ft ceiling is insufficient, or where the room has cold surfaces - glass walls, tile floors, masonry cladding - that push the adjusted cubic footage above what the 9kW can manage effectively. For standard well-insulated rooms in the 354-530 cu ft overlap with the CLIFF 9, either model can serve the room; the CLIFF 11 provides output headroom.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eCLIFF 11STU Package - the complete purchase path\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 11STU Package at BathingBrands bundles the CLIFF 11 heater, UKU control (Local Black or WiFi at checkout), UKU Extension Box, and 165 lbs of 1\"-2\" rounded olivine stones in a single purchase. For buyers who want all required components together without sourcing them separately, the Package is the more straightforward option. This standalone listing is for buyers replacing a heater in an existing installation or purchasing components individually.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM CLIFF 11kW floor-standing sauna heater natural stone surface exterior slender tower Red Dot Award design\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-cliff-main_180f43fd-fbba-4e1d-b2b2-e8f4592c4653.jpg?v=1779660785\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - Red Dot Award winner\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF 11. 11kW. 354-566 cu ft. Natural stone surface. Top of the CLIFF floor-standing series.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CLIFF 11 is the top-output model in the CLIFF floor-standing series - the same Red Dot Award-winning natural stone exterior, slender tower profile, 165-lb stone capacity, 1\"-2\" stone specification, removable basket ribs, and integrated air duct as the CLIFF 6 and 9, now at 11kW for rooms from 354 to 566 cubic feet with the UKU Extension Box required. This listing is the heater only. UKU control, UKU Extension Box, and 165 lbs of 1\"-2\" stones are required and sold separately. See the CLIFF 11STU Package for a complete bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e11kW, 354-566 cu ft\u003c\/strong\u003e - single 50A \/ 6 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNatural stone surface\u003c\/strong\u003e - Red Dot Award, same tower as CLIFF 6 and 9\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Extension Box required\u003c\/strong\u003e - not needed for CLIFF 6 or 9\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e165 lbs 1\"-2\" stones, removable ribs, internal air duct\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLIFF 11STU Package available\u003c\/strong\u003e - includes control, ext box, and stones\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eCLIFF 11 standalone vs CLIFF 11STU Package\u003c\/span\u003e\n\u003ch4\u003eStandalone heater vs CLIFF 11STU Package - which to order\u003c\/h4\u003e\n\u003cp\u003eThis listing is the CLIFF 11 heater only. For the CLIFF 11 to operate, three additional components are required: a UKU control unit (Local Black or WiFi), a UKU Extension Box, and 165 lbs of 1\"-2\" rounded olivine stones in 5 boxes. All three are sold separately at BathingBrands. The CLIFF 11STU Package listing bundles all four components (heater, control, Extension Box, and stones) in a single purchase with one checkout. The standalone heater listing is appropriate for buyers replacing a heater only in an existing CLIFF 11 installation, or for buyers who already have some components and need only the heater. For most new installations, the CLIFF 11STU Package is the more convenient and complete purchase path. Stone size confirmation: only 1\"-2\" (3-5 cm) rounded olivine diabase stones must be used in the CLIFF 11 basket - do not use 2\"-4\" stones from DROP, HIVE, or STEEL packages. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM CLIFF 11kW standalone heater versus CLIFF 11STU Package showing components included in each purchase option\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-cliff-electric-sauna-heater_1.jpg?v=1779660792\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF 11 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect stone type or size (2\"-4\" stones must not be used - 1\"-2\" stones required), operating without the required stone load, operating without the required UKU Extension Box, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52279372448026,"sku":"H1004032","price":2879.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-cliff-main_180f43fd-fbba-4e1d-b2b2-e8f4592c4653.jpg?v=1779660785"},{"product_id":"huum-steel-9-steel-series-9-0kw-sauna-heater","title":"HUUM STEEL 9 STEEL Series 9.0kW Sauna Heater","description":"\u003c!-- HUUM STEEL 9 - 9kW Floor-Standing Slim Stainless Steel Sauna Heater - Standalone --\u003e\u003c!-- SKU: H1006022 | STEEL Series | 318-530 cu ft | Slim stainless tower | Heater only --\u003e\u003c!-- 6 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; color: #1a2a3a; max-width: 900px; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM STEEL 9 STEEL Series 9.0kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM STEEL 9 is a 9kW floor-standing electric sauna heater for rooms from 318 to 530 cubic feet, in a slim brushed stainless steel tower. This listing is the heater only. A UKU control unit and sauna stones are required for operation and sold separately. No UKU Extension Box is required for the 9kW output level. The STEEL 9 is the mid-range model in the HUUM STEEL floor-standing series - the step up from the STEEL 6 (177-318 cu ft) for rooms from 318 to 530 cubic feet, and the step down from the STEEL 10.5 (353-706 cu ft) for rooms that don't require the 10.5kW's output or Extension Box. All three STEEL floor-standing models share the same slim rectangular stainless tower body, 330-lb stone capacity, integrated air duct, and adjustable legs. For a complete installation including control and stones in a single purchase, see the HUUM STEEL 9STU Package listing at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eSTEEL design - slim stainless tower, 330 lbs of stone\u003c\/h4\u003e\n\u003cp\u003eThe HUUM STEEL heater is a slim, brushed stainless steel rectangular tower that stands on the sauna floor with 4\" (10 cm) clearance from the surrounding walls. Despite its relatively compact footprint, it carries 330 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones - substantially more stone mass than most comparably sized wall-mounted heaters and more than many other floor-standing heaters at this output level. The slim rectangular profile fits naturally against a sauna wall or in a corner without requiring as much bench clearance as wider cylindrical or boxy heater forms. The integrated internal air duct reduces heat-up time by approximately 25% from switch-on and extends element service life by directing airflow efficiently through the 330-lb stone mass during the warm-up cycle. Adjustable legs allow fine-tuning of the heater's level position on the sauna floor. An optional embedding flange (sold separately) enables bench-embedding installation where the heater is set into the bench structure rather than standing free on the floor.\u003c\/p\u003e\n\u003ch4\u003e9kW mid-range STEEL - no Extension Box required\u003c\/h4\u003e\n\u003cp\u003eThe STEEL floor-standing series has three output levels: 6kW (177-318 cu ft, 30A \/ 10 AWG, 2\" clearance, no Extension Box), 9kW (318-530 cu ft, 50A \/ 8 AWG, 4\" clearance, no Extension Box), and 10.5kW (353-706 cu ft, 50A \/ 8 AWG, 4\" clearance, Extension Box required). The STEEL 9 is the mid-range model - the heavier electrical specification than the STEEL 6 (stepping from 30A \/ 10 AWG to 50A \/ 8 AWG) but without the Extension Box requirement that the STEEL 10.5 adds. For rooms from 318 to 530 cubic feet where the STEEL 6's 318 cu ft ceiling is insufficient, the STEEL 9 is the correctly matched STEEL model without the additional Extension Box hardware. A licensed electrician is required for the 50A \/ 8 AWG connection. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of 2\"-4\" stones - correct STEEL specification\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 9 requires 330 lbs (10 boxes) of 2\"-4\" (5-10 cm) rounded olivine diabase stones - the standard HUUM stone specification used across the DROP, HIVE, and STEEL series. This stone size is different from the 1\"-2\" stones required by the CLIFF series. Stones are not included in this listing and must be purchased separately. The Stone Requirements document below specifies the exact type and placement guidance. Do not use CLIFF-specification 1\"-2\" stones in the STEEL basket - the different basket geometry and element configuration are designed for the 2\"-4\" stone size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e9kW floor-standing electric sauna heater for rooms from 318 to 530 cubic feet. Slim brushed stainless steel tower. Mid-range STEEL - between the 6kW and 10.5kW models. No UKU Extension Box required. UKU control (Local Black or WiFi) sold separately. Stones: 330 lbs (10 boxes) 2\"-4\" rounded olivine (sold separately). Single 50A breaker, 8 AWG wire. 4\" safety clearance from walls. Integrated air duct - 25% faster heat-up. Adjustable legs. Bench-embedding possible. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See STEEL 9STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 530 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlim brushed stainless steel tower\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eMid-range STEEL - no Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine (10 boxes) sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e4\" safety clearance from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eAdjustable legs\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 530 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (10 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical and clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlim rectangular stainless steel tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e4\" (10 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eBrushed stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSTEEL floor-standing series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 2\" clearance | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 9kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 4\" clearance | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 10.5kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 4\" clearance | Ext box required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll models\u003c\/td\u003e\n\u003ctd\u003eSame slim stainless tower | 330 lbs stones\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1006022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM STEEL 9kW floor-standing sauna heater - slim brushed stainless steel tower\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); 330 lbs sauna stones - 10 boxes 2\"-4\" rounded olivine (see Stone Requirements document). \u003cstrong\u003eOptional (sold separately):\u003c\/strong\u003e HUUM STEEL safety railing (recommended), embedding flange (for bench mounting), reflector panels. \u003cstrong\u003eSee also:\u003c\/strong\u003e STEEL 9STU Package for a bundled purchase. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL 9 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e9kW mid-range - no Extension Box\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 covers rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit without requiring the UKU Extension Box that the STEEL 10.5 needs. For rooms in this range where the STEEL 6's 318 cu ft ceiling is insufficient, the STEEL 9 is the simplest complete STEEL installation: control plus heater plus stones, with no additional Extension Box hardware to source and mount.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs of stone in a slim tower\u003c\/div\u003e\n\u003cp\u003eDespite its slim rectangular profile and relatively modest 4\" wall clearances, the STEEL 9 carries 330 lbs of 2\"-4\" rounded olivine stones - more stone mass than most wall-mounted heaters at this output and substantially more than compact floor-standing alternatives. The large stone load provides sustained heat and soft, long-lasting steam throughout the session, including recovery between back-to-back uses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe internal air duct directs airflow efficiently through the 330-lb stone mass from the start of every heating cycle, reducing heat-up time by approximately 25% and extending element life by distributing airflow evenly during warm-up. For a 318-530 cu ft room at 9kW, the air duct advantage means a meaningfully shorter wait from switch-on to bathing temperature compared to heaters without internal ducting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e4\" from walls - fits mid-size room layouts\u003c\/div\u003e\n\u003cp\u003eThe 4\" (10 cm) wall clearance of the STEEL 9 is the same as the STEEL 10.5 - minimal for a 9kW floor-standing heater with 330 lbs of stones. Corner and wall placement options in mid-size sauna rooms from 318 to 530 cu ft are more flexible with 4\" clearances than with heaters that require 6\" or more, giving designers more latitude in bench and heater positioning.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eAdjustable legs and bench-embedding option\u003c\/div\u003e\n\u003cp\u003eThe adjustable legs allow precise levelling of the STEEL 9 on uneven sauna floors - practical in cabin saunas, older buildings, or timber-framed rooms where the floor may not be perfectly level. The optional embedding flange (sold separately) enables bench-embedding installation, setting the heater body into the bench structure for a more integrated appearance and access to the stones from bench level.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSTEEL 9STU Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9STU Package at BathingBrands bundles the STEEL 9 heater, UKU control (Local Black or WiFi at checkout), and 330 lbs of stones (10 boxes) in a single purchase. This standalone heater listing is for buyers replacing the heater only in an existing STEEL installation, or purchasing components in separate transactions. For most new installations, the Package is the more convenient path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM STEEL 9kW floor-standing slim stainless steel tower sauna heater 330 lbs stone capacity 4 inch clearance\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-steel-series-electric-sauna-heater-9kw-sauna-heater-supply-438124.jpg?crop=center\u0026amp;height=1067\u0026amp;v=1779522914\u0026amp;width=1067\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 9. 9kW. 318-530 cu ft. Slim stainless tower. 330 lbs of stone. No Extension Box required.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL 9 is the mid-range floor-standing model in the HUUM STEEL series - a slim brushed stainless steel tower carrying 330 lbs of 2\"-4\" rounded olivine stones for rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit, with no UKU Extension Box required. This listing is the heater only. UKU control and 330 lbs of stones are required and sold separately. See the STEEL 9STU Package for a bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-530 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlim stainless tower\u003c\/strong\u003e - 4\" clearance, 330 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eInternal air duct, adjustable legs, bench-embedding possible\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU control + stones sold separately\u003c\/strong\u003e - STEEL 9STU Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eSTEEL 9 standalone vs STEEL 9STU Package\u003c\/span\u003e\n\u003ch4\u003eStandalone heater vs STEEL 9STU Package - which to order\u003c\/h4\u003e\n\u003cp\u003eThis listing is the STEEL 9 heater only - adjustable legs and IOM included. For operation, a UKU control unit (Local Black or WiFi) and 330 lbs of 2\"-4\" rounded olivine stones (10 boxes) are required and sold separately. The STEEL 9STU Package bundles all three in a single purchase. The standalone heater is appropriate for buyers replacing just the heater in an existing STEEL installation, or sourcing components individually. For most new installations, the STEEL 9STU Package is the more convenient option. Stone size confirmation: use only 2\"-4\" (5-10 cm) rounded olivine in the STEEL 9 basket. Do not use CLIFF-specification 1\"-2\" stones. A licensed electrician is required for the 50A \/ 8 AWG connection. Do not connect to a GFI\/GFCI breaker. STEEL safety railing recommended. Embedding flange and reflector panels sold separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM STEEL 9kW mid-range floor-standing stainless tower versus STEEL 6 and STEEL 10.5 comparison same body dimensions\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-steel-sauna-heater-top-500x500_0.jpg?v=1779691511\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL 9 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stone type or size, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52280718721306,"sku":"H1006022","price":2224.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-steel-series-electric-sauna-heater-9kw-sauna-heater-supply-438124.jpg?v=1779522914"},{"product_id":"huum-drop-4-drop-series-4-5kw-sauna-heater","title":"HUUM DROP 4 DROP Series 4.5kW Sauna Heater","description":"\u003cp\u003e\u003c!-- HUUM DROP 4.5 - 4.5kW Wall-Mounted Sauna Heater, Water-Droplet Form - Standalone --\u003e\u003c!-- SKU: H1001052 | DROP Series | 106-177 cu ft | Wall-mounted | Heater only --\u003e\u003c!-- UKU control sold separately | Stones: 122 lbs sold separately | No UKU Extension Box required --\u003e\u003c!-- Single 30A \/ 10 AWG | SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 8 document sections: IOM | DROP Installation Video | Warranty | Stone Placement Video | --\u003e\u003c!--   Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=49K38GQ--E9a-Tfg\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/-6fJDlij0v0?si=E-4VziXdDfGw_Eff\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM DROP 4 DROP Series 4.5kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM DROP 4 is a 4.5kW wall-mounted electric sauna heater for small sauna rooms from 106 to 177 cubic feet, with the iconic water-droplet form. This listing is the heater only. A UKU control unit and sauna stones are required for operation and sold separately. The DROP 4 is the entry model in the HUUM DROP wall-mounted series - the smallest output in the DROP range for rooms from 106 to 177 cubic feet on a single 30A \/ 10 AWG circuit. No UKU Extension Box is required. The DROP 4 delivers the distinctive DROP water-droplet profile and 122-lb stone capacity of the full DROP series in the output appropriate for personal home saunas, apartment saunas, and compact two-person rooms. For a complete installation including control and stones in a single purchase, see the HUUM DROP 4.5STU Package listing at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eThe DROP design - water-droplet form, wall-mounted, 122 lbs of stone\u003c\/h4\u003e\n\u003cp\u003eThe HUUM DROP is one of the most recognised sauna heater silhouettes in contemporary sauna design - a smooth, rounded water-droplet form that mounts on the sauna wall with the pointed end facing downward. Unlike conventional rectangular wall-mounted heaters, the DROP's curved profile reads as a sculptural object in the sauna room rather than an appliance. At 4.5kW for rooms from 106 to 177 cubic feet, the DROP 4 carries 122 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones - a generous stone capacity for a small-room wall-mounted heater, providing good thermal mass for sustained steam quality in the compact room it serves. The stone placement video in the documents section below covers the correct method for loading 122 lbs of stones into the DROP basket, which is important for element life and steam performance.\u003c\/p\u003e\n\u003ch4\u003e4.5kW - the entry DROP for rooms 106-177 cu ft\u003c\/h4\u003e\n\u003cp\u003eThe DROP series runs from 4.5kW to 9kW: DROP 4 (106-177 cu ft, 30A \/ 10 AWG), DROP 6 (177-318 cu ft, 30A \/ 10 AWG), DROP 7.5 (248-389 cu ft, 40A \/ 8 AWG), and DROP 9 (318-530 cu ft, 50A \/ 8 AWG). The DROP 4 is the correctly sized DROP for rooms at the small end of the HUUM range - personal home saunas, pre-built sauna cabins for one or two people, apartment saunas, and smaller-footprint dedicated sauna rooms. For rooms below 106 cu ft or above 177 cu ft, a different DROP or a different HUUM heater series is appropriate. The Size Your Sauna document below and the HUUM heater calculator at BathingBrands confirm the correct model for a specific room size.\u003c\/p\u003e\n\u003ch4\u003eStone placement matters - follow the Stone Placement Video\u003c\/h4\u003e\n\u003cp\u003eCorrect stone placement in the DROP basket is important for heating element longevity and steam quality. The DROP's curved basket geometry requires stones to be loaded in a specific pattern that ensures adequate airflow around the elements and even thermal contact across the stone mass. The Stone Placement Video in the documents section below walks through the correct loading procedure step by step. Incorrect stone placement - packing stones too tightly around the elements or loading stones of the wrong size - is one of the most common causes of early element failure in DROP heaters. Use only 2\"-4\" (5-10 cm) rounded olivine stones as specified in the Stone Requirements document.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e4.5kW wall-mounted sauna heater for rooms from 106 to 177 cubic feet. Iconic water-droplet form. Entry model in the DROP series. 122 lbs stone capacity - 2\"-4\" rounded olivine. No UKU Extension Box required. UKU control (Local Black or WiFi) sold separately. Stones sold separately. Single 30A breaker, 10 AWG wire. 240V \/ 1-phase. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See DROP 4.5STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e4.5 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e106 to 177 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWater-droplet wall-mounted form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eEntry model in the DROP series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine stones (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 30A breaker - 10 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e4.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e18.75 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 30A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e106 to 177 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eWater-droplet - wall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eRounded, pointed base - mount point up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDROP series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 4 (this listing)\u003c\/td\u003e\n\u003ctd\u003e4.5kW | 106-177 cu ft | 30A \/ 10 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6\u003c\/td\u003e\n\u003ctd\u003e6kW | 177-318 cu ft | 30A \/ 10 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 7.5\u003c\/td\u003e\n\u003ctd\u003e7.5kW | 248-389 cu ft | 40A \/ 8 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 9\u003c\/td\u003e\n\u003ctd\u003e9kW | 318-530 cu ft | 50A \/ 8 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 4.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1001052\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM DROP 4.5kW wall-mounted sauna heater - water-droplet form\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eMounting hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); sauna stones (122 lbs, 2\"-4\" rounded olivine - see Stone Requirements). \u003cstrong\u003eSee also:\u003c\/strong\u003e DROP 4.5STU Package for a bundled purchase. Watch the Stone Placement Video before loading stones. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 4 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIconic water-droplet form - smallest DROP\u003c\/div\u003e\n\u003cp\u003eThe DROP 4 delivers the full DROP water-droplet aesthetic - one of the most recognisable contemporary sauna heater silhouettes - in the output appropriate for rooms from 106 to 177 cubic feet. For small personal home saunas, apartment saunas, and compact two-person rooms where the DROP's sculptural wall-mounted presence is the design goal, the DROP 4 is the entry point to the series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e30A \/ 10 AWG - no Extension Box\u003c\/div\u003e\n\u003cp\u003eThe DROP 4 runs on a single 30A \/ 10 AWG circuit without a UKU Extension Box - the lightest floor-standing-equivalent DROP circuit (shared with the DROP 6). For small sauna rooms in homes or apartments where panel capacity is a consideration, the 30A \/ 10 AWG specification of the DROP 4 is among the most accessible electrical requirements of any HUUM heater with this stone capacity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e122 lbs of stone - generous for 4.5kW wall-mounted\u003c\/div\u003e\n\u003cp\u003eThe DROP 4 carries 122 lbs of 2\"-4\" rounded olivine stones - the same capacity as the DROP 6. At 4.5kW driving 122 lbs of stone mass, the thermal reserve is proportionally high relative to the output: more stone mass at lower output means softer, longer-lasting steam and better temperature stability in the 106-177 cu ft room the DROP 4 serves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eStone placement video - critical for element life\u003c\/div\u003e\n\u003cp\u003eThe Stone Placement Video in the documents below walks through the correct method for loading 122 lbs of stones into the DROP basket. Correct stone placement ensures adequate airflow around the heating elements and even thermal distribution through the stone mass. HUUM recommends watching this video before loading stones for any DROP heater installation - incorrect placement is a leading cause of premature element failure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a small sauna\u003c\/div\u003e\n\u003cp\u003eA 106-177 cu ft sauna room at 4.5kW reaches bathing temperature in 15-25 minutes. The UKU WiFi (sold separately) adds HUUM app remote preheat on iOS and Android - start the sauna before leaving work or from the other room and arrive to a ready temperature. No Extension Box required for the 4.5kW DROP. The UKU Local Black provides on-site digital control without app connectivity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDROP 4.5STU Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe DROP 4.5STU Package at BathingBrands bundles the DROP 4 heater, UKU control (Local Black or WiFi at checkout), and stones in a single purchase. This standalone listing is for buyers replacing just the heater in an existing DROP installation, or purchasing components in separate transactions. For most new installations, the Package is the more convenient path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"HUUM DROP 4.5kW wall-mounted sauna heater water-droplet form stainless steel 122 lbs stone capacity\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-11\/DropPKG1.jpg\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 4 4.5kW. 106-177 cu ft. Water-droplet form. 122 lbs of stone. 30A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The DROP 4 is the entry model in the HUUM DROP wall-mounted series - the iconic water-droplet form in the 4.5kW output for rooms from 106 to 177 cubic feet on a single 30A \/ 10 AWG circuit. This listing is the heater only. UKU control and stones are required and sold separately. See the DROP 4.5STU Package for a bundled purchase. Watch the Stone Placement Video before loading stones. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.5kW, 106-177 cu ft\u003c\/strong\u003e - single 30A \/ 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater-droplet wall-mounted form\u003c\/strong\u003e - iconic DROP design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e122 lbs stone capacity\u003c\/strong\u003e - 2\"-4\" rounded olivine\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU control + stones sold separately\u003c\/strong\u003e - DROP 4.5STU Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eDROP standalone vs DROP 4.5STU Package\u003c\/span\u003e\n\u003ch4\u003eStandalone heater vs DROP 4.5STU Package - which to order\u003c\/h4\u003e\n\u003cp\u003eThis listing is the DROP 4 heater only. For operation, a UKU control unit and stones are required and sold separately. The DROP 4.5STU Package bundles all three in a single purchase with the UKU IOM, UKU Diagram, and UKU Video included alongside the DROP documents. This standalone listing documents only the DROP heater itself - the installation and stone placement documents below are for the heater. For most new DROP installations, the Package is the more convenient and complete option. Stone specification: 2\"-4\" (5-10 cm) rounded olivine only. Watch the Stone Placement Video before loading. Do not connect to a GFI\/GFCI breaker. A licensed electrician is required for the 30A \/ 10 AWG circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM DROP 4.5kW water-droplet wall-mounted heater versus DROP 4.5STU Package comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/drop-sauna-heater-side-500x500.jpg?v=1779701605\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 4 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, incorrect stone placement, use of incorrect stone size (non 2\"-4\" stones), operating without the required stone load, or failure to follow HUUM's installation and stone placement guidelines. Watch the Stone Placement Video before loading stones. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52281508790554,"sku":"H1001052","price":1334.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/drop-3-4.jpg?v=1779701461"},{"product_id":"huum-drop-6-drop-series-6-0kw-sauna-heater","title":"HUUM DROP 6 DROP Series 6.0kW Sauna Heater","description":"\u003cp\u003e\u003c!-- HUUM DROP 6 - 6.0kW Wall-Mounted Sauna Heater, Water-Droplet Form - Standalone --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=RffzNumVoLGjIhL6\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/-6fJDlij0v0?si=rmcdpD4Rv3k-tFel\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\n\u003c\/h2\u003e\n\u003ch2\u003eHUUM DROP 6 DROP Series 6.0kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- SKU: H1001062 | DROP Series | 177-318 cu ft | Wall-mounted | Heater only --\u003e\u003c!-- UKU control sold separately | Stones: 122 lbs sold separately | No UKU Extension Box required --\u003e\u003c!-- Single 30A \/ 10 AWG | SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 8 document sections: IOM | DROP Installation Video | Warranty | Stone Placement Video | --\u003e\u003c!--   Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM DROP 6 is a 6kW wall-mounted electric sauna heater for sauna rooms from 177 to 318 cubic feet, with the iconic water-droplet form. This listing is the heater only. A UKU control unit and sauna stones are required for operation and sold separately. The DROP 6 is the mid-range entry model in the HUUM DROP series - a step up from the DROP 4.5 (106-177 cu ft) in output for rooms from 177 to 318 cubic feet on the same 30A \/ 10 AWG circuit. No UKU Extension Box is required. For a complete installation including control and stones in a single purchase, see the HUUM DROP 6STU Package listing at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eThe DROP design - water-droplet form, 122 lbs of stone at 6kW\u003c\/h4\u003e\n\u003cp\u003eThe HUUM DROP is one of the most distinctive sauna heater silhouettes in contemporary design - a smooth, rounded water-droplet shape that mounts on the sauna wall with the pointed end facing downward. The DROP 6 delivers this aesthetic at 6kW for rooms from 177 to 318 cubic feet, with the same 122-lb stone capacity as the DROP 4.5. At 6kW driving 122 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones, the DROP 6 produces consistent, soft steam throughout sessions in the room range it covers. The stone placement video in the documents section below covers the correct loading method for the DROP basket - following the correct stone placement procedure is important for element life and steam quality performance across all DROP models.\u003c\/p\u003e\n\u003ch4\u003e6kW on a 30A \/ 10 AWG circuit - same as DROP 4.5, larger room range\u003c\/h4\u003e\n\u003cp\u003eThe DROP 4.5 and DROP 6 share the same 30A \/ 10 AWG electrical specification - a single-circuit installation with no UKU Extension Box. The difference between them is output and room coverage: DROP 4.5 covers 106-177 cu ft; DROP 6 covers 177-318 cu ft. For rooms between 177 and 318 cubic feet, the DROP 6 is the correctly matched DROP model on a standard 30A circuit. Rooms approaching 318 cu ft with cold surfaces - tile, glass, or masonry - should have their adjusted cubic footage calculated to confirm whether the DROP 6 or the DROP 7.5 (40A \/ 8 AWG) is the appropriate choice. The next step up in the DROP series - the DROP 7.5 (248-389 cu ft, 40A \/ 8 AWG) - requires a heavier circuit; for the 30A range the DROP 6 is the larger DROP available.\u003c\/p\u003e\n\u003ch4\u003eStone placement matters - watch the Stone Placement Video\u003c\/h4\u003e\n\u003cp\u003eCorrect stone placement in the DROP basket is important for element longevity and steam quality. The DROP's rounded basket geometry requires stones to be loaded in a specific pattern that ensures adequate airflow around the heating elements and even thermal contact. The Stone Placement Video in the documents section below provides step-by-step guidance. Use only 2\"-4\" (5-10 cm) rounded olivine stones as specified in the Stone Requirements document - these are the same stones used across all DROP, HIVE, and STEEL series heaters. Do not use CLIFF-specification 1\"-2\" stones in any DROP model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e6kW wall-mounted sauna heater for rooms from 177 to 318 cubic feet. Iconic water-droplet form. Same 30A \/ 10 AWG circuit as DROP 4.5 - larger room range. 122 lbs stone capacity - 2\"-4\" rounded olivine. No UKU Extension Box required. UKU control (Local Black or WiFi) sold separately. Stones sold separately. Single 30A breaker, 10 AWG wire. 240V \/ 1-phase. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See DROP 6STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e177 to 318 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWater-droplet wall-mounted form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSame 30A \/ 10 AWG as DROP 4.5 - larger range\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine stones (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 30A breaker - 10 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e25 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 30A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e177 to 318 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eWater-droplet - wall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eRounded, pointed base - mount point up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDROP series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 4.5\u003c\/td\u003e\n\u003ctd\u003e4.5kW | 106-177 cu ft | 30A \/ 10 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6 (this listing)\u003c\/td\u003e\n\u003ctd\u003e6kW | 177-318 cu ft | 30A \/ 10 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 7.5\u003c\/td\u003e\n\u003ctd\u003e7.5kW | 248-389 cu ft | 40A \/ 8 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 9\u003c\/td\u003e\n\u003ctd\u003e9kW | 318-530 cu ft | 50A \/ 8 AWG | 122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 6kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1001062\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM DROP 6kW wall-mounted sauna heater - water-droplet form\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eMounting hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); sauna stones (122 lbs, 2\"-4\" rounded olivine - see Stone Requirements). \u003cstrong\u003eSee also:\u003c\/strong\u003e DROP 6STU Package for a bundled purchase. Watch the Stone Placement Video before loading stones. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 6 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e6kW DROP on a 30A circuit - widest residential range\u003c\/div\u003e\n\u003cp\u003eThe DROP 6 covers rooms from 177 to 318 cubic feet on the same 30A \/ 10 AWG circuit as the DROP 4.5 - making it the highest-output DROP available on the lightest DROP circuit. For standard-framed home sauna rooms in this range where 30A is the available circuit capacity, the DROP 6 is the correct choice: more output than the DROP 4.5 without stepping up to the heavier 40A requirement of the DROP 7.5.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIconic water-droplet form for mid-size rooms\u003c\/div\u003e\n\u003cp\u003eThe DROP 6 delivers the full DROP water-droplet aesthetic - smooth rounded curves, pointed base, stainless steel finish - for rooms from 177 to 318 cubic feet. Where the DROP 4.5 serves the smallest personal sauna rooms, the DROP 6 serves two-person home saunas, larger cabin saunas, and purpose-built residential sauna rooms in the most common residential size range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e122 lbs of stone - same as DROP 4.5\u003c\/div\u003e\n\u003cp\u003eThe DROP 6 carries the same 122-lb stone capacity as the DROP 4.5. At 6kW driving 122 lbs of stone mass, the thermal reserve-to-output ratio is well matched for the 177-318 cu ft range: the stone mass holds heat effectively through normal home sauna session lengths and produces consistent, soft steam when water is ladled throughout the session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eStone Placement Video - critical for element life\u003c\/div\u003e\n\u003cp\u003eThe Stone Placement Video in the documents below provides step-by-step guidance for loading 122 lbs of stones into the DROP basket correctly. Correct placement ensures adequate airflow around the elements and even stone-to-element thermal contact. HUUM includes this video specifically because incorrect stone loading is the leading cause of preventable element failure in DROP heaters - watching before loading is strongly recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eNo Extension Box - straightforward installation\u003c\/div\u003e\n\u003cp\u003eAt 6kW, the DROP 6 connects directly to the UKU control without a UKU Extension Box. The installation is: heater wired to the 30A circuit, UKU control mounted on the wall, data cable connecting control to heater. No additional Extension Box hardware to source, mount, or wire. The simplest DROP installation path within the most common home sauna room size range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDROP 6STU Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe DROP 6STU Package at BathingBrands bundles the DROP 6 heater, UKU control (Local Black or WiFi at checkout), and stones in a single purchase and includes the UKU IOM, Diagram, and Video alongside the DROP documents. This standalone listing is for buyers replacing just the heater in an existing DROP installation or purchasing components separately. For most new DROP installations, the Package is the more convenient path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM DROP 6kW wall-mounted sauna heater water-droplet form stainless steel 122 lbs stone capacity 177-318 cu ft\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/drop-3-4.jpg?v=1779701461\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 6. 6kW. 177-318 cu ft. Water-droplet form. 122 lbs of stone. 30A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The DROP 6 is the 6kW mid-range model in the HUUM DROP wall-mounted series - the iconic water-droplet form for rooms from 177 to 318 cubic feet on a single 30A \/ 10 AWG circuit with no UKU Extension Box required. This listing is the heater only. UKU control and stones are required and sold separately. See the DROP 6STU Package for a bundled purchase. Watch the Stone Placement Video before loading stones. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW, 177-318 cu ft\u003c\/strong\u003e - single 30A \/ 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater-droplet wall-mounted form\u003c\/strong\u003e - iconic DROP design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e122 lbs stone capacity\u003c\/strong\u003e - 2\"-4\" rounded olivine\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU control + stones sold separately\u003c\/strong\u003e - DROP 6STU Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2\"\u003e\u003c\/path\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 6 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, incorrect stone placement, use of incorrect stone size, operating without the required stone load, or failure to follow HUUM's installation and stone placement guidelines. Watch the Stone Placement Video before loading stones. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52281533006106,"sku":"H1001062","price":1506.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/drop-3-4.jpg?v=1779701461"},{"product_id":"huum-drop-9-drop-series-9kw-sauna-heater","title":"HUUM DROP 9 DROP Series 9kW Sauna Heater","description":"\u003cp\u003e\u003c!-- HUUM DROP 9 - 9kW Wall-Mounted Sauna Heater, Water-Droplet Form - Standalone --\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\n\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/XOvYxiIffyA?si=eDRPnJb5X_yNWkGO\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/-6fJDlij0v0?si=-KG9H1SkFO1RUrKS\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\n\u003c\/h2\u003e\n\u003ch2\u003eHUUM DROP 9 DROP Series 9kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- SKU: H1001072 | DROP Series | 318-530 cu ft | Wall-mounted | Heater only --\u003e\u003c!-- UKU control sold separately | Stones: 122 lbs sold separately | No UKU Extension Box required --\u003e\u003c!-- Single 50A \/ 8 AWG | SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- Top of the DROP series | Heaviest DROP circuit: 50A \/ 8 AWG --\u003e\u003c!-- 8 document sections: IOM | DROP Installation Video | Warranty | Stone Placement Video | --\u003e\u003c!--   Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM DROP 9 is a 9kW wall-mounted electric sauna heater for sauna rooms from 318 to 530 cubic feet, with the iconic water-droplet form. This listing is the heater only. A UKU control unit and sauna stones are required for operation and sold separately. The DROP 9 is the top model in the HUUM DROP wall-mounted series - the highest output and largest room coverage in the DROP range, for rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit. No UKU Extension Box is required. For a complete installation including control and stones in a single purchase, see the HUUM DROP 9STU Package listing at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eTop of the DROP series - 9kW for rooms up to 530 cu ft\u003c\/h4\u003e\n\u003cp\u003eThe HUUM DROP series covers four output levels: 4.5kW (106-177 cu ft, 30A), 6kW (177-318 cu ft, 30A), 7.5kW (248-389 cu ft, 40A), and 9kW (318-530 cu ft, 50A). The DROP 9 is the highest output in the series and covers the widest room range - 318 to 530 cubic feet. For dedicated home sauna rooms at the larger end of standard residential sauna sizes, two-bench sauna cabins, and smaller commercial installations where the DROP's wall-mounted water-droplet form is the design choice, the DROP 9 provides the output to heat the room effectively and maintain temperature through extended sessions. The same 122-lb stone capacity and 2\"-4\" (5-10 cm) rounded olivine stone specification applies across all four DROP output levels - the heater body scales in output without changing the stone specification or the iconic water-droplet profile.\u003c\/p\u003e\n\u003ch4\u003e50A \/ 8 AWG - the heaviest DROP circuit, no Extension Box\u003c\/h4\u003e\n\u003cp\u003eThe DROP 9 requires a single 50A \/ 8 AWG circuit - heavier than the DROP 7.5 (40A \/ 8 AWG) and the DROP 4.5 and 6 (both 30A \/ 10 AWG). Despite requiring the 50A specification, no UKU Extension Box is required for the DROP 9: the Extension Box threshold is above 12kW, and at 9kW the DROP 9 connects directly to the UKU control. Confirm the electrical panel has an available 50A slot before ordering. A licensed electrician is required for the 50A \/ 8 AWG circuit connection. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003ch4\u003eStone placement matters - 122 lbs correctly placed extends element life\u003c\/h4\u003e\n\u003cp\u003eCorrect stone placement in the DROP basket is important for heating element longevity and steam quality across all DROP models. The DROP 9's 122-lb stone load at 9kW generates substantial heat cycling through the elements on every session; correct airflow around the elements through proper stone placement directly affects element service life. The Stone Placement Video in the documents section below provides step-by-step guidance for the correct DROP loading method. Use only 2\"-4\" (5-10 cm) rounded olivine diabase stones as specified in the Stone Requirements document. Stones are not included in this listing and must be purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e9kW wall-mounted sauna heater for rooms from 318 to 530 cubic feet. Iconic water-droplet form. Top of the DROP series - largest output and room range. 122 lbs stone capacity - 2\"-4\" rounded olivine. No UKU Extension Box required. UKU control (Local Black or WiFi) sold separately. Stones sold separately. Single 50A breaker, 8 AWG wire. 240V \/ 1-phase. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See DROP 9STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 530 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eWater-droplet wall-mounted form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eTop of the DROP series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e122 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine stones (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 530 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e122 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eWater-droplet - wall-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eRounded, pointed base - mount point up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eFull DROP series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 4.5\u003c\/td\u003e\n\u003ctd\u003e4.5kW | 106-177 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 6\u003c\/td\u003e\n\u003ctd\u003e6kW | 177-318 cu ft | 30A \/ 10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 7.5\u003c\/td\u003e\n\u003ctd\u003e7.5kW | 248-389 cu ft | 40A \/ 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDROP 9 (this listing)\u003c\/td\u003e\n\u003ctd\u003e9kW | 318-530 cu ft | 50A \/ 8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll DROP models\u003c\/td\u003e\n\u003ctd\u003e122 lbs stones | 2\"-4\" rounded olivine | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1001072\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM DROP 9kW wall-mounted sauna heater - water-droplet form\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eMounting hardware\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); sauna stones (122 lbs, 2\"-4\" rounded olivine - see Stone Requirements). \u003cstrong\u003eSee also:\u003c\/strong\u003e DROP 9STU Package for a bundled purchase. Watch the Stone Placement Video before loading stones. A licensed electrician is required for the 50A \/ 8 AWG connection. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM DROP 9 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eTop of the DROP series - 318-530 cu ft\u003c\/div\u003e\n\u003cp\u003eThe DROP 9 is the highest-output model in the DROP wall-mounted series and covers the largest room range - 318 to 530 cubic feet. For the full range of standard residential sauna rooms and smaller commercial installations where the DROP's water-droplet wall-mounted form is the design choice, the DROP 9 is the top output available in this heater family. No other DROP model covers rooms above 389 cu ft.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e9kW on a single 50A circuit - no Extension Box\u003c\/div\u003e\n\u003cp\u003eAt 9kW, the DROP 9 operates on a single 50A \/ 8 AWG circuit without a UKU Extension Box - the extension box threshold is above 12kW. The installation is straightforward: heater connected to the 50A circuit, UKU control mounted on the wall, data cable connecting control to heater. Confirm a 50A panel slot is available before ordering and plan the 8 AWG wire run with a licensed electrician.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eWater-droplet form at the largest DROP scale\u003c\/div\u003e\n\u003cp\u003eThe DROP 9 carries the same iconic water-droplet silhouette as the 4.5, 6, and 7.5kW models - the smooth curves and pointed base that mount on the sauna wall as a sculptural element. At 9kW in a 318-530 cu ft room, the DROP 9 brings this aesthetic to mid-size dedicated home sauna rooms and two-bench cabin saunas where a wall-mounted heater is the appropriate choice for bench clearance and room layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eStone Placement Video - element life depends on it\u003c\/div\u003e\n\u003cp\u003eAt 9kW, the DROP 9's elements cycle through greater heat output per session than the smaller DROP models. Correct stone placement - ensuring adequate airflow around the elements through properly loaded 2\"-4\" stones - is proportionally more important at higher output. The Stone Placement Video in the documents below provides the correct method for the DROP basket. HUUM strongly recommends watching before loading for any DROP heater, especially the higher-output models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e50A vs 40A - the DROP 9 vs DROP 7.5 decision\u003c\/div\u003e\n\u003cp\u003eThe DROP 7.5 (248-389 cu ft, 40A \/ 8 AWG) and DROP 9 (318-530 cu ft, 50A \/ 8 AWG) overlap from 318-389 cu ft. Both use 8 AWG wire; the difference is the breaker amperage. For rooms from 318-389 cu ft with standard insulation, the DROP 7.5 is adequate on a 40A breaker. For rooms above 389 cu ft or rooms with cold surfaces in the overlap zone, the DROP 9 on a 50A breaker is the correct choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDROP 9STU Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe DROP 9STU Package at BathingBrands bundles the DROP 9 heater, UKU control (Local Black or WiFi at checkout), and stones in a single purchase including all UKU and DROP documents. This standalone listing is for buyers replacing just the heater in an existing DROP installation or purchasing components separately. For most new DROP 9 installations, the Package is the more convenient option.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg alt=\"HUUM DROP 9kW wall-mounted sauna heater water-droplet form stainless steel 122 lbs stone capacity 318-530 cu ft top of DROP series\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-11\/DropPKG1.jpg\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM DROP 9. 9kW. 318-530 cu ft. Water-droplet form. 122 lbs of stone. Top of the DROP series.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The DROP 9 is the top-output model in the HUUM DROP wall-mounted series - the iconic water-droplet form at 9kW for rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit with no UKU Extension Box required. This listing is the heater only. UKU control and stones are required and sold separately. See the DROP 9STU Package for a bundled purchase. Watch the Stone Placement Video before loading stones. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-530 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWater-droplet wall-mounted form\u003c\/strong\u003e - top of the DROP series\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e122 lbs stone capacity\u003c\/strong\u003e - 2\"-4\" rounded olivine\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU control + stones sold separately\u003c\/strong\u003e - DROP 9STU Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-DROP-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM DROP 9 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, incorrect stone placement, use of incorrect stone size, operating without the required stone load, or failure to follow HUUM's installation and stone placement guidelines. Watch the Stone Placement Video before loading stones. A licensed electrician is required for the 50A \/ 8 AWG circuit. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52281675874586,"sku":"H1001072","price":1751.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/drop-3-4.jpg?v=1779701461"},{"product_id":"huum-hive-12-hive-series-12-0kw-sauna-heater","title":"HUUM HIVE 12 HIVE Series 12.0kW Sauna Heater","description":"\u003c!-- HUUM HIVE 12 - 12kW Floor-Standing Sauna Heater, Beehive Cage Form - Standalone --\u003e\u003c!-- SKU: H1003012 | HIVE Series | 424-636 cu ft | Floor-standing beehive cage | Heater only --\u003e\u003c!-- UKU control + UKU Extension Box + 528 lbs stones all sold separately --\u003e\u003c!-- Dual 30A circuits \/ 10 AWG | SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 6 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM HIVE 12 HIVE Series 12.0kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE 12 is a 12kW floor-standing electric sauna heater for rooms from 424 to 636 cubic feet, with the distinctive open beehive cage form. This listing is the heater only. A UKU control unit, UKU Extension Box, and sauna stones are all required for operation and sold separately. The HIVE 12 is the lower-output model in the HUUM HIVE floor-standing series - the entry point to the full-size HIVE beehive for rooms from 424 to 636 cubic feet on a dual 30A \/ 10 AWG circuit configuration. The UKU Extension Box is required at 12kW and must be purchased alongside the control and stones when ordering this standalone heater. For a complete installation in a single purchase, see the HUUM HIVE 12STU Package at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eThe HIVE design - open beehive cage, 528 lbs of stone\u003c\/h4\u003e\n\u003cp\u003eThe HUUM HIVE is a floor-standing electric sauna heater with an open hexagonal cage structure - the beehive form that gives the series its name. The cage is 18.11\" (460 mm) in diameter and contains a central heating element column surrounded by 528 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones. The open cage structure allows the full stone mass to be visible from all angles and lets heat and steam radiate from the stone surface throughout the full circumference of the heater. The HIVE's large stone capacity - 528 lbs at 12kW - provides substantial thermal mass that sustains heat and produces soft, long-lasting steam through extended sessions and back-to-back use. The visual presence of the HIVE in the sauna room is significant: at 18.11\" diameter, it is designed to be a focal element of the space rather than a background appliance.\u003c\/p\u003e\n\u003ch4\u003eDual 30A circuit - unique HIVE 12 electrical configuration\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 12 uses a dual-circuit electrical configuration - two separate 30A \/ 10 AWG circuits rather than a single heavier circuit. This is different from the HIVE 15 (which uses dual 50A \/ 8 AWG circuits) and different from the DROP, CLIFF, and STEEL series which all use single circuits. The dual 30A \/ 10 AWG specification means two separate 30A breakers and two separate 10 AWG wire runs are required for the HIVE 12 installation. The UKU Extension Box manages the connection between the two circuits and the UKU control panel and is a required component for the dual-circuit HIVE 12 configuration. Confirm the electrical panel has two available 30A slots before ordering. A licensed electrician is required.\u003c\/p\u003e\n\u003ch4\u003e528 lbs of stones - sold separately, three required components\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 12 requires three separate component purchases for a complete installation: a UKU control unit (Local Black or WiFi), a UKU Extension Box (required at 12kW), and 528 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones. All three are sold separately at BathingBrands. The HIVE 12STU Package bundles all four components (heater, control, Extension Box, and stones) in a single purchase. For buyers ordering the standalone heater, confirm all three required components are included in the order before checkout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e12kW floor-standing sauna heater for rooms from 424 to 636 cubic feet. Open 18.11\" beehive cage form. 528 lbs stone capacity - 2\"-4\" rounded olivine. Dual 30A \/ 10 AWG circuits - two separate breakers required. UKU Extension Box required - not included in this listing. Required (all sold separately): UKU control (Local Black or WiFi); UKU Extension Box; 528 lbs stones. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See HIVE 12STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e12 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e424 to 636 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOpen 18.11\" beehive cage form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e528 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine stones (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDual 30A breakers \/ 10 AWG - two circuits\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box required (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e12 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit configuration\u003c\/td\u003e\n\u003ctd\u003eDual circuits - two separate 30A breakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge per circuit\u003c\/td\u003e\n\u003ctd\u003e10 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e424 to 636 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e528 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eOpen hexagonal beehive cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel cage and elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRequired components (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired at 12kW - sold separately at BathingBrands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones\u003c\/td\u003e\n\u003ctd\u003e528 lbs (2\"-4\" rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE floor-standing series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 12kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e424-636 cu ft | Dual 30A \/ 10 AWG | 528 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 15kW\u003c\/td\u003e\n\u003ctd\u003e530-813 cu ft | Dual 50A \/ 8 AWG | 528 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.6kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 330 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1003012\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE 12kW floor-standing sauna heater - 18.11\" open beehive cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (all sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); UKU Extension Box (required at 12kW); 528 lbs sauna stones (2\"-4\" rounded olivine). \u003cstrong\u003eSee also:\u003c\/strong\u003e HIVE 12STU Package for all components bundled. A licensed electrician is required. Two 30A breakers and two 10 AWG wire runs needed. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE 12 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eOpen beehive cage - 528 lbs of visible stone\u003c\/div\u003e\n\u003cp\u003eThe HIVE's 18.11\" open hexagonal cage presents 528 lbs of stones visible on all sides through the cage structure. In the sauna room, the HIVE reads as a stone column surrounded by a structural cage - a heater that is as much a design element as a heating appliance. The open structure allows heat and steam to radiate from the full circumference of the stone mass on every session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e12kW for rooms 424-636 cu ft\u003c\/div\u003e\n\u003cp\u003eThe HIVE 12 covers mid-large sauna rooms from 424 to 636 cubic feet - the entry point to the full-size HIVE series. For dedicated home saunas in this range, two-bench cabin saunas, and smaller commercial installations where the HIVE's large stone mass and distinctive beehive form are the design priority, the HIVE 12 provides the correct output on a dual 30A circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDual 30A circuits - plan before ordering\u003c\/div\u003e\n\u003cp\u003eThe HIVE 12's dual 30A \/ 10 AWG configuration requires two separate breaker slots and two separate wire runs from the panel to the heater location. This is different from every other HUUM heater's single-circuit configuration. Confirm the panel has two available 30A slots and plan both wire runs before ordering. The HIVE 15 uses dual 50A \/ 8 AWG - heavier still.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e528 lbs of stone - maximum thermal mass\u003c\/div\u003e\n\u003cp\u003eAt 528 lbs, the HIVE carries more stone mass than any other HUUM heater model. The large stone load provides sustained heat retention, slow and soft steam release, and excellent temperature recovery between back-to-back sessions. For large sauna rooms with multiple bathers or facilities with continuous high-frequency use, the 528-lb stone mass is the key thermal advantage of the HIVE series.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eExtension Box required - confirm before ordering\u003c\/div\u003e\n\u003cp\u003eThe UKU Extension Box is required for the HIVE 12 and is not included in this standalone listing. It is included in the HIVE 12STU Package. When ordering the standalone heater, add the Extension Box to the order alongside the UKU control and stones. The Extension Box manages the connection between the HIVE's dual-circuit load and the UKU control panel and is not optional.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eHIVE 12STU Package - the complete purchase path\u003c\/div\u003e\n\u003cp\u003eThe HIVE 12STU Package at BathingBrands bundles the HIVE 12 heater, UKU control (Local Black or WiFi at checkout), UKU Extension Box, and 528 lbs of stones in a single purchase. For most new HIVE 12 installations, the Package is the more convenient option - all required components in one order. This standalone listing is for buyers replacing just the heater or sourcing components individually.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE 12kW floor-standing sauna heater 18.11 inch open beehive cage 528 lbs stone capacity dual 30A circuits\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-sauna-heater_d0a54b4a-9d05-4c1a-a36b-854a59c3fc60.jpg?v=1779706224\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE 12. 12kW. 424-636 cu ft. 18.11\" beehive cage. 528 lbs of stone. Dual 30A circuits.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE 12 is the 12kW model in the HUUM HIVE floor-standing series - an 18.11\" open beehive cage carrying 528 lbs of 2\"-4\" rounded olivine stones for rooms from 424 to 636 cubic feet on dual 30A \/ 10 AWG circuits. This listing is the heater only. UKU control, UKU Extension Box, and 528 lbs of stones are all required and sold separately. See the HIVE 12STU Package for a bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e12kW, 424-636 cu ft\u003c\/strong\u003e - dual 30A \/ 10 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18.11\" open beehive cage\u003c\/strong\u003e - 528 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Extension Box required\u003c\/strong\u003e - sold separately (included in PKG)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUKU control + 528 lbs stones also sold separately\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHIVE 12STU Package available\u003c\/strong\u003e - all components bundled\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE 12 vs HIVE 15 - choosing between them\u003c\/span\u003e\n\u003ch4\u003eHIVE 12 (dual 30A) vs HIVE 15 (dual 50A) - room size and circuit capacity\u003c\/h4\u003e\n\u003cp\u003eBoth the HIVE 12 and HIVE 15 are full-size HUUM HIVE floor-standing heaters with the same 18.11\" beehive cage form and 528-lb stone capacity. HIVE 12: 12kW, 424-636 cu ft, dual 30A \/ 10 AWG - two 30A slots required. HIVE 15: 15kW, 530-813 cu ft, dual 50A \/ 8 AWG - two 50A slots and heavier wire required. For rooms from 424-530 cu ft that fall within both models' coverage, the HIVE 12 is the correct choice on the lighter dual 30A circuit; the HIVE 15 is the correct choice only when the room requires the larger output or exceeds 636 cu ft. For rooms from 637-813 cu ft, the HIVE 15 is the only full-size HIVE option. Both require the UKU Extension Box. Both use two separate circuits. Confirm panel capacity for either dual-circuit configuration before ordering. A licensed electrician is required. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE 12kW versus HIVE 15kW comparison same beehive cage different circuit and room range\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-hive-12-kw-240v-electric-sauna-heater-1182027824.jpg?v=1781548834\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE 12 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, operating without the required UKU Extension Box, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required. Do not connect to GFI\/GFCI breakers. Two separate 30A circuits required. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52281756516634,"sku":"H1003012","price":2848.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater_d0a54b4a-9d05-4c1a-a36b-854a59c3fc60.jpg?v=1779706224"},{"product_id":"huum-hive-15-hive-series-15-0kw-sauna-heater-1","title":"HUUM HIVE 15 HIVE Series 15.0kW Sauna Heater","description":"\u003cp\u003e\u003c!-- HUUM HIVE 15 - 15kW Floor-Standing Sauna Heater, Beehive Cage Form - Standalone --\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM HIVE 15 HIVE Series 15.0kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- SKU: H1003022 | HIVE Series | 530-813 cu ft | Floor-standing beehive cage | Heater only --\u003e\u003c!-- UKU control + UKU Extension Box + 528 lbs stones all sold separately --\u003e\u003c!-- Dual 50A circuits \/ 8 AWG | Heaviest HIVE circuit | SGS Listed | Made in Estonia --\u003e\u003c!-- 5-year warranty (elements excluded) --\u003e\u003c!-- 6 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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left: 4px; top: 16px; width: 7px; height: 7px; border-radius: 50%; background: #2563a8; }\n  .sl-check li strong { color: #0f172a !important; font-weight: 700; }\n  .sl-notice { background: #eff6ff; border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .sl-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .sl-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE 15 is a 15kW floor-standing electric sauna heater for rooms from 530 to 813 cubic feet, with the distinctive open beehive cage form. This listing is the heater only. A UKU control unit, UKU Extension Box, and sauna stones are all required for operation and sold separately. The HIVE 15 is the top-output model in the HUUM HIVE floor-standing series - the highest output and largest room coverage of any full-size HIVE, for rooms from 530 to 813 cubic feet on a dual 50A \/ 8 AWG circuit configuration. The UKU Extension Box is required at 15kW and must be purchased alongside the control and stones when ordering this standalone heater. For a complete installation in a single purchase, see the HUUM HIVE 15STU Package at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eTop of the HIVE series - 15kW and 530-813 cu ft\u003c\/h4\u003e\n\u003cp\u003eThe full-size HUUM HIVE series runs at two output levels: HIVE 12 (12kW, 424-636 cu ft, dual 30A \/ 10 AWG) and HIVE 15 (15kW, 530-813 cu ft, dual 50A \/ 8 AWG). The HIVE 15 is the higher output, for the larger room range - the top of the full-size HIVE family. For large dedicated sauna rooms from 530 to 813 cubic feet, commercial sauna installations, and high-capacity residential applications where the HIVE 12's 636 cu ft ceiling is insufficient, the HIVE 15 is the correct HIVE choice. Both models use the same 18.11\" (460 mm) open beehive cage form and 528-lb stone capacity - the difference is output, room range, and electrical specification. The HIVE 15's dual 50A \/ 8 AWG circuit is heavier than the HIVE 12's dual 30A \/ 10 AWG: two 50A breaker slots and two 8 AWG wire runs are required.\u003c\/p\u003e\n\u003ch4\u003eDual 50A \/ 8 AWG - the heaviest HIVE electrical configuration\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 15 requires two separate 50A \/ 8 AWG circuits - two 50A breaker slots in the electrical panel and two separate 8 AWG wire runs from the panel to the heater location. This is the heaviest electrical specification of any HUUM HIVE model: the HIVE 12 uses dual 30A \/ 10 AWG (lighter), and the HIVE Mini series uses single circuits at 30A, 50A, or 50A depending on model. Confirm the electrical panel has two available 50A slots before ordering. Two separate circuits means the wire run planning must account for both cables running to the heater location simultaneously. A licensed electrician is required for both circuit connections. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003ch4\u003e528 lbs of stones and three required components\u003c\/h4\u003e\n\u003cp\u003eAs with the HIVE 12, the HIVE 15 requires three separate component purchases alongside the heater: a UKU control unit (Local Black or WiFi), a UKU Extension Box (required at 15kW), and 528 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones. All three are sold separately at BathingBrands. The HIVE 15STU Package bundles all four components (heater, control, Extension Box, and stones) in a single purchase. When ordering the standalone heater, confirm all three required components are included in the order before checkout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e15kW floor-standing sauna heater for rooms from 530 to 813 cubic feet. Top of the HIVE series. Open 18.11\" beehive cage form. 528 lbs stone capacity - 2\"-4\" rounded olivine. Dual 50A \/ 8 AWG circuits - two separate 50A breakers and 8 AWG wire runs required. UKU Extension Box required - not included in this listing. Required (all sold separately): UKU control (Local Black or WiFi); UKU Extension Box; 528 lbs stones. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See HIVE 15STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e15 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e530 to 813 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eTop of the HIVE series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOpen 18.11\" beehive cage form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e528 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine stones (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDual 50A breakers \/ 8 AWG - two circuits\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box required (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e15 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit configuration\u003c\/td\u003e\n\u003ctd\u003eDual circuits - two separate 50A breakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge per circuit\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e530 to 813 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e528 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eOpen hexagonal beehive cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel cage and elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRequired components (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired at 15kW - sold separately at BathingBrands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones\u003c\/td\u003e\n\u003ctd\u003e528 lbs (2\"-4\" rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 12kW\u003c\/td\u003e\n\u003ctd\u003e424-636 cu ft | Dual 30A \/ 10 AWG | 528 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 15kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e530-813 cu ft | Dual 50A \/ 8 AWG | 528 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.6kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 330 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1003022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE 15kW floor-standing sauna heater - 18.11\" open beehive cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (all sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); UKU Extension Box (required at 15kW); 528 lbs sauna stones (2\"-4\" rounded olivine). \u003cstrong\u003eSee also:\u003c\/strong\u003e HIVE 15STU Package for all components bundled. A licensed electrician is required. Two 50A breakers and two 8 AWG wire runs needed. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE 15 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eTop of the HIVE series - 530-813 cu ft\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15 covers the largest room range of any full-size HIVE model - 530 to 813 cubic feet. For large dedicated sauna rooms, commercial sauna facilities, and high-capacity installations where the HIVE 12's 636 cu ft ceiling is insufficient, the HIVE 15 is the correct and only full-size HIVE choice. At 813 cu ft it covers some of the largest room volumes served by any residential-grade HUUM heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame beehive cage as HIVE 12 - more output\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15 uses the same 18.11\" open beehive cage form as the HIVE 12 and the same 528-lb stone capacity. The visible difference in the sauna room between the two models is zero - the same stone column, the same cage diameter, the same visual presence. The difference is entirely in the output (15kW vs 12kW), the room range (530-813 vs 424-636 cu ft), and the heavier dual 50A \/ 8 AWG circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e528 lbs of stone at 15kW - peak HIVE performance\u003c\/div\u003e\n\u003cp\u003eAt 15kW driving 528 lbs of stone mass, the HIVE 15 produces the fastest heat-up of any full-size HIVE model in the large rooms it serves and the greatest capacity to sustain temperature through continuous back-to-back commercial sessions. For a 530-813 cu ft sauna room with multiple bathers in rotation, the 528-lb stone load at 15kW provides the thermal reserve and recovery time that smaller heaters and lighter stone loads cannot match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDual 50A \/ 8 AWG - heaviest HIVE circuit\u003c\/div\u003e\n\u003cp\u003eTwo separate 50A breakers and two 8 AWG wire runs are the heaviest electrical specification of any HUUM HIVE heater. Confirm the panel has two available 50A slots before ordering. The HIVE 12 uses dual 30A \/ 10 AWG - if a lighter dual-circuit configuration is acceptable for the room size, the HIVE 12 is the less demanding electrical option where the room falls within the 424-636 cu ft overlap.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eExtension Box required - essential at 15kW\u003c\/div\u003e\n\u003cp\u003eThe UKU Extension Box is required for the HIVE 15 and is not included in this standalone listing. It is included in the HIVE 15STU Package. When ordering the standalone heater, add the Extension Box to the order with the UKU control and stones. Three separate item purchases are required: control, Extension Box, and stones. The HIVE 15STU Package bundles all four components in one purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eHIVE 15STU Package - the complete purchase path\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15STU Package at BathingBrands bundles the HIVE 15 heater, UKU control (Local Black or WiFi at checkout), UKU Extension Box, and 528 lbs of stones in a single purchase. For most new HIVE 15 installations, the Package is the more convenient option. This standalone listing is for buyers replacing just the heater in an existing HIVE 15 installation or sourcing components individually for a staged purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM HIVE 15kW floor-standing sauna heater 18.11 inch open beehive cage 528 lbs stone capacity dual 50A circuits top of HIVE series\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-sauna-heater_d0a54b4a-9d05-4c1a-a36b-854a59c3fc60.jpg?v=1779706224\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE 15. 15kW. 530-813 cu ft. 18.11\" beehive cage. 528 lbs of stone. Dual 50A circuits.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE 15 is the top-output model in the HUUM HIVE floor-standing series - the same 18.11\" open beehive cage and 528-lb stone capacity as the HIVE 12, now at 15kW for rooms from 530 to 813 cubic feet on dual 50A \/ 8 AWG circuits. This listing is the heater only. UKU control, UKU Extension Box, and 528 lbs of stones are all required and sold separately. See the HIVE 15STU Package for a bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e15kW, 530-813 cu ft\u003c\/strong\u003e - dual 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18.11\" open beehive cage\u003c\/strong\u003e - 528 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop of the HIVE series\u003c\/strong\u003e - largest output and room range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Extension Box required\u003c\/strong\u003e - sold separately (included in PKG)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHIVE 15STU Package available\u003c\/strong\u003e - all components bundled\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE 15 vs HIVE 12 - top vs entry full-size HIVE\u003c\/span\u003e\n\u003ch4\u003eHIVE 15 (dual 50A) vs HIVE 12 (dual 30A) - when each is correct\u003c\/h4\u003e\n\u003cp\u003eBoth full-size HIVE models share the same 18.11\" beehive cage form and 528-lb stone capacity. HIVE 12: 12kW, 424-636 cu ft, dual 30A \/ 10 AWG. HIVE 15: 15kW, 530-813 cu ft, dual 50A \/ 8 AWG. For rooms from 424-530 cu ft, the HIVE 12 is correct - it covers the range on the lighter dual 30A circuit. For rooms from 531-813 cu ft, the HIVE 15 is the only full-size HIVE option. For rooms in the 530-636 cu ft overlap zone, the HIVE 12 is adequate for standard well-insulated rooms; the HIVE 15 provides more output headroom for cold surfaces or high-frequency commercial use. The HIVE 15's dual 50A \/ 8 AWG requirement is significantly heavier than the HIVE 12's dual 30A \/ 10 AWG - confirm panel capacity for both 50A slots before selecting the HIVE 15 in a borderline room. Both require the UKU Extension Box. A licensed electrician is required for both. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM HIVE 15kW top of series versus HIVE 12 entry same beehive cage dual 50A versus dual 30A circuit comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/Hive_201.jpg?v=1779706273\u0026amp;width=800\" class=\"sl-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE 15 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, operating without the required UKU Extension Box, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required. Do not connect to GFI\/GFCI breakers. Two separate 50A circuits required. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52281780928794,"sku":"H1003022","price":3088.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater_d0a54b4a-9d05-4c1a-a36b-854a59c3fc60.jpg?v=1779706224"},{"product_id":"huum-hive-18-hive-series-18-0kw-sauna-heater","title":"HUUM HIVE 18 HIVE Series 18.0kW Sauna Heater","description":"\u003c!-- HUUM HIVE 15 - 15kW Floor-Standing Sauna Heater, Beehive Cage Form - Standalone --\u003e\u003c!-- SKU: H1003022 | HIVE Series | 530-813 cu ft | Floor-standing beehive cage | Heater only --\u003e\u003c!-- UKU control + UKU Extension Box + 528 lbs stones all sold separately --\u003e\u003c!-- Dual 50A circuits \/ 8 AWG | Heaviest HIVE circuit | SGS Listed | Made in Estonia --\u003e\u003c!-- 5-year warranty (elements excluded) --\u003e\u003c!-- 6 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eHUUM HIVE 18 HIVE Series 18.0kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE 15 is a 15kW floor-standing electric sauna heater for rooms from 530 to 813 cubic feet, with the distinctive open beehive cage form. This listing is the heater only. A UKU control unit, UKU Extension Box, and sauna stones are all required for operation and sold separately. The HIVE 15 is the top-output model in the HUUM HIVE floor-standing series - the highest output and largest room coverage of any full-size HIVE, for rooms from 530 to 813 cubic feet on a dual 50A \/ 8 AWG circuit configuration. The UKU Extension Box is required at 15kW and must be purchased alongside the control and stones when ordering this standalone heater. For a complete installation in a single purchase, see the HUUM HIVE 15STU Package at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eTop of the HIVE series - 15kW and 530-813 cu ft\u003c\/h4\u003e\n\u003cp\u003eThe full-size HUUM HIVE series runs at two output levels: HIVE 12 (12kW, 424-636 cu ft, dual 30A \/ 10 AWG) and HIVE 15 (15kW, 530-813 cu ft, dual 50A \/ 8 AWG). The HIVE 15 is the higher output, for the larger room range - the top of the full-size HIVE family. For large dedicated sauna rooms from 530 to 813 cubic feet, commercial sauna installations, and high-capacity residential applications where the HIVE 12's 636 cu ft ceiling is insufficient, the HIVE 15 is the correct HIVE choice. Both models use the same 18.11\" (460 mm) open beehive cage form and 528-lb stone capacity - the difference is output, room range, and electrical specification. The HIVE 15's dual 50A \/ 8 AWG circuit is heavier than the HIVE 12's dual 30A \/ 10 AWG: two 50A breaker slots and two 8 AWG wire runs are required.\u003c\/p\u003e\n\u003ch4\u003eDual 50A \/ 8 AWG - the heaviest HIVE electrical configuration\u003c\/h4\u003e\n\u003cp\u003eThe HIVE 15 requires two separate 50A \/ 8 AWG circuits - two 50A breaker slots in the electrical panel and two separate 8 AWG wire runs from the panel to the heater location. This is the heaviest electrical specification of any HUUM HIVE model: the HIVE 12 uses dual 30A \/ 10 AWG (lighter), and the HIVE Mini series uses single circuits at 30A, 50A, or 50A depending on model. Confirm the electrical panel has two available 50A slots before ordering. Two separate circuits means the wire run planning must account for both cables running to the heater location simultaneously. A licensed electrician is required for both circuit connections. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003ch4\u003e528 lbs of stones and three required components\u003c\/h4\u003e\n\u003cp\u003eAs with the HIVE 12, the HIVE 15 requires three separate component purchases alongside the heater: a UKU control unit (Local Black or WiFi), a UKU Extension Box (required at 15kW), and 528 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones. All three are sold separately at BathingBrands. The HIVE 15STU Package bundles all four components (heater, control, Extension Box, and stones) in a single purchase. When ordering the standalone heater, confirm all three required components are included in the order before checkout.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e15kW floor-standing sauna heater for rooms from 530 to 813 cubic feet. Top of the HIVE series. Open 18.11\" beehive cage form. 528 lbs stone capacity - 2\"-4\" rounded olivine. Dual 50A \/ 8 AWG circuits - two separate 50A breakers and 8 AWG wire runs required. UKU Extension Box required - not included in this listing. Required (all sold separately): UKU control (Local Black or WiFi); UKU Extension Box; 528 lbs stones. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See HIVE 15STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e15 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e530 to 813 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eTop of the HIVE series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eOpen 18.11\" beehive cage form\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e528 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e2\"-4\" rounded olivine stones (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eDual 50A breakers \/ 8 AWG - two circuits\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Extension Box required (sold separately)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e15 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit configuration\u003c\/td\u003e\n\u003ctd\u003eDual circuits - two separate 50A breakers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge per circuit\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e530 to 813 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e528 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eOpen hexagonal beehive cage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e18.11\" (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel cage and elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRequired components (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eRequired at 15kW - sold separately at BathingBrands\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones\u003c\/td\u003e\n\u003ctd\u003e528 lbs (2\"-4\" rounded olivine)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 12kW\u003c\/td\u003e\n\u003ctd\u003e424-636 cu ft | Dual 30A \/ 10 AWG | 528 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE 15kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e530-813 cu ft | Dual 50A \/ 8 AWG | 528 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9kW\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.6kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 330 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1003022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE 15kW floor-standing sauna heater - 18.11\" open beehive cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (all sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); UKU Extension Box (required at 15kW); 528 lbs sauna stones (2\"-4\" rounded olivine). \u003cstrong\u003eSee also:\u003c\/strong\u003e HIVE 15STU Package for all components bundled. A licensed electrician is required. Two 50A breakers and two 8 AWG wire runs needed. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE 15 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eTop of the HIVE series - 530-813 cu ft\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15 covers the largest room range of any full-size HIVE model - 530 to 813 cubic feet. For large dedicated sauna rooms, commercial sauna facilities, and high-capacity installations where the HIVE 12's 636 cu ft ceiling is insufficient, the HIVE 15 is the correct and only full-size HIVE choice. At 813 cu ft it covers some of the largest room volumes served by any residential-grade HUUM heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame beehive cage as HIVE 12 - more output\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15 uses the same 18.11\" open beehive cage form as the HIVE 12 and the same 528-lb stone capacity. The visible difference in the sauna room between the two models is zero - the same stone column, the same cage diameter, the same visual presence. The difference is entirely in the output (15kW vs 12kW), the room range (530-813 vs 424-636 cu ft), and the heavier dual 50A \/ 8 AWG circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e528 lbs of stone at 15kW - peak HIVE performance\u003c\/div\u003e\n\u003cp\u003eAt 15kW driving 528 lbs of stone mass, the HIVE 15 produces the fastest heat-up of any full-size HIVE model in the large rooms it serves and the greatest capacity to sustain temperature through continuous back-to-back commercial sessions. For a 530-813 cu ft sauna room with multiple bathers in rotation, the 528-lb stone load at 15kW provides the thermal reserve and recovery time that smaller heaters and lighter stone loads cannot match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eDual 50A \/ 8 AWG - heaviest HIVE circuit\u003c\/div\u003e\n\u003cp\u003eTwo separate 50A breakers and two 8 AWG wire runs are the heaviest electrical specification of any HUUM HIVE heater. Confirm the panel has two available 50A slots before ordering. The HIVE 12 uses dual 30A \/ 10 AWG - if a lighter dual-circuit configuration is acceptable for the room size, the HIVE 12 is the less demanding electrical option where the room falls within the 424-636 cu ft overlap.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eExtension Box required - essential at 15kW\u003c\/div\u003e\n\u003cp\u003eThe UKU Extension Box is required for the HIVE 15 and is not included in this standalone listing. It is included in the HIVE 15STU Package. When ordering the standalone heater, add the Extension Box to the order with the UKU control and stones. Three separate item purchases are required: control, Extension Box, and stones. The HIVE 15STU Package bundles all four components in one purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eHIVE 15STU Package - the complete purchase path\u003c\/div\u003e\n\u003cp\u003eThe HIVE 15STU Package at BathingBrands bundles the HIVE 15 heater, UKU control (Local Black or WiFi at checkout), UKU Extension Box, and 528 lbs of stones in a single purchase. For most new HIVE 15 installations, the Package is the more convenient option. This standalone listing is for buyers replacing just the heater in an existing HIVE 15 installation or sourcing components individually for a staged purchase.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-11\/HivePKG1.jpg\" alt=\"HUUM HIVE 15kW floor-standing sauna heater 18.11 inch open beehive cage 528 lbs stone capacity dual 50A circuits top of HIVE series\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE 15. 15kW. 530-813 cu ft. 18.11\" beehive cage. 528 lbs of stone. Dual 50A circuits.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE 15 is the top-output model in the HUUM HIVE floor-standing series - the same 18.11\" open beehive cage and 528-lb stone capacity as the HIVE 12, now at 15kW for rooms from 530 to 813 cubic feet on dual 50A \/ 8 AWG circuits. This listing is the heater only. UKU control, UKU Extension Box, and 528 lbs of stones are all required and sold separately. See the HIVE 15STU Package for a bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e15kW, 530-813 cu ft\u003c\/strong\u003e - dual 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18.11\" open beehive cage\u003c\/strong\u003e - 528 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTop of the HIVE series\u003c\/strong\u003e - largest output and room range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU Extension Box required\u003c\/strong\u003e - sold separately (included in PKG)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHIVE 15STU Package available\u003c\/strong\u003e - all components bundled\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eHIVE 15 vs HIVE 12 - top vs entry full-size HIVE\u003c\/span\u003e\n\u003ch4\u003eHIVE 15 (dual 50A) vs HIVE 12 (dual 30A) - when each is correct\u003c\/h4\u003e\n\u003cp\u003eBoth full-size HIVE models share the same 18.11\" beehive cage form and 528-lb stone capacity. HIVE 12: 12kW, 424-636 cu ft, dual 30A \/ 10 AWG. HIVE 15: 15kW, 530-813 cu ft, dual 50A \/ 8 AWG. For rooms from 424-530 cu ft, the HIVE 12 is correct - it covers the range on the lighter dual 30A circuit. For rooms from 531-813 cu ft, the HIVE 15 is the only full-size HIVE option. For rooms in the 530-636 cu ft overlap zone, the HIVE 12 is adequate for standard well-insulated rooms; the HIVE 15 provides more output headroom for cold surfaces or high-frequency commercial use. The HIVE 15's dual 50A \/ 8 AWG requirement is significantly heavier than the HIVE 12's dual 30A \/ 10 AWG - confirm panel capacity for both 50A slots before selecting the HIVE 15 in a borderline room. Both require the UKU Extension Box. A licensed electrician is required for both. Do not connect to GFI\/GFCI breakers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/Hive_201.jpg?crop=center\u0026amp;height=480\u0026amp;v=1779706273\u0026amp;width=480\" alt=\"HUUM HIVE 15kW top of series versus HIVE 12 entry same beehive cage dual 50A versus dual 30A circuit comparison\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline y2=\"3\" x2=\"21\" y1=\"14\" x1=\"10\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE 15 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, operating without the required UKU Extension Box, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required. Do not connect to GFI\/GFCI breakers. Two separate 50A circuits required. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52360735719706,"sku":"H1003032","price":3088.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-sauna-heater_d0a54b4a-9d05-4c1a-a36b-854a59c3fc60.jpg?v=1779706224"},{"product_id":"huum-hive-mini-9-hive-mini-series-9-0kw-sauna-heater","title":"HUUM HIVE Mini 9 HIVE Mini Series 9.0kW Sauna Heater","description":"\u003cp\u003e\u003c!-- HUUM HIVE Mini 9 - 9kW Floor-Standing Sauna Heater, Compact Beehive Form - Standalone --\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM HIVE Mini 9 HIVE Mini Series 9.0kW Sauna Heater\u003c\/h2\u003e\n\u003c!-- SKU: H1002022 | HIVE Mini Series | 318-530 cu ft | Floor-standing | Heater only --\u003e\u003c!-- UKU control + 330 lbs stones sold separately | No UKU Extension Box required --\u003e\u003c!-- Single 50A \/ 8 AWG | SGS Listed | Made in Estonia | 5-year warranty (elements excluded) --\u003e\u003c!-- 6 document sections: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE Mini 9 is a 9kW floor-standing electric sauna heater for rooms from 318 to 530 cubic feet, in the compact beehive form of the HIVE Mini series. This listing is the heater only. A UKU control unit and sauna stones are required for operation and sold separately. No UKU Extension Box is required at 9kW. The HIVE Mini 9 is the mid-range model in the HIVE Mini series - a step up from the HIVE Mini 6 (177-318 cu ft, 30A) for rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit. The same compact beehive cage, 330-lb stone capacity, and open hexagonal form as the HIVE Mini 6, now for the larger room range. For a complete installation, see the HUUM HIVE Mini 9STU Package at BathingBrands.\u003c\/p\u003e\n\u003ch4\u003eHIVE Mini 9 - 9kW beehive for 318-530 cu ft, no Extension Box\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini series covers three output levels without requiring a UKU Extension Box at 6kW and 9kW - only the HIVE Mini 10.6 adds the Extension Box requirement. The HIVE Mini 9 is the largest HIVE Mini that operates directly from the UKU control without additional hardware. At 9kW for rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit, it covers the mid-size dedicated home sauna room range - two-bench cabin saunas, purpose-built residential rooms, and smaller commercial installations - in the compact beehive form. For rooms above 530 cu ft that need the beehive aesthetic, the HIVE Mini 10.6 covers 353-706 cu ft with the Extension Box, or the full-size HIVE 12 covers 424-636 cu ft with a dual-circuit configuration.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stone - same capacity as HIVE Mini 6 and 10.6\u003c\/h4\u003e\n\u003cp\u003eAll three HIVE Mini models carry the same 330 lbs of 2\"-4\" (5-10 cm) rounded olivine diabase stones. At 9kW driving 330 lbs of stone mass, the HIVE Mini 9 provides more output per stone pound than the HIVE Mini 6 - faster heat-up in the 318-530 cu ft room range while maintaining the same large stone thermal reserve. Stones are sold separately and must be purchased alongside the UKU control for a complete installation. The Stone Requirements document below specifies the correct type and quantity.\u003c\/p\u003e\n\u003ch4\u003e50A \/ 8 AWG - heavier than HIVE Mini 6, same as HIVE Mini 10.6\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Mini 9 requires a single 50A \/ 8 AWG circuit - heavier than the HIVE Mini 6's 30A \/ 10 AWG but the same wire gauge as the HIVE Mini 10.6. The key difference between the HIVE Mini 9 and 10.6 is not the circuit specification but the Extension Box: the HIVE Mini 9 does not require one, the HIVE Mini 10.6 does. For rooms from 353-530 cu ft in the overlap zone between the two models, the HIVE Mini 9 is adequate for standard rooms and avoids the Extension Box; the HIVE Mini 10.6 provides more output headroom for cold surfaces or high-frequency use and adds the Extension Box. Confirm a 50A panel slot is available before ordering. A licensed electrician is required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003e9kW floor-standing sauna heater for rooms from 318 to 530 cubic feet. Compact beehive cage - HIVE Mini series. 330 lbs stone capacity. No UKU Extension Box required. The largest HIVE Mini without an Extension Box. UKU control (Local Black or WiFi) sold separately. Stones: 330 lbs (2\"-4\" rounded olivine) sold separately. Single 50A breaker, 8 AWG wire. 240V \/ 1-phase. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM. See HIVE Mini 9STU Package for complete bundled purchase.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 530 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eCompact beehive cage - HIVE Mini series\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eLargest HIVE Mini without Extension Box\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU control sold separately\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 530 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eNo - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded olivine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eDesign and installation\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm\u003c\/td\u003e\n\u003ctd\u003eOpen hexagonal beehive cage - HIVE Mini\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eStainless steel cage and elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl included\u003c\/td\u003e\n\u003ctd\u003eNo - UKU Local Black or WiFi sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eHIVE Mini series\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 6\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 9 (this listing)\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 330 lbs | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHIVE Mini 10.6\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 330 lbs | Ext box req\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android - remote preheat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 9kW HIVE Mini\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSKU\u003c\/td\u003e\n\u003ctd\u003eH1002022\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM HIVE Mini 9kW floor-standing sauna heater - compact beehive cage\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (sold separately):\u003c\/strong\u003e UKU control unit (Local Black or WiFi); 330 lbs sauna stones (2\"-4\" rounded olivine - see Stone Requirements). \u003cstrong\u003eSee also:\u003c\/strong\u003e HIVE Mini 9STU Package for a bundled purchase. A licensed electrician is required for the 50A \/ 8 AWG connection. Do not connect to a GFI\/GFCI breaker.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Mini 9 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e9kW beehive for 318-530 cu ft - no Extension Box\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 9 is the largest HIVE Mini that operates without a UKU Extension Box - connecting directly to the UKU control at 9kW on a single 50A \/ 8 AWG circuit. For rooms from 318 to 530 cubic feet where the HIVE Mini 6's 318 cu ft ceiling is insufficient, the HIVE Mini 9 extends the beehive aesthetic into the mid-size home sauna room range without adding the Extension Box hardware required by the HIVE Mini 10.6.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs of stone - same across all HIVE Mini models\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 9 carries the same 330-lb stone capacity as the HIVE Mini 6 and 10.6. At 9kW driving 330 lbs, the heat-up time for a 318-530 cu ft room is faster than at 6kW and the stone mass provides sustained temperature and consistent steam throughout the session. For mid-size home saunas with regular back-to-back use, the 330-lb stone load at 9kW delivers the recovery performance that smaller stone loads cannot match.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e50A \/ 8 AWG - same wire as HIVE Mini 10.6\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 9 and HIVE Mini 10.6 share the same 50A \/ 8 AWG wire specification. For rooms in the 353-530 cu ft overlap zone between the two models, the electrical planning is identical - the choice between them is whether the Extension Box is acceptable and whether the extra output headroom of the 10.6 is needed. If the 50A panel slot is available and 8 AWG wire is planned, either model can be selected based on room requirements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eHIVE Mini vs DROP 9 vs STEEL 9 at 318-530 cu ft\u003c\/div\u003e\n\u003cp\u003eFor rooms from 318 to 530 cu ft, three HUUM floor-standing heaters cover the range on a 50A \/ 8 AWG circuit: DROP 9 (wall-mounted, 122 lbs stones), STEEL 9 (slim stainless tower, 330 lbs stones), and HIVE Mini 9 (beehive cage, 330 lbs stones). The STEEL 9 and HIVE Mini 9 carry the same stone mass; the choice between them is form - slim rectangular tower vs open beehive cage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a mid-size sauna\u003c\/div\u003e\n\u003cp\u003eA 318-530 cu ft sauna room at 9kW takes 30-50 minutes to reach bathing temperature. The UKU WiFi option (sold separately) adds HUUM app remote preheat and scheduling on iOS and Android - start the sauna from work or from anywhere before arriving. No Extension Box is required for the HIVE Mini 9 WiFi upgrade. The UKU Local Black provides on-site digital control without app connectivity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eHIVE Mini 9STU Package - complete bundled option\u003c\/div\u003e\n\u003cp\u003eThe HIVE Mini 9STU Package at BathingBrands bundles the HIVE Mini 9 heater, UKU control (Local Black or WiFi at checkout), and 330 lbs of stones in a single purchase. This standalone listing is for buyers replacing just the heater or sourcing components individually. For most new HIVE Mini 9 installations, the Package is the more convenient path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM HIVE Mini 9kW floor-standing compact beehive cage sauna heater 330 lbs stone capacity 318-530 cu ft 50A circuit\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-mini-sauna-heater.jpg?v=1778272359\u0026amp;width=800\" class=\"sl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Mini 9. 9kW. 318-530 cu ft. Compact beehive cage. 330 lbs of stone. No Extension Box.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Mini 9 is the 9kW mid-range model in the HUUM HIVE Mini series - a compact open beehive cage carrying 330 lbs of 2\"-4\" rounded olivine stones for rooms from 318 to 530 cubic feet on a single 50A \/ 8 AWG circuit with no UKU Extension Box required. This listing is the heater only. UKU control and 330 lbs of stones are required and sold separately. See the HIVE Mini 9STU Package for a bundled purchase. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-530 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact beehive cage\u003c\/strong\u003e - HIVE Mini series, 330 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - largest HIVE Mini without one\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame 8 AWG wire as HIVE Mini 10.6\u003c\/strong\u003e - extension box is the only difference\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUKU control + stones sold separately\u003c\/strong\u003e - HIVE Mini 9STU Package also available\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Sauna-Heater-IOM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"sl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M18 13v6a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V8a2 2 0 0 1 2-2h6\"\u003e\u003c\/path\u003e\u003cpolyline points=\"15 3 21 3 21 9\"\u003e\u003c\/polyline\u003e\u003cline x1=\"10\" y1=\"14\" x2=\"21\" y2=\"3\"\u003e\u003c\/line\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Mini 9 is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V \/ 1PH (Home Use)","offer_id":52281857671450,"sku":"H1002022","price":2657.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-mini-sauna-heater.jpg?v=1778272359"},{"product_id":"huum-hive-wood-ls-17-hive-wood-series-sauna-stove-w-firebox-extension","title":"HUUM HIVE Wood LS 17 HIVE Wood Series Sauna Stove w\/ Firebox Extension","description":"\u003c!-- HUUM HIVE Wood LS 17 - HIVE Wood Series Sauna Stove with Firebox Extension - H1010012 --\u003e\u003c!-- SKU: H1010012 | HIVE Wood Series | 283-565 cu ft (8-16 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Model: HIVE Wood LS 17 | 17kW | Stainless steel body and door frame | Tempered glass door --\u003e\u003c!-- Maximizes negative ions from stones for healthy, mild, long-lasting steam --\u003e\u003c!-- Documents: Installation and Operation Manual | Warranty --\u003e\n\u003cstyle\u003e\n  .hw { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n  }\n  @media (max-width: 480px) {\n    .hw { padding: 0; }\n    .hw-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .hw-feat { padding: 0.8rem 0.9rem; }\n    .hw-inc-grid { grid-template-columns: 1fr; }\n    .hw-spec-grid { gap: 1.25rem; }\n    .hw-spec-table, .hw-spec-table tbody, .hw-spec-table tr, .hw-spec-table td { display: block; width: 100%; }\n    .hw-spec-table { border: none; }\n    .hw-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .hw-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .hw-spec-table td { border: none; padding: 1px 0; }\n    .hw-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .hw-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .hw-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hw\"\u003e\n\u003cdiv class=\"hw-desc\"\u003e\n\u003ch2 class=\"product-meta__title heading h3\"\u003eHUUM HIVE Wood LS 17 Sauna Stove\u003c\/h2\u003e\n\u003cdiv class=\"@app\"\u003e\n\u003cdiv class=\"shopify-block shopify-app-block\" id=\"shopify-block-AVDBwR2VFTVRTRFphd__a85eace0-7976-4319-9804-004cb28d3e5f\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003eThe HUUM HIVE Wood LS 17 is a 17kW wood-burning sauna stove for rooms from 283 to 565 cubic feet with a firebox extension that allows wood to be loaded from an adjacent room or from outside the building. LS stands for the firebox extension configuration - the stove body and stone cage sit inside the sauna while the firebox opening passes through the wall to face the adjacent space. The stainless steel body is built on HUUM's core design philosophy: use as little metal as possible so that heat comes primarily from the stones rather than from metal surfaces. The result is a stove with a 287-lb stone capacity (9 boxes, sold separately) that delivers what HUUM describes as healthy, mild, and long-lasting steam - maximizing the negative ions released by stones and minimizing the positive ions associated with heated metal. The most sensitive component of the HIVE Wood - the flame tamer - is made from 5mm (0.20 in) thick stainless steel, making it exceptionally durable under sustained high-temperature use. The stainless steel-framed tempered glass door faces the adjacent room in the LS configuration, giving the person tending the fire a direct view of the flames. Stones and chimney connection sold separately. 5-year limited warranty. Designed, engineered, and precision-crafted in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eLS firebox extension - load from outside, bathe undisturbed inside\u003c\/h4\u003e\n\u003cp\u003eThe LS in HIVE Wood LS 17 identifies the firebox extension configuration. The firebox bushing passes through the sauna wall into an adjacent room or outdoors, so wood is added and the fire is managed from outside the sauna at all times. The bathers inside the sauna are completely undisturbed - the sauna door stays closed, no heat is lost to wood loading, and the 287-lb stone mass continues radiating heat through the session without interruption. The stainless steel-framed tempered glass door faces the adjacent room in the LS configuration, allowing the person tending the fire to watch the flames while the sauna is in use. HUUM notes in the installation manual that the firebox bushing must pass through a non-combustible wall (stone, concrete, or similar), with mineral wool insulation recommended around the bushing. At least 0.4 in (10mm) must be left between the bushing and the stove for air circulation.\u003c\/p\u003e\n\u003ch4\u003e287 lbs of stones - heat from stones, not metal\u003c\/h4\u003e\n\u003cp\u003eHUUM's design philosophy for the HIVE Wood is explicit and precise: HUUM heaters are built using very little metal so that the heat comes mainly from the stones and very little from the metal. This approach maximises the good negative ions released by the stones - consistent with the traditional sauna experience where stones are the primary heat source - and keeps the positive ions from heated metal surfaces at a minimum. At 287 lbs (130 kg), the HIVE Wood LS 17's stone capacity is among the largest of any residential wood-burning sauna stove in the same output class. The large number of exposed stones provides long-lasting heat retention and outstanding steam capability. The flame tamer, positioned above the fire to distribute heat into the stone mass, is made from 5mm stainless steel - robust enough to handle sustained high-heat exposure across years of regular use.\u003c\/p\u003e\n\u003ch4\u003eStainless steel construction and tempered glass door\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Wood LS 17 body, firebox door frame, and flame tamer are all stainless steel - chosen for corrosion resistance, thermal durability, and the organic, modern aesthetic of the HIVE series. The tempered glass within the robust stainless steel-framed door provides both a view of the fire and safety during operation. The HIVE Wood's design is described by HUUM as bringing ancient wisdom of building sauna stoves to a new level - a reference to the stone-primary heating philosophy combined with precision stainless steel construction. The flue outlet is at the top of the stove, accepting a 115mm (4.5\") chimney connection. A 6\" North American adapter is required and sold separately. Maximum firewood length is 15.75\" (400mm). A licensed chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-hook\"\u003e17kW wood-burning sauna stove with firebox extension for rooms from 283 to 565 cubic feet. HIVE Wood LS - firebox extension passes through sauna wall, wood loaded from adjacent room or outdoors. Tempered glass door faces adjacent room. Bathers inside sauna are undisturbed throughout the session. No electricity required. 287 lbs sauna stones required (9 x 33-lb boxes, sold separately). Stone-primary heat design - very little metal mass, heat comes mainly from stones. 5mm thick stainless steel flame tamer. Stainless steel body and door frame. Top flue connection - 115mm - 6\" adapter required for North America (sold separately). Max firewood 15.75\" (400mm). Dimensions: 21.9\"W x 29.1\"D x 29.5\"H. Weight: 165 lbs (75 kg). Pallet delivery - scheduled freight required. 5-year limited warranty. CE certified. Designed and precision-crafted in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"hw-badges\"\u003e\n\u003cspan class=\"hw-badge\"\u003e17 kW\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e283 to 565 cu ft\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eHIVE Wood LS - firebox extension through sauna wall\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eWood loaded from adjacent room or outdoors\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eTempered glass door faces adjacent room\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eBathers inside sauna undisturbed\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eWood-burning - no electricity required\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eStone-primary heat - minimal metal mass by design\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e287 lbs sauna stones required (9 x 33-lb boxes)\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e5mm stainless steel flame tamer - durable\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eStainless steel body and door frame\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eTop flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eMax firewood 15.75\" (400mm)\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e21.9\"W x 29.1\"D x 29.5\"H - 165 lbs\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e5-year limited warranty\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eCE certified - designed in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-notice-yellow\"\u003e⚠️ \u003cstrong\u003e287 lbs sauna stones required (9 x 33-lb boxes, HUUM Stones 24) - not included. 6\" North American flue adapter required - not included. Pallet delivery.\u003c\/strong\u003e Stones and the 6\" adapter must be purchased separately. The firebox bushing must pass through a non-combustible wall (stone or concrete) per the HUUM installation manual. Mineral wool insulation is recommended around the bushing. A licensed chimney professional is recommended for all flue installations. This stove ships by scheduled pallet freight - a delivery appointment is required. At 165 lbs, plan for on-site assistance to move from the delivery point to the installation position.\u003c\/div\u003e\n\u003cdiv class=\"hw-notice\"\u003eℹ️ \u003cstrong\u003eHIVE Wood LS 17 vs HIVE Wood 17 - LS firebox extension vs standard interior firebox, same stove otherwise.\u003c\/strong\u003e HIVE Wood 17: standard interior firebox - door faces into the sauna room, wood loaded from inside. HIVE Wood LS 17 H1010012 (this listing): LS firebox extension - firebox bushing passes through the sauna wall, wood loaded from an adjacent room or outdoors, tempered glass door faces adjacent room, bathers inside undisturbed. Both share identical output (17kW), room range (283-565 cu ft), stone capacity (287 lbs, 9 x 33-lb boxes), stainless steel construction, 5mm flame tamer, 115mm top flue, and 5-year warranty. The LS configuration adds approximately 9 inches of depth for the firebox extension. Choose the HIVE Wood 17 for standard interior loading. Choose the HIVE Wood LS 17 for exterior loading convenience and an undisturbed sauna session.\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"hw-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e17 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e283 to 565 cu ft (8-16 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e287 lbs \/ 130 kg (9 x 33-lb boxes) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax firewood length\u003c\/td\u003e\n\u003ctd\u003e15.75 in (400 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat philosophy\u003c\/td\u003e\n\u003ctd\u003eStone-primary - minimal metal mass by design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eLS firebox extension\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox access\u003c\/td\u003e\n\u003ctd\u003eFrom outside the sauna room via wall bushing extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door faces\u003c\/td\u003e\n\u003ctd\u003eAdjacent room - fire view from outside sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall requirement\u003c\/td\u003e\n\u003ctd\u003eNon-combustible wall (stone or concrete) required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation requirement\u003c\/td\u003e\n\u003ctd\u003eMineral wool around bushing recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir gap requirement\u003c\/td\u003e\n\u003ctd\u003eMin. 0.4 in (10 mm) between bushing and stove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eFlue and installation\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\") - top connection only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e21.9 in (555 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth (with LS extension)\u003c\/td\u003e\n\u003ctd\u003e29.1 in (740 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5 in (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e165 lbs (75 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor frame\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor glass\u003c\/td\u003e\n\u003ctd\u003eTempered glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame tamer\u003c\/td\u003e\n\u003ctd\u003e0.20 in (5 mm) thick stainless steel - exceptionally durable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign philosophy\u003c\/td\u003e\n\u003ctd\u003eMinimal metal mass - heat from stones not metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse environment\u003c\/td\u003e\n\u003ctd\u003eInterior - wet area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eCertifications and warranty\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and precision-crafted in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective cage\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-ceiling\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-wall\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Wall Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - barrel\u003c\/td\u003e\n\u003ctd\u003eHUUM Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater heater\u003c\/td\u003e\n\u003ctd\u003eHUUM WaterEx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American flue adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"hw-inc-grid\"\u003e\n\u003cdiv class=\"hw-inc-item\"\u003eHUUM HIVE Wood LS 17 wood-burning sauna stove with firebox extension\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003eStainless steel-framed tempered glass door\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003e5mm stainless steel flame tamer\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003e5-year limited warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 287 lbs sauna stones (9 x 33-lb boxes, HUUM Stones 24 recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM WaterEx. A licensed chimney professional is recommended for all flue installations. The LS firebox bushing requires a non-combustible wall.\u003c\/p\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Wood LS 17 stands out\u003c\/h3\u003e\n\u003cdiv class=\"hw-feat-grid\"\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eStone-primary heat - minimal metal, maximum negative ions\u003c\/div\u003e\n\u003cp\u003eHUUM's design philosophy for the HIVE Wood is built into the structure itself: the stove uses as little metal as possible so that heat comes primarily from the stones and very little from the metal surfaces. This directly implements the traditional sauna logic where stones are the heat source and metal is only the structure. HUUM states the goal explicitly: maximize the good negative ions from the stones, as in traditional saunas, and keep the positive ions from the metal at a minimum. Together with the 287-lb stone capacity, this approach delivers what HUUM describes as healthy, mild, and long-lasting steam - the defining quality difference that separates the HIVE Wood from heaters where metal surfaces account for a significant portion of the radiant heat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eFirebox extension - load from outside, sauna stays closed\u003c\/div\u003e\n\u003cp\u003eThe LS firebox extension allows wood to be added from an adjacent room or outdoors without opening the sauna door. For the bathers inside, the session continues without interruption - no heat loss, no draft, no intrusion. The tempered glass door faces the adjacent room in the LS configuration, so the person tending the fire has a direct view of the flames throughout. The firebox bushing must pass through a non-combustible wall (stone or concrete) per the HUUM installation manual. For a cabin sauna with an adjoining relaxation area or a sauna building where the fire is managed from outdoors, the HIVE Wood LS 17 is built for exactly this installation type.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003e287 lbs of stones - long-lasting heat and outstanding steam\u003c\/div\u003e\n\u003cp\u003eAt 287 lbs (130 kg), the HIVE Wood LS 17 stone capacity is substantial - HUUM describes the result directly: long-lasting heat retention and outstanding steam capability. The large exposed stone surface above the flame tamer accumulates heat throughout the fire and holds it in the stone mass long after the fire has burned down. For a sauna session where the fire cannot be constantly tended from inside - which is the entire point of the LS configuration - the stone thermal mass is what sustains the session. Nine boxes of 33-lb sauna stones (HUUM Stones 24 recommended) fill the stone cavity to the required minimum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003e5mm stainless steel flame tamer - exceptionally durable\u003c\/div\u003e\n\u003cp\u003eThe flame tamer is the component of a wood-burning sauna stove most exposed to direct flame contact over sustained high-temperature use. HUUM built the HIVE Wood's flame tamer from 5mm (0.20 in) thick stainless steel specifically because it is the most sensitive component of the stove. HUUM describes this directly: the flame tamer is made of 0.20 in \/ 5 mm thick stainless steel and is therefore exceptionally durable. This thickness is significantly more robust than typical flame tamer construction and is a key long-term durability advantage of the HIVE Wood platform. The 5-year limited warranty reflects HUUM's confidence in the overall build quality of which the flame tamer is the most demanding component.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eOrganic stainless steel design - designed in Estonia\u003c\/div\u003e\n\u003cp\u003eThe HIVE Wood LS 17 combines the organic hexagonal aesthetic of the HUUM HIVE design language with all-stainless steel construction. The stainless steel body, door frame, and flame tamer resist corrosion and heat discolouration across years of regular use. The tempered glass door provides a clear view of the fire from the adjacent room in the LS configuration. HUUM describes the HIVE Wood as bringing ancient wisdom of building sauna stoves to a new level - a precise summary of their stone-primary, low-metal-mass design approach applied to precision stainless steel construction. Designed, engineered, and precision-crafted in Estonia. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eHIVE Wood Series - 13kW and 17kW configurations\u003c\/div\u003e\n\u003cp\u003eThe H1010012 is the 17kW LS (firebox extension) configuration of the HIVE Wood Series. The same HIVE Wood platform is available as: HIVE Wood 13 (13kW, 212-459 cu ft, 199 lbs stones \/ 6 x 33-lb boxes, standard interior firebox), HIVE Wood 17 (17kW, 283-565 cu ft, 287 lbs stones, standard interior firebox), and HIVE Wood LS 17 (this listing, 17kW, 283-565 cu ft, 287 lbs stones, LS firebox extension for exterior loading). All HIVE Wood stoves share the same stone-primary design philosophy, 5mm stainless steel flame tamer, stainless steel construction, 115mm top flue connection, and 5-year limited warranty. HUUM also offers the HIVE Electric and DROP Electric heater lines for electric sauna heating. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"hw-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM HIVE Wood LS 17 H1010012 17kW wood-burning sauna stove firebox extension stainless steel 283-565 cu ft 287 lbs stones\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-wood-ls-17-sauna-stove-1182036245.jpg?v=1781541643\u0026amp;width=800\" class=\"hw-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hw-brand-tag\"\u003eDesigned in Estonia - CE Certified - HIVE Wood Series - LS Firebox Extension\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Wood LS 17. 17kW. 283-565 cu ft. 287 lbs of stones. Stone-primary heat. Exterior loading.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company built on the principle that heat should come from stones, not metal. The HIVE Wood LS 17 is a 17kW wood-burning sauna stove with firebox extension for loading from an adjacent room or outdoors - 287 lbs of stones, 5mm stainless steel flame tamer, stainless steel body and door frame, and tempered glass door facing the adjacent room. Sauna stones (9 x 33-lb boxes), chimney connection, and 6\" flue adapter are required and sold separately. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"hw-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e17kW wood-burning\u003c\/strong\u003e - 283-565 cu ft - no electricity required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS firebox extension\u003c\/strong\u003e - wood loaded from adjacent room - tempered glass door faces outside\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e287 lbs sauna stones required (9 x 33-lb boxes)\u003c\/strong\u003e - stone-primary heat design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5mm stainless steel flame tamer\u003c\/strong\u003e - stainless steel body and door frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e115mm top flue - 6\" adapter required\u003c\/strong\u003e - pallet delivery - 5-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hw-brand-tag\"\u003eHIVE Wood LS 17 vs HIVE Wood 17 vs HIVE Wood 13 - HIVE Wood Series selection guide\u003c\/span\u003e\n\u003ch4\u003eHIVE Wood LS 17 vs HIVE Wood 17 vs HIVE Wood 13 - choosing the right HIVE Wood configuration\u003c\/h4\u003e\n\u003cp\u003eThree HIVE Wood configurations serve different room sizes and loading preferences. HIVE Wood 13: 13kW, 212-459 cu ft (6-13 m3), 199 lbs stones (6 x 33-lb boxes), standard interior firebox. Right for medium sauna rooms where interior wood loading is acceptable and 13kW is adequate output. HIVE Wood 17: 17kW, 283-565 cu ft (8-16 m3), 287 lbs stones (9 x 33-lb boxes), standard interior firebox. Right for the 283-565 cu ft range where interior loading is acceptable and 17kW with 287 lbs of stones is the correct specification. HIVE Wood LS 17 H1010012 (this listing): 17kW, 283-565 cu ft, 287 lbs stones (9 x 33-lb boxes), LS firebox extension. Identical output and stone capacity to the HIVE Wood 17 with the addition of the firebox extension for loading from outside the sauna. Right when exterior loading convenience and undisturbed sauna sessions are priorities and the wall between the sauna and adjacent space is non-combustible (stone or concrete). All three share the same stone-primary heat design, 5mm stainless steel flame tamer, stainless steel body, 115mm top flue, and 5-year warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM HIVE Wood LS 17 exterior loading vs HIVE Wood 17 interior loading vs HIVE Wood 13 smaller room comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-wood-ls-17-sauna-stove-1182036246.jpg?v=1781541673\u0026amp;width=800\" class=\"hw-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"hw-manual\"\u003e\n\u003cdiv class=\"hw-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/www.bathingbrands.com\/54916\/huum\/hive-wood-ls-17\/wood-sauna-stoves\" class=\"hw-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/www.bathingbrands.com\/54916\/huum\/hive-wood-ls-17\/wood-sauna-stoves\" class=\"hw-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"hw-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Wood LS 17 carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines in the manual, use of incorrect or uncertified sauna stones, operating without the required stone load, chimney-related damage from inadequate maintenance, or improper preparation of the LS firebox wall penetration (non-combustible wall required). A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52357357994266,"sku":"H1010012","price":2618.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-stove-huum-hive-wood-ls-17-sauna-stove-1182036245.jpg?v=1781541643"},{"product_id":"huum-hive-wood-17-hive-wood-series-sauna-stove","title":"HUUM HIVE Wood 17 HIVE Wood Series Sauna Stove","description":"\u003c!-- HUUM HIVE Wood LS 17 - HIVE Wood Series Sauna Stove with Firebox Extension - H1010012 --\u003e\u003c!-- SKU: H1010012 | HIVE Wood Series | 283-565 cu ft (8-16 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Model: HIVE Wood LS 17 | 17kW | Stainless steel body and door frame | Tempered glass door --\u003e\u003c!-- LS = firebox extension for loading from adjacent room or outdoors --\u003e\u003c!-- 287 lbs sauna stones required (9 boxes x 33 lbs, sold separately) - HUUM Stones 24 --\u003e\u003c!-- 5mm thick stainless steel flame tamer - exceptionally durable --\u003e\u003c!-- Low metal mass design - heat comes primarily from stones, not metal --\u003e\u003c!-- Maximizes negative ions from stones for healthy, mild, long-lasting steam --\u003e\u003c!-- Top flue connection | 115mm flue | 6\" adapter required for North America --\u003e\u003c!-- Max firewood: 15.75\" (400mm) | Dimensions: 21.9\"W x 29.1\"D x 29.5\"H | Weight: 165 lbs (75 kg) --\u003e\u003c!-- Optional: HUUM Cage HSTV | Thru-Ceiling Chimney Kit | Thru-Wall Chimney Kit | WaterEx --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- CE certified | Designed and precision-crafted in Estonia by HUUM --\u003e\u003c!-- 5-year limited warranty --\u003e\u003c!-- Documents: Installation and Operation Manual | Warranty --\u003e\n\u003cstyle\u003e\n  .hw { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .hw-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hw\"\u003e\n\u003cdiv class=\"hw-desc\"\u003e\n\u003ch2\u003eHUUM HIVE Wood 17 HIVE Wood Series Sauna Stove\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE Wood LS 17 is a 17kW wood-burning sauna stove for rooms from 283 to 565 cubic feet with a firebox extension that allows wood to be loaded from an adjacent room or from outside the building. LS stands for the firebox extension configuration - the stove body and stone cage sit inside the sauna while the firebox opening passes through the wall to face the adjacent space. The stainless steel body is built on HUUM's core design philosophy: use as little metal as possible so that heat comes primarily from the stones rather than from metal surfaces. The result is a stove with a 287-lb stone capacity (9 boxes, sold separately) that delivers what HUUM describes as healthy, mild, and long-lasting steam - maximizing the negative ions released by stones and minimizing the positive ions associated with heated metal. The most sensitive component of the HIVE Wood - the flame tamer - is made from 5mm (0.20 in) thick stainless steel, making it exceptionally durable under sustained high-temperature use. The stainless steel-framed tempered glass door faces the adjacent room in the LS configuration, giving the person tending the fire a direct view of the flames. Stones and chimney connection sold separately. 5-year limited warranty. Designed, engineered, and precision-crafted in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eLS firebox extension - load from outside, bathe undisturbed inside\u003c\/h4\u003e\n\u003cp\u003eThe LS in HIVE Wood LS 17 identifies the firebox extension configuration. The firebox bushing passes through the sauna wall into an adjacent room or outdoors, so wood is added and the fire is managed from outside the sauna at all times. The bathers inside the sauna are completely undisturbed - the sauna door stays closed, no heat is lost to wood loading, and the 287-lb stone mass continues radiating heat through the session without interruption. The stainless steel-framed tempered glass door faces the adjacent room in the LS configuration, allowing the person tending the fire to watch the flames while the sauna is in use. HUUM notes in the installation manual that the firebox bushing must pass through a non-combustible wall (stone, concrete, or similar), with mineral wool insulation recommended around the bushing. At least 0.4 in (10mm) must be left between the bushing and the stove for air circulation.\u003c\/p\u003e\n\u003ch4\u003e287 lbs of stones - heat from stones, not metal\u003c\/h4\u003e\n\u003cp\u003eHUUM's design philosophy for the HIVE Wood is explicit and precise: HUUM heaters are built using very little metal so that the heat comes mainly from the stones and very little from the metal. This approach maximises the good negative ions released by the stones - consistent with the traditional sauna experience where stones are the primary heat source - and keeps the positive ions from heated metal surfaces at a minimum. At 287 lbs (130 kg), the HIVE Wood LS 17's stone capacity is among the largest of any residential wood-burning sauna stove in the same output class. The large number of exposed stones provides long-lasting heat retention and outstanding steam capability. The flame tamer, positioned above the fire to distribute heat into the stone mass, is made from 5mm stainless steel - robust enough to handle sustained high-heat exposure across years of regular use.\u003c\/p\u003e\n\u003ch4\u003eStainless steel construction and tempered glass door\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Wood LS 17 body, firebox door frame, and flame tamer are all stainless steel - chosen for corrosion resistance, thermal durability, and the organic, modern aesthetic of the HIVE series. The tempered glass within the robust stainless steel-framed door provides both a view of the fire and safety during operation. The HIVE Wood's design is described by HUUM as bringing ancient wisdom of building sauna stoves to a new level - a reference to the stone-primary heating philosophy combined with precision stainless steel construction. The flue outlet is at the top of the stove, accepting a 115mm (4.5\") chimney connection. A 6\" North American adapter is required and sold separately. Maximum firewood length is 15.75\" (400mm). A licensed chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-hook\"\u003e17kW wood-burning sauna stove with firebox extension for rooms from 283 to 565 cubic feet. HIVE Wood LS - firebox extension passes through sauna wall, wood loaded from adjacent room or outdoors. Tempered glass door faces adjacent room. Bathers inside sauna are undisturbed throughout the session. No electricity required. 287 lbs sauna stones required (9 x 33-lb boxes, sold separately). Stone-primary heat design - very little metal mass, heat comes mainly from stones. 5mm thick stainless steel flame tamer. Stainless steel body and door frame. Top flue connection - 115mm - 6\" adapter required for North America (sold separately). Max firewood 15.75\" (400mm). Dimensions: 21.9\"W x 29.1\"D x 29.5\"H. Weight: 165 lbs (75 kg). Pallet delivery - scheduled freight required. 5-year limited warranty. CE certified. Designed and precision-crafted in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"hw-badges\"\u003e\n\u003cspan class=\"hw-badge\"\u003e17 kW\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e283 to 565 cu ft\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eHIVE Wood LS - firebox extension through sauna wall\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eWood loaded from adjacent room or outdoors\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eTempered glass door faces adjacent room\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eBathers inside sauna undisturbed\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eWood-burning - no electricity required\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eStone-primary heat - minimal metal mass by design\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e287 lbs sauna stones required (9 x 33-lb boxes)\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e5mm stainless steel flame tamer - durable\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eStainless steel body and door frame\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eTop flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eMax firewood 15.75\" (400mm)\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e21.9\"W x 29.1\"D x 29.5\"H - 165 lbs\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003e5-year limited warranty\u003c\/span\u003e \u003cspan class=\"hw-badge\"\u003eCE certified - designed in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-notice-yellow\"\u003e⚠️ \u003cstrong\u003e287 lbs sauna stones required (9 x 33-lb boxes, HUUM Stones 24) - not included. 6\" North American flue adapter required - not included. Pallet delivery.\u003c\/strong\u003e Stones and the 6\" adapter must be purchased separately. The firebox bushing must pass through a non-combustible wall (stone or concrete) per the HUUM installation manual. Mineral wool insulation is recommended around the bushing. A licensed chimney professional is recommended for all flue installations. This stove ships by scheduled pallet freight - a delivery appointment is required. At 165 lbs, plan for on-site assistance to move from the delivery point to the installation position.\u003c\/div\u003e\n\u003cdiv class=\"hw-notice\"\u003eℹ️ \u003cstrong\u003eHIVE Wood LS 17 vs HIVE Wood 17 - LS firebox extension vs standard interior firebox, same stove otherwise.\u003c\/strong\u003e HIVE Wood 17: standard interior firebox - door faces into the sauna room, wood loaded from inside. HIVE Wood LS 17 H1010012 (this listing): LS firebox extension - firebox bushing passes through the sauna wall, wood loaded from an adjacent room or outdoors, tempered glass door faces adjacent room, bathers inside undisturbed. Both share identical output (17kW), room range (283-565 cu ft), stone capacity (287 lbs, 9 x 33-lb boxes), stainless steel construction, 5mm flame tamer, 115mm top flue, and 5-year warranty. The LS configuration adds approximately 9 inches of depth for the firebox extension. Choose the HIVE Wood 17 for standard interior loading. Choose the HIVE Wood LS 17 for exterior loading convenience and an undisturbed sauna session.\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"hw-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e17 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e283 to 565 cu ft (8-16 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e287 lbs \/ 130 kg (9 x 33-lb boxes) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax firewood length\u003c\/td\u003e\n\u003ctd\u003e15.75 in (400 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat philosophy\u003c\/td\u003e\n\u003ctd\u003eStone-primary - minimal metal mass by design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eLS firebox extension\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox access\u003c\/td\u003e\n\u003ctd\u003eFrom outside the sauna room via wall bushing extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door faces\u003c\/td\u003e\n\u003ctd\u003eAdjacent room - fire view from outside sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall requirement\u003c\/td\u003e\n\u003ctd\u003eNon-combustible wall (stone or concrete) required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulation requirement\u003c\/td\u003e\n\u003ctd\u003eMineral wool around bushing recommended\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir gap requirement\u003c\/td\u003e\n\u003ctd\u003eMin. 0.4 in (10 mm) between bushing and stove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eFlue and installation\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\") - top connection only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e21.9 in (555 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth (with LS extension)\u003c\/td\u003e\n\u003ctd\u003e29.1 in (740 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.5 in (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e165 lbs (75 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor frame\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoor glass\u003c\/td\u003e\n\u003ctd\u003eTempered glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame tamer\u003c\/td\u003e\n\u003ctd\u003e0.20 in (5 mm) thick stainless steel - exceptionally durable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign philosophy\u003c\/td\u003e\n\u003ctd\u003eMinimal metal mass - heat from stones not metal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse environment\u003c\/td\u003e\n\u003ctd\u003eInterior - wet area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eCertifications and warranty\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eCE certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and precision-crafted in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"hw-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective cage\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-ceiling\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-wall\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Wall Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - barrel\u003c\/td\u003e\n\u003ctd\u003eHUUM Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater heater\u003c\/td\u003e\n\u003ctd\u003eHUUM WaterEx\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American flue adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"hw-inc-grid\"\u003e\n\u003cdiv class=\"hw-inc-item\"\u003eHUUM HIVE Wood LS 17 wood-burning sauna stove with firebox extension\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003eStainless steel-framed tempered glass door\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003e5mm stainless steel flame tamer\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"hw-inc-item\"\u003e5-year limited warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 287 lbs sauna stones (9 x 33-lb boxes, HUUM Stones 24 recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM WaterEx. A licensed chimney professional is recommended for all flue installations. The LS firebox bushing requires a non-combustible wall.\u003c\/p\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Wood LS 17 stands out\u003c\/h3\u003e\n\u003cdiv class=\"hw-feat-grid\"\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eStone-primary heat - minimal metal, maximum negative ions\u003c\/div\u003e\n\u003cp\u003eHUUM's design philosophy for the HIVE Wood is built into the structure itself: the stove uses as little metal as possible so that heat comes primarily from the stones and very little from the metal surfaces. This directly implements the traditional sauna logic where stones are the heat source and metal is only the structure. HUUM states the goal explicitly: maximize the good negative ions from the stones, as in traditional saunas, and keep the positive ions from the metal at a minimum. Together with the 287-lb stone capacity, this approach delivers what HUUM describes as healthy, mild, and long-lasting steam - the defining quality difference that separates the HIVE Wood from heaters where metal surfaces account for a significant portion of the radiant heat.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eFirebox extension - load from outside, sauna stays closed\u003c\/div\u003e\n\u003cp\u003eThe LS firebox extension allows wood to be added from an adjacent room or outdoors without opening the sauna door. For the bathers inside, the session continues without interruption - no heat loss, no draft, no intrusion. The tempered glass door faces the adjacent room in the LS configuration, so the person tending the fire has a direct view of the flames throughout. The firebox bushing must pass through a non-combustible wall (stone or concrete) per the HUUM installation manual. For a cabin sauna with an adjoining relaxation area or a sauna building where the fire is managed from outdoors, the HIVE Wood LS 17 is built for exactly this installation type.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003e287 lbs of stones - long-lasting heat and outstanding steam\u003c\/div\u003e\n\u003cp\u003eAt 287 lbs (130 kg), the HIVE Wood LS 17 stone capacity is substantial - HUUM describes the result directly: long-lasting heat retention and outstanding steam capability. The large exposed stone surface above the flame tamer accumulates heat throughout the fire and holds it in the stone mass long after the fire has burned down. For a sauna session where the fire cannot be constantly tended from inside - which is the entire point of the LS configuration - the stone thermal mass is what sustains the session. Nine boxes of 33-lb sauna stones (HUUM Stones 24 recommended) fill the stone cavity to the required minimum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003e5mm stainless steel flame tamer - exceptionally durable\u003c\/div\u003e\n\u003cp\u003eThe flame tamer is the component of a wood-burning sauna stove most exposed to direct flame contact over sustained high-temperature use. HUUM built the HIVE Wood's flame tamer from 5mm (0.20 in) thick stainless steel specifically because it is the most sensitive component of the stove. HUUM describes this directly: the flame tamer is made of 0.20 in \/ 5 mm thick stainless steel and is therefore exceptionally durable. This thickness is significantly more robust than typical flame tamer construction and is a key long-term durability advantage of the HIVE Wood platform. The 5-year limited warranty reflects HUUM's confidence in the overall build quality of which the flame tamer is the most demanding component.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eOrganic stainless steel design - designed in Estonia\u003c\/div\u003e\n\u003cp\u003eThe HIVE Wood LS 17 combines the organic hexagonal aesthetic of the HUUM HIVE design language with all-stainless steel construction. The stainless steel body, door frame, and flame tamer resist corrosion and heat discolouration across years of regular use. The tempered glass door provides a clear view of the fire from the adjacent room in the LS configuration. HUUM describes the HIVE Wood as bringing ancient wisdom of building sauna stoves to a new level - a precise summary of their stone-primary, low-metal-mass design approach applied to precision stainless steel construction. Designed, engineered, and precision-crafted in Estonia. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-feat\"\u003e\n\u003cdiv class=\"hw-feat-title\"\u003eHIVE Wood Series - 13kW and 17kW configurations\u003c\/div\u003e\n\u003cp\u003eThe H1010012 is the 17kW LS (firebox extension) configuration of the HIVE Wood Series. The same HIVE Wood platform is available as: HIVE Wood 13 (13kW, 212-459 cu ft, 199 lbs stones \/ 6 x 33-lb boxes, standard interior firebox), HIVE Wood 17 (17kW, 283-565 cu ft, 287 lbs stones, standard interior firebox), and HIVE Wood LS 17 (this listing, 17kW, 283-565 cu ft, 287 lbs stones, LS firebox extension for exterior loading). All HIVE Wood stoves share the same stone-primary design philosophy, 5mm stainless steel flame tamer, stainless steel construction, 115mm top flue connection, and 5-year limited warranty. HUUM also offers the HIVE Electric and DROP Electric heater lines for electric sauna heating. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"hw-brand1\"\u003e\n\u003cimg alt=\"HUUM HIVE Wood LS 17 H1010012 17kW wood-burning sauna stove firebox extension stainless steel 283-565 cu ft 287 lbs stones\" src=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-02\/HUUM-HIVE-Wood-LS-17-Sauna-Stove.jpg\" class=\"hw-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hw-brand-tag\"\u003eDesigned in Estonia - CE Certified - HIVE Wood Series - LS Firebox Extension\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Wood LS 17. 17kW. 283-565 cu ft. 287 lbs of stones. Stone-primary heat. Exterior loading.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company built on the principle that heat should come from stones, not metal. The HIVE Wood LS 17 is a 17kW wood-burning sauna stove with firebox extension for loading from an adjacent room or outdoors - 287 lbs of stones, 5mm stainless steel flame tamer, stainless steel body and door frame, and tempered glass door facing the adjacent room. Sauna stones (9 x 33-lb boxes), chimney connection, and 6\" flue adapter are required and sold separately. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"hw-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e17kW wood-burning\u003c\/strong\u003e - 283-565 cu ft - no electricity required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLS firebox extension\u003c\/strong\u003e - wood loaded from adjacent room - tempered glass door faces outside\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e287 lbs sauna stones required (9 x 33-lb boxes)\u003c\/strong\u003e - stone-primary heat design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5mm stainless steel flame tamer\u003c\/strong\u003e - stainless steel body and door frame\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e115mm top flue - 6\" adapter required\u003c\/strong\u003e - pallet delivery - 5-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hw-brand-tag\"\u003eHIVE Wood LS 17 vs HIVE Wood 17 vs HIVE Wood 13 - HIVE Wood Series selection guide\u003c\/span\u003e\n\u003ch4\u003eHIVE Wood LS 17 vs HIVE Wood 17 vs HIVE Wood 13 - choosing the right HIVE Wood configuration\u003c\/h4\u003e\n\u003cp\u003eThree HIVE Wood configurations serve different room sizes and loading preferences. HIVE Wood 13: 13kW, 212-459 cu ft (6-13 m3), 199 lbs stones (6 x 33-lb boxes), standard interior firebox. Right for medium sauna rooms where interior wood loading is acceptable and 13kW is adequate output. HIVE Wood 17: 17kW, 283-565 cu ft (8-16 m3), 287 lbs stones (9 x 33-lb boxes), standard interior firebox. Right for the 283-565 cu ft range where interior loading is acceptable and 17kW with 287 lbs of stones is the correct specification. HIVE Wood LS 17 H1010012 (this listing): 17kW, 283-565 cu ft, 287 lbs stones (9 x 33-lb boxes), LS firebox extension. Identical output and stone capacity to the HIVE Wood 17 with the addition of the firebox extension for loading from outside the sauna. Right when exterior loading convenience and undisturbed sauna sessions are priorities and the wall between the sauna and adjacent space is non-combustible (stone or concrete). All three share the same stone-primary heat design, 5mm stainless steel flame tamer, stainless steel body, 115mm top flue, and 5-year warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM HIVE Wood LS 17 exterior loading vs HIVE Wood 17 interior loading vs HIVE Wood 13 smaller room comparison\" src=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-02\/HUUM-HIVE-Wood-LS-17-Sauna-Stove.jpg\" class=\"hw-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"hw-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"hw-manual\"\u003e\n\u003cdiv class=\"hw-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Wood-Sauna-Stove-IOM.pdf\" class=\"hw-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hw-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"hw-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"hw-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Wood LS 17 carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines in the manual, use of incorrect or uncertified sauna stones, operating without the required stone load, chimney-related damage from inadequate maintenance, or improper preparation of the LS firebox wall penetration (non-combustible wall required). A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52357407375642,"sku":"H1009012","price":2350.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/hive_wood_17_main_480x480_10cac0b2-25a6-4566-824b-ec2e6e6e7ea6.jpg?v=1781544276"},{"product_id":"huum-hive-flow-mini-wood-burning-sauna-stove-8-5kw","title":"HUUM HIVE Flow Mini Wood-Burning Sauna Stove, 8.5kW","description":"\u003c!-- HUUM HIVE Flow Mini - Wood-Burning Sauna Stove - H1017012 --\u003e\u003c!-- SKU: H1017012 | HIVE Flow Series | 212-494 cu ft (6-14 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Model: HIVE Flow Mini | 8.5kW | Stainless steel body (5mm top \/ 3mm sides) --\u003e\u003c!-- Patent-pending furnace design: 75% of heat stays in sauna (vs typical 50%) --\u003e\u003c!-- Safety distances from combustible materials: only 150mm (5.9\") - among lowest available --\u003e\u003c!-- CO emissions: 346 mg\/m3 (vs 1000+ mg\/m3 in comparable stoves) --\u003e\u003c!-- Particulate matter: 25 mg\/m3 - lowest in its category --\u003e\u003c!-- BImSchV certified (German clean combustion standard) --\u003e\u003c!-- Steam lasts up to 30 minutes after fire is out --\u003e\u003c!-- 231 lbs \/ 105 kg stones required (7 boxes, sold separately) --\u003e\u003c!-- Top or back flue connection | 115mm | 6\" adapter required for North America --\u003e\u003c!-- Max firewood: 11.8\" (300mm) --\u003e\u003c!-- Dimensions: 17.7\"W (450mm) x 21.1\"D (537mm) x 34.8\"H (884mm) --\u003e\u003c!-- Includes: metal grate, heat resistant glove, splints, metal fixing plates x2, ash grate, cleaning hatches x2, ash drawer --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- BImSchV certified | CPR certified | Designed and made in Estonia by HUUM --\u003e\u003c!-- 5-year limited warranty --\u003e\u003c!-- Documents: IOM | Warranty | Certificate | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .hf { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .hf-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hf\"\u003e\n\u003cdiv class=\"hf-desc\"\u003e\n\u003ch2\u003eHUUM HIVE Flow Mini Wood-Burning Sauna Stove, 8.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE Flow Mini is an 8.5kW wood-burning sauna stove for rooms from 212 to 494 cubic feet, designed around a patent-pending furnace construction that retains 75% of the heat from firewood inside the sauna - significantly more than conventional sauna stoves where much of the heat escapes through the chimney. The result is a stove that uses less firewood per session, produces dramatically lower emissions, and delivers steam that lasts up to 30 minutes after the fire is out. CO emissions are just 346 mg\/m3 - compared to over 1,000 mg\/m3 in comparable stoves - and particulate matter output is only 25 mg\/m3, the lowest in its output category. Safety distances from combustible materials are just 150mm (5.9\") all sides, achieved through the Flow's unique furnace design rather than requiring a protective sheath. The stainless steel body (5mm thick top panels, 3mm sides) holds 231 lbs (105 kg) of sauna stones (7 boxes, sold separately), and the large glass door provides a view of the flames from inside the sauna room. Top or back chimney connection. Max firewood length 11.8\" (300mm). BImSchV certified and CPR certified. 5-year limited warranty. Designed, engineered, and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003ePatent-pending Flow furnace - 75% heat retention, 4 sessions from 3 loads of wood\u003c\/h4\u003e\n\u003cp\u003eThe defining feature of the HIVE Flow Mini is its patent-pending furnace construction. Air flows inside the heater in a unique pattern that allows 75% of the heat generated from burning wood to directly heat the sauna rather than escaping through the chimney. HUUM's own description of the practical effect is precise: you can enjoy four sessions with the same amount of wood that would typically provide three sauna sessions. This is not a marginal efficiency gain - it is a 33% increase in sessions per unit of firewood. The Flow design also dramatically reduces emissions as a byproduct of the more complete combustion: CO output is 346 mg\/m3 against over 1,000 mg\/m3 in comparable stoves, and particulate matter output of 25 mg\/m3 is the lowest in its category. The BImSchV certification - the rigorous German clean combustion standard - confirms that the HIVE Flow Mini's emissions performance is independently verified, not just claimed.\u003c\/p\u003e\n\u003ch4\u003e5.9\" safety distances - ultra-compact clearances from combustible materials\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow Mini's patent-pending furnace construction also produces an exceptional safety clearance profile. The required distance from combustible materials is just 150mm (5.9\") on all sides - compared to the 200-500mm required by conventional sauna stoves of the same output class. HUUM attributes this directly to the unique construction: thanks to its unique patent-pending construction, the HIVE Flow stove has safety distances from combustible materials of just 150mm, compared to the usual 200-500mm. For a sauna room in the 212-494 cu ft range where every inch of space around the stove impacts bench layout flexibility, the HIVE Flow Mini's tight clearances directly increase the usable area of the sauna room without requiring any additional protective sheath or shield.\u003c\/p\u003e\n\u003ch4\u003e231 lbs of stones - steam lasts up to 30 minutes after the fire is out\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow Mini holds 231 lbs (105 kg) of sauna stones in an open stone cage above the furnace. The large exposed stone surface and the efficient heat transfer of the Flow furnace charge the stone mass thoroughly during the fire. HUUM's own description of the steam quality is direct: prolonged heat retention and steam that lasts up to 30 minutes after the fire is out. For a small to medium home sauna where the session continues after the fire burns down naturally, the stone thermal mass combined with the 75% heat retention of the Flow furnace means the sauna holds its temperature and steam quality well beyond what the fire itself produces. Rounded sauna stones 5-10 cm in diameter are recommended for milder steam. The large glass door allows the fire to be visible throughout the session. Top or back chimney connection accommodates different installation configurations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-hook\"\u003e8.5kW wood-burning sauna stove for rooms from 212 to 494 cubic feet. HIVE Flow Mini - patent-pending furnace design retains 75% of heat in sauna (vs typical 50%). Four sessions from the wood that typically gives three. CO emissions: 346 mg\/m3 (vs 1,000+ in comparable stoves). Particulate matter: 25 mg\/m3 - lowest in its category. Safety distances: 150mm (5.9\") from combustible materials all sides - no protective sheath required. Steam lasts up to 30 minutes after fire is out. 231 lbs stones required (7 boxes, sold separately). 5mm top panels - 3mm sides. Large glass door. Top or back flue connection (115mm). Max firewood 11.8\" (300mm). 6\" adapter required for North America (sold separately). Dimensions: 17.7\"W x 21.1\"D x 34.8\"H. BImSchV certified - CPR certified. Pallet delivery - scheduled freight required. 5-year limited warranty. Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"hf-badges\"\u003e\n\u003cspan class=\"hf-badge\"\u003e8.5 kW\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003e212 to 494 cu ft\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eHIVE Flow Mini - patent-pending furnace design\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003e75% heat retention - 4 sessions from 3 wood loads\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eCO: 346 mg\/m3 (vs 1,000+ in comparable stoves)\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eParticulate matter: 25 mg\/m3 - lowest in category\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eSafety: 150mm (5.9\") all sides combustible - no sheath required\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003e231 lbs stones required (7 boxes)\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eSteam lasts up to 30 min after fire is out\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003e5mm top panels - 3mm sides stainless steel\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eLarge glass door - fire view inside sauna\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eTop or back flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eMax firewood 11.8\" (300mm)\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003e17.7\"W x 21.1\"D x 34.8\"H\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eBImSchV certified - CPR certified\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003e5-year limited warranty\u003c\/span\u003e \u003cspan class=\"hf-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"hf-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"hf-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e8.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e212 to 494 cu ft (6-14 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e231 lbs \/ 105 kg (7 boxes) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax firewood length\u003c\/td\u003e\n\u003ctd\u003e11.8 in (300 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam after fire out\u003c\/td\u003e\n\u003ctd\u003eUp to 30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003eFlow furnace efficiency and emissions\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat retention in sauna\u003c\/td\u003e\n\u003ctd\u003e75% of firewood heat stays in sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSessions per wood load\u003c\/td\u003e\n\u003ctd\u003e4 sessions vs 3 for conventional stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCO emissions\u003c\/td\u003e\n\u003ctd\u003e346 mg\/m3 (vs 1,000+ mg\/m3 in comparable stoves)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParticulate matter\u003c\/td\u003e\n\u003ctd\u003e25 mg\/m3 - lowest in its category\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFurnace design\u003c\/td\u003e\n\u003ctd\u003ePatent-pending - unique airflow pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eBImSchV (German clean combustion) | CPR certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003eSafety distances (combustible materials)\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides\u003c\/td\u003e\n\u003ctd\u003e5.9 in (150 mm) - achieved via Flow furnace design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVs conventional stoves\u003c\/td\u003e\n\u003ctd\u003eConventional: 200-500 mm | HIVE Flow: 150 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective sheath required\u003c\/td\u003e\n\u003ctd\u003eNo - clearances achieved by furnace design alone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e17.7 in (450 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e21.1 in (537 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e34.8 in (884 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop panels\u003c\/td\u003e\n\u003ctd\u003e5 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides\u003c\/td\u003e\n\u003ctd\u003e3 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door\u003c\/td\u003e\n\u003ctd\u003eLarge - fire view from inside sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eDirect contact between stones and heating surface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh management\u003c\/td\u003e\n\u003ctd\u003eAsh drawer included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCleaning access\u003c\/td\u003e\n\u003ctd\u003e2 cleaning hatches included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003eFlue and certifications\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection position\u003c\/td\u003e\n\u003ctd\u003eTop or back - selected during installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eBImSchV (German) | CPR certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned, engineered, and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"hf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective cage\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-ceiling\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-wall\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Wall Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - barrel\u003c\/td\u003e\n\u003ctd\u003eHUUM Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor protection\u003c\/td\u003e\n\u003ctd\u003eHUUM Protective Plate | HUUM Protective Bed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hf-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"hf-inc-grid\"\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eHUUM HIVE Flow Mini 8.5kW wood-burning sauna stove\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eMetal grate\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eHeat resistant glove\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eSplints\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eMetal fixing plates (x2)\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eAsh grate\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eCleaning hatches (x2)\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eAsh drawer\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"hf-inc-item\"\u003e5-year limited warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 231 lbs sauna stones (7 boxes, rounded 5-10 cm diameter recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM Protective Plate or Protective Bed. A licensed chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003chr class=\"hf-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Flow Mini stands out\u003c\/h3\u003e\n\u003cdiv class=\"hf-feat-grid\"\u003e\n\u003cdiv class=\"hf-feat\"\u003e\n\u003cdiv class=\"hf-feat-title\"\u003ePatent-pending Flow furnace - 75% heat retention\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow Mini's patent-pending furnace creates a unique airflow pattern that keeps 75% of the heat generated from burning wood inside the sauna rather than letting it escape through the chimney. HUUM describes the practical result directly: you can enjoy four sessions with the same amount of wood that would typically provide three. This is a 33% improvement in sessions per unit of firewood - not a marginal gain. The Flow furnace design is the reason the HIVE Flow Mini produces dramatically lower emissions, achieves tighter safety clearances, and delivers steam that lasts longer after the fire goes out than a conventional stove of the same output class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-feat\"\u003e\n\u003cdiv class=\"hf-feat-title\"\u003eCO at 346 mg\/m3 - 3x cleaner than comparable stoves\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow Mini's CO emissions of 346 mg\/m3 compare to over 1,000 mg\/m3 in comparable wood-burning sauna stoves. Particulate matter output of 25 mg\/m3 is the lowest in its output category. These are not relative claims - they are measured values certified by BImSchV, the German clean combustion standard that is among the most rigorous emission standards applied to wood-burning appliances. The CPR certification confirms the stove's performance characteristics are formally declared. For buyers who want a wood-fired sauna experience but are conscious of wood combustion emissions - both for air quality inside the sauna building and environmental impact - the HIVE Flow Mini is the purpose-built specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-feat\"\u003e\n\u003cdiv class=\"hf-feat-title\"\u003e5.9\" safety distances - no protective sheath needed\u003c\/div\u003e\n\u003cp\u003eMost wood-burning sauna stoves in the 8-9kW range require 200-500mm from combustible materials. The HIVE Flow Mini requires just 150mm (5.9\") on all sides, achieved through the Flow furnace design rather than through a separate protective sheath. This distinction matters: a sheath is an additional purchase, an additional component to install, and adds visual bulk around the stove. The HIVE Flow Mini achieves tighter clearances without any of these additions. For a small sauna room in the 212-494 cu ft range where the stove is close to bench structures and wall panels, 5.9\" all-round clearances give significantly more layout flexibility than even the most shielded conventional stoves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-feat\"\u003e\n\u003cdiv class=\"hf-feat-title\"\u003e231 lbs of stones - steam for up to 30 min after the fire\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow Mini's 231-lb stone load holds substantial thermal energy from the fire. HUUM describes the heat output as gentle and long-lasting - the high stone capacity relative to the stove's 8.5kW output ensures that the stones are the primary heat source during the session, not the fire itself. After the fire goes out, the charged stone mass continues delivering heat and steam for up to 30 minutes. For a home sauna where the session continues naturally past the fire's peak, the stone thermal mass sustains the experience without requiring another load of wood. Rounded sauna stones 5-10 cm in diameter are recommended by HUUM for milder, more pleasant steam quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-feat\"\u003e\n\u003cdiv class=\"hf-feat-title\"\u003eTop or back flue - glass door - complete installation flexibility\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow Mini offers both top and back flue connection options, selected during installation to match the chimney routing - top connection for through-roof installations, back connection for through-wall configurations. This dual-connection flexibility accommodates the widest range of sauna room layouts without adapter plates or modifications. The large glass door on the front face provides a fire view from inside the sauna room throughout the session. Two cleaning hatches allow the interior combustion chambers to be accessed for maintenance without disassembling the stove. The ash drawer catches and holds ash between sessions, making ash removal clean and contained.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-feat\"\u003e\n\u003cdiv class=\"hf-feat-title\"\u003eHIVE Flow Series - Mini and Mini LS configurations\u003c\/div\u003e\n\u003cp\u003eThe H1017012 is the standard interior-firebox configuration of the HIVE Flow Mini platform. The same 8.5kW Flow furnace is also available as the HIVE Flow Mini LS, which adds a firebox extension approximately 4.7 inches longer than the standard configuration, allowing wood to be loaded from an adjacent room or outdoors while the glass door faces the adjacent space for a fireplace view. Both configurations share the same patent-pending furnace, emissions performance, stone capacity, safety distances, and 5-year warranty. HUUM also offers the HIVE Flow (larger, for bigger rooms), the HIVE Wood Series (different stone-primary philosophy for standard combustion), and the HIVE Electric Series for electric sauna heating. Designed and made in Estonia. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hf-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"hf-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"hf-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-flow-mini-sauna-stove-1182034873.jpg?v=1781555115\u0026amp;width=800\" alt=\"HUUM HIVE Flow Mini H1017012 8.5kW wood-burning sauna stove 212-494 cu ft patent-pending furnace 231 lbs stones 75% heat retention\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hf-brand-tag\"\u003eDesigned in Estonia - BImSchV Certified - HIVE Flow Series - Patent-Pending Furnace\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Flow Mini. 8.5kW. 212-494 cu ft. 75% heat retention. CO 346 mg\/m3. 5.9\" clearances.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Flow Mini is 8.5kW with a patent-pending furnace that retains 75% of firewood heat inside the sauna, produces CO emissions of 346 mg\/m3 (vs 1,000+ in comparable stoves), achieves 5.9\" safety distances from combustible materials without a protective sheath, and delivers steam for up to 30 minutes after the fire is out. BImSchV certified. 231 lbs stones (7 boxes) and chimney connection required and sold separately. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"hf-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.5kW wood-burning\u003c\/strong\u003e - 212-494 cu ft - patent-pending Flow furnace\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75% heat retention\u003c\/strong\u003e - 4 sessions per 3 wood loads - CO 346 mg\/m3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e231 lbs stones required (7 boxes)\u003c\/strong\u003e - steam lasts up to 30 min after fire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.9\" safety distances all sides\u003c\/strong\u003e - no protective sheath required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBImSchV certified\u003c\/strong\u003e - top or back flue - 5-year warranty - made in Estonia\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hf-brand-tag\"\u003eHIVE Flow Mini vs HIVE Wood LS 17 vs HUUM HIVE 12 - stove selection guide\u003c\/span\u003e\n\u003ch4\u003eHIVE Flow Mini vs HIVE Wood LS 17 vs HIVE 12 Electric - choosing the right HUUM sauna heater\u003c\/h4\u003e\n\u003cp\u003eThree HUUM heaters serve different room sizes, fuel types, and efficiency priorities. HUUM HIVE Flow Mini H1017012 (this listing): 8.5kW wood-burning, 212-494 cu ft, patent-pending Flow furnace (75% heat retention, CO 346 mg\/m3, 5.9\" clearances), 231 lbs stones (7 boxes), interior firebox, standard configuration. The most efficient and lowest-emission wood-burning option in the HUUM lineup. Right for small to medium home saunas where wood-firing efficiency, low emissions, and tight safety clearances are the priority. HUUM HIVE Wood LS 17 H1010012: 17kW wood-burning, 283-565 cu ft, LS firebox extension (exterior loading, glass door faces adjacent room), 287 lbs stones (9 boxes), stone-primary heat philosophy. Right for medium to large rooms where exterior wood loading and the HUUM stone-primary experience are the priority. HUUM HIVE 12 Electric: 12kW electric, 424-636 cu ft, UKU controller + extension box required, 550 lbs stones (approx. 17 boxes), beehive-inspired open cylindrical design, floor-standing. Right for large home and commercial saunas where electric heating with a sculptural stone column is the specification. Choose the HIVE Flow Mini for the 212-494 cu ft range where 8.5kW wood-firing efficiency, very low emissions, and the Flow furnace's 75% heat retention are the right combination.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"hf-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-flow-mini-sauna-stove-1182034869.jpg?v=1781555170\u0026amp;width=800\" alt=\"HUUM HIVE Flow Mini 8.5kW efficient wood vs HIVE Wood LS 17 exterior feed vs HIVE 12 electric sauna heater comparison\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"hf-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"hf-manual\"\u003e\n\u003cdiv class=\"hf-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"hf-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Flow-Sauna-Stove-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"hf-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-manual-item\"\u003e\n\u003ch6\u003eCertificate\u003c\/h6\u003e\n\u003ca class=\"hf-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-HIVE-Flow-Mini-Sauna-Stove-BImSchV-Certificate.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hf-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"hf-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"hf-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Flow Mini carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of incorrect or uncertified sauna stones (decorative stones in particular must not be used as they can break under heat), operating without the required stone load, or chimney-related damage from inadequate maintenance. A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52358334972186,"sku":"H1017012","price":2898.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-stove-huum-hive-flow-mini-sauna-stove-1182034873.jpg?v=1781555115"},{"product_id":"huum-hive-flow-ls-wood-burning-sauna-stove-w-firebox-extension-9-8kw","title":"HUUM HIVE Flow LS Wood-Burning Sauna Stove w\/ Firebox Extension, 9.8kW","description":"\u003cp\u003e\u003c!-- HUUM HIVE Flow LS - Wood-Burning Sauna Stove with Firebox Extension - H1016012 --\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM HIVE Flow LS Wood-Burning Sauna Stove w\/ Firebox Extension, 9.8kW\u003c\/h2\u003e\n\u003c!-- SKU: H1016012 | HIVE Flow Series | 282-635 cu ft (8-18 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Model: HIVE Flow LS | 9.8kW | Stainless steel body (5mm top \/ 3mm sides) --\u003e\u003c!-- LS = firebox extension through wall | wood loaded from adjacent room or outdoors --\u003e\u003c!-- Glass door faces adjacent room | HUUM HIVE Flow LS 161 lbs \/ 73 kg --\u003e\u003c!-- Patent-pending furnace design: 75% of heat stays in sauna --\u003e\u003c!-- Safety distances from combustible materials: 150mm sides and back \/ 500mm front --\u003e\u003c!-- CO emissions: 346 mg\/m3 | PM: 25 mg\/m3 --\u003e\u003c!-- BImSchV certified (German clean combustion) | CPR certified --\u003e\u003c!-- Steam lasts over 30 minutes after fire is out --\u003e\u003c!-- 330 lbs \/ 150 kg stones required (10 boxes) + optional stone cage adds 77-88 lbs --\u003e\u003c!-- Top or back flue connection | 115mm | 6\" adapter required for North America --\u003e\u003c!-- Max firewood: 11.8\" (300mm) --\u003e\u003c!-- Dimensions: 20.7\"W (530mm) x 29.5\"D (750mm) x 34.8\"H (884mm) --\u003e\u003c!-- Includes: metal grate, heat resistant glove, splints, metal fixing plates x2, ash grate, cleaning hatches x2, ash drawer --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- 5-year limited warranty (excluding elements) --\u003e\u003c!-- Documents: IOM | Warranty | Certificate | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .fl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .fl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"fl\"\u003e\n\u003cdiv class=\"fl-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE Flow LS is a 9.8kW wood-burning sauna stove for rooms from 282 to 635 cubic feet with a firebox extension that passes through the sauna wall for loading from an adjacent room or outdoors. LS identifies the through-wall firebox configuration: the stove body and 330-lb stone cage sit inside the sauna, the firebox bushing extends through the wall, and the glass door faces the adjacent room. Bathers inside the sauna are completely undisturbed throughout the session. The HIVE Flow LS is the larger configuration of the HUUM Flow platform - 9.8kW vs the HIVE Flow Mini's 8.5kW, 330 lbs of stones vs 231 lbs, and a larger room range of 282-635 cu ft vs 212-494 cu ft. Both share the same patent-pending furnace design that retains 75% of firewood heat inside the sauna, produces CO emissions of just 346 mg\/m3 (vs 1,000+ in comparable stoves), achieves particulate matter output of 25 mg\/m3 - the lowest in its category - and achieves safety distances of just 150mm (5.9\") at the sides and back from combustible materials. The HIVE Flow LS weighs 161 lbs (73 kg). Top or back 115mm chimney connection. Max firewood 11.8\" (300mm). BImSchV and CPR certified. 5-year limited warranty (excluding elements). Designed, engineered, and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eLS firebox extension - load from outside, sauna session undisturbed\u003c\/h4\u003e\n\u003cp\u003eThe LS configuration of the HIVE Flow adds a firebox bushing that passes through the sauna wall into an adjacent room or outdoors. Wood is loaded, the fire is managed, and the glass door allows the person in the adjacent space to watch the flames - all from outside the sauna. Bathers inside receive 9.8kW of heat and the steam from 330 lbs of stones without the sauna door opening for firewood at any point in the session. HUUM's own description of the LS model is direct: it allows you to heat the sauna from an adjacent room. The large glass furnace door enhances the cozy ambiance of the adjacent space, letting you enjoy the mesmerizing flames while the sauna warms. For a cabin sauna with a lounge, a sauna building where the fire is managed from outdoors, or any layout where exterior wood loading is operationally preferred, the HIVE Flow LS is the purpose-built configuration.\u003c\/p\u003e\n\u003ch4\u003eFlow furnace - 75% heat retention, lowest emissions in its category\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow LS shares the same patent-pending furnace design as the HIVE Flow Mini. Air flows inside the heater in a unique pattern that keeps 75% of the heat generated from burning wood inside the sauna rather than escaping through the chimney. HUUM's own summary of the practical effect: you can enjoy four sessions with the same amount of wood that would typically provide three sauna sessions. CO emissions of 346 mg\/m3 compare to over 1,000 mg\/m3 in comparable stoves. Particulate matter output of 25 mg\/m3 is the lowest in its output category. BImSchV certification (the German clean combustion standard) and CPR certification confirm these are independently verified values, not manufacturer claims. The same Flow furnace design also produces the 150mm (5.9\") safety distances at the sides and back - the heater warms up more evenly across the stove body, allowing snug installation that conventional stoves cannot achieve.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stones - up to 408 lbs with optional stone cage\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow LS holds 330 lbs (150 kg) of sauna stones in its primary stone compartment, and an optional HUUM stone cage accessory (sold separately) adds capacity for a further 77-88 lbs (35-40 kg) of stones for a total of up to 418 lbs (190 kg). HUUM's description of this configuration is straightforward: the large stone volume allows full sauna bathing even over 30 minutes after the fire has died. The 330-lb primary stone load charges thoroughly during the fire - at 9.8kW, the HIVE Flow LS heats faster than the Mini while holding more thermal mass - and the charged stones sustain heat and steam long after the fire burns down. Rounded sauna stones 5-10 cm in diameter are recommended by HUUM for milder steam and better air circulation through the stone mass. Max firewood length is 11.8\" (300mm).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-hook\"\u003e9.8kW wood-burning sauna stove with firebox extension for rooms from 282 to 635 cubic feet. HIVE Flow LS - firebox extends through sauna wall, wood loaded from adjacent room or outdoors. Glass door faces adjacent room. Bathers inside sauna undisturbed. Patent-pending Flow furnace: 75% heat retention - 4 sessions from 3 loads of wood. CO: 346 mg\/m3 (vs 1,000+ in comparable stoves). PM: 25 mg\/m3 - lowest in category. Safety distances: 150mm (5.9\") sides and back - 500mm (19.7\") front from combustible materials. No protective sheath required. 330 lbs stones required (10 boxes, sold separately). Up to 408 lbs with optional stone cage. Steam lasts over 30 min after fire is out. 5mm top \/ 3mm sides stainless steel. Large glass door. Top or back flue - 115mm. Max firewood 11.8\" (300mm). 6\" adapter required for North America (sold separately). Dimensions: 20.7\"W x 29.5\"D x 34.8\"H. 161 lbs. BImSchV certified - CPR certified. Pallet delivery required. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"fl-badges\"\u003e\n\u003cspan class=\"fl-badge\"\u003e9.8 kW\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003e282 to 635 cu ft\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eHIVE Flow LS - firebox extension through sauna wall\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eWood loaded from adjacent room or outdoors\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eGlass door faces adjacent room\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003e75% heat retention - 4 sessions per 3 wood loads\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eCO: 346 mg\/m3 - PM: 25 mg\/m3\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eSafety: 150mm sides and back - no protective sheath\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003e330 lbs stones required (10 boxes)\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eUp to 408 lbs with optional stone cage\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eSteam lasts over 30 min after fire out\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003e5mm top \/ 3mm sides stainless steel\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eLarge glass door\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eTop or back flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eMax firewood 11.8\" (300mm)\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003e20.7\"W x 29.5\"D x 34.8\"H - 161 lbs\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eBImSchV certified - CPR certified\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"fl-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"fl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"fl-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9.8 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e282 to 635 cu ft (8-18 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity (primary)\u003c\/td\u003e\n\u003ctd\u003e330 lbs \/ 150 kg (10 boxes) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity with cage\u003c\/td\u003e\n\u003ctd\u003eUp to 408 lbs \/ 185 kg (optional stone cage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax firewood length\u003c\/td\u003e\n\u003ctd\u003e11.8 in (300 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam after fire out\u003c\/td\u003e\n\u003ctd\u003eOver 30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003eLS firebox extension\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox access\u003c\/td\u003e\n\u003ctd\u003eFrom outside the sauna room via wall bushing extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door faces\u003c\/td\u003e\n\u003ctd\u003eAdjacent room - fire view from outside sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall requirement\u003c\/td\u003e\n\u003ctd\u003eNon-combustible wall required for bushing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDual-room effect\u003c\/td\u003e\n\u003ctd\u003eSauna heat inside + fire view and warmth outside\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003eFlow furnace efficiency and emissions\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat retention in sauna\u003c\/td\u003e\n\u003ctd\u003e75% of firewood heat stays in sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSessions per wood load\u003c\/td\u003e\n\u003ctd\u003e4 sessions vs 3 for conventional stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCO emissions\u003c\/td\u003e\n\u003ctd\u003e346 mg\/m3 (vs 1,000+ mg\/m3 in comparable stoves)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParticulate matter\u003c\/td\u003e\n\u003ctd\u003e25 mg\/m3 - lowest in its category\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eBImSchV (German clean combustion) | CPR certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003eSafety distances (combustible materials)\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides and back\u003c\/td\u003e\n\u003ctd\u003e5.9 in (150 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront\u003c\/td\u003e\n\u003ctd\u003e19.7 in (500 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVs conventional stoves\u003c\/td\u003e\n\u003ctd\u003eConventional: 200-500 mm | HIVE Flow: 150 mm sides\/back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective sheath required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e20.7 in (530 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth (with LS extension)\u003c\/td\u003e\n\u003ctd\u003e29.5 in (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e34.8 in (884 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (LS model)\u003c\/td\u003e\n\u003ctd\u003e161 lbs (73 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Flow weight (no LS)\u003c\/td\u003e\n\u003ctd\u003e148 lbs (67 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003eHIVE Flow LS vs HIVE Flow Mini LS comparison\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eFlow LS: 9.8kW | Flow Mini LS: 8.5kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom range\u003c\/td\u003e\n\u003ctd\u003eFlow LS: 282-635 cu ft | Flow Mini LS: 212-494 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003eFlow LS: 330 lbs (10 boxes) | Flow Mini LS: 231 lbs (7 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003eFlow LS: 20.7 in | Flow Mini LS: 17.7 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlow furnace, emissions, clearances\u003c\/td\u003e\n\u003ctd\u003eIdentical - same patent-pending furnace design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications, warranty\u003c\/td\u003e\n\u003ctd\u003eIdentical - BImSchV, CPR, 5-year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop panels\u003c\/td\u003e\n\u003ctd\u003e5 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides\u003c\/td\u003e\n\u003ctd\u003e3 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door\u003c\/td\u003e\n\u003ctd\u003eLarge - faces adjacent room in LS configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh management\u003c\/td\u003e\n\u003ctd\u003eAsh drawer included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCleaning access\u003c\/td\u003e\n\u003ctd\u003e2 cleaning hatches included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-spec-block\"\u003e\n\u003ch4\u003eFlue, certifications, and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"fl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection position\u003c\/td\u003e\n\u003ctd\u003eTop or back - selected during installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned, engineered, and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional cage\u003c\/td\u003e\n\u003ctd\u003eHUUM stone cage - adds 77-88 lbs stones capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional protective cage\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney kits\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling \/ Thru-Wall \/ Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor protection\u003c\/td\u003e\n\u003ctd\u003eHUUM Protective Plate | HUUM Protective Bed LS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"fl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"fl-inc-grid\"\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eHUUM HIVE Flow LS 9.8kW wood-burning sauna stove with LS firebox extension\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eMetal grate\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eHeat resistant glove\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eSplints\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eMetal fixing plates (x2)\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eAsh grate\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eCleaning hatches (x2)\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eAsh drawer\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"fl-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 330 lbs sauna stones (10 boxes, rounded 5-10 cm diameter recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM stone cage (adds 77-88 lbs additional stone capacity); HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM Protective Plate or Protective Bed LS; HUUM Mounting Collar. A licensed chimney professional is recommended for all flue installations. Non-combustible wall required for LS firebox bushing.\u003c\/p\u003e\n\u003chr class=\"fl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Flow LS stands out\u003c\/h3\u003e\n\u003cdiv class=\"fl-feat-grid\"\u003e\n\u003cdiv class=\"fl-feat\"\u003e\n\u003cdiv class=\"fl-feat-title\"\u003eLS exterior loading - session undisturbed, fire managed outside\u003c\/div\u003e\n\u003cp\u003eThe LS firebox extension allows the HIVE Flow's fire to be tended entirely from outside the sauna room. The sauna door stays closed. Heat is not lost to wood loading. Bathers in the sauna are completely undisturbed. The glass door faces the adjacent room, providing the person managing the fire with a direct view of the flames and the ambient warmth of the fire's radiant heat from the firebox face. HUUM notes directly: the LS model allows you to heat the sauna from an adjacent room. For a cabin sauna with a lounge, a sauna building where the stove fire is managed from outdoors, or any layout where exterior loading is operationally preferred, the HIVE Flow LS is the exact configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-feat\"\u003e\n\u003cdiv class=\"fl-feat-title\"\u003e75% heat retention - 4 sessions per 3 wood loads\u003c\/div\u003e\n\u003cp\u003eThe patent-pending Flow furnace keeps 75% of the heat generated from burning wood inside the sauna. HUUM's precise statement of the practical consequence: you can enjoy four sessions with the same amount of wood that would typically provide three sauna sessions. For a sauna that fires regularly across a season of use, this 33% fuel saving adds up meaningfully in wood consumption, cost, and the effort of sourcing and storing firewood. The same Flow furnace design also produces dramatically lower emissions - CO at 346 mg\/m3, particulates at 25 mg\/m3 - as a direct result of the more complete and efficient combustion that the unique airflow pattern achieves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-feat\"\u003e\n\u003cdiv class=\"fl-feat-title\"\u003e330 lbs of stones - over 30 minutes of steam after the fire\u003c\/div\u003e\n\u003cp\u003eAt 330 lbs (150 kg), the HIVE Flow LS holds the largest primary stone capacity in the HUUM HIVE Flow lineup. The large stone mass accumulates substantial thermal energy during the fire and holds it long after the fire dies down. HUUM's own description of the steam performance: full sauna bathing even over 30 minutes after the fire has died. For a sauna session managed from outside via the LS configuration - where the fire is loaded and then left to burn - the stone thermal mass is what sustains the session quality long after the fire itself has burned down. The optional HUUM stone cage adds a further 77-88 lbs of capacity for sessions requiring the maximum stone thermal reserve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-feat\"\u003e\n\u003cdiv class=\"fl-feat-title\"\u003e5.9\" side and back clearances - snug installation possible\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow LS requires just 150mm (5.9\") at the sides and back from combustible materials - the same tight clearances as the HIVE Flow Mini, achieved by the same patent-pending furnace design. HUUM attributes the minimal clearances directly to the Flow furnace: the heater warms up more evenly across its body, preventing localised hot spots that would otherwise require larger standoffs from combustible wall surfaces. The front clearance is 500mm (19.7\"). No protective sheath or shield is required to achieve these clearances. For a sauna room where the stove position is close to wooden bench legs and wall panels, 5.9\" side clearances offer significantly more layout flexibility than conventional stoves.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-feat\"\u003e\n\u003cdiv class=\"fl-feat-title\"\u003eBImSchV and CPR certified - independently verified emissions\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow LS meets the BImSchV Stufe 2 standard - the rigorous German clean combustion regulation - and carries CPR (European Commission) certification. These are independently verified emission and performance values, not manufacturer self-declarations. The CO value of 346 mg\/m3 and PM value of 25 mg\/m3 are confirmed by testing under these standards. HUUM states that the HIVE Flow surpasses all known efficiency and environmental metrics for wood-burning stoves of its class. For buyers who require certified emission compliance for installation approval, or who simply want verified evidence of the stove's environmental performance, these certifications are the documented record.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-feat\"\u003e\n\u003cdiv class=\"fl-feat-title\"\u003eHIVE Flow Series - LS and related configurations\u003c\/div\u003e\n\u003cp\u003eThe H1016012 is the 9.8kW LS (firebox extension) configuration of the HIVE Flow platform. The same Flow furnace is available as: HIVE Flow (9.8kW, standard interior firebox, H1015012), HIVE Flow Mini (8.5kW, standard interior firebox, H1015012 variant), and HIVE Flow Mini LS (8.5kW, LS firebox extension, H1017012). All four share the same patent-pending Flow furnace (75% heat retention, CO 346 mg\/m3, PM 25 mg\/m3, 150mm side and back clearances), 5mm\/3mm stainless steel construction, BImSchV and CPR certifications, and 5-year limited warranty. The HIVE Flow and HIVE Flow LS cover the 282-635 cu ft range at 9.8kW. The HIVE Flow Mini and Mini LS cover the 212-494 cu ft range at 8.5kW. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"fl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"fl-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM HIVE Flow LS H1016012 9.8kW wood-burning sauna stove firebox extension 282-635 cu ft 330 lbs stones 75% heat retention\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-flow-ls-sauna-stove.jpg?v=1781558174\u0026amp;width=800\" class=\"fl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"fl-brand-tag\"\u003eDesigned in Estonia - BImSchV Certified - HIVE Flow Series - LS Firebox Extension\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Flow LS. 9.8kW. 282-635 cu ft. 330 lbs of stones. 75% heat retention. Exterior loading.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Flow LS is the 9.8kW through-wall firebox configuration of the HIVE Flow platform - 330 lbs of stones, patent-pending Flow furnace (75% heat retention, CO 346 mg\/m3, PM 25 mg\/m3, 150mm side and back clearances), large glass door facing the adjacent room, and steam that lasts over 30 minutes after the fire dies. BImSchV and CPR certified. 330 lbs stones (10 boxes) and chimney connection required and sold separately. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"fl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.8kW wood-burning\u003c\/strong\u003e - 282-635 cu ft - LS firebox extension through sauna wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75% heat retention\u003c\/strong\u003e - CO 346 mg\/m3 - PM 25 mg\/m3 - lowest in category\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e330 lbs stones required (10 boxes)\u003c\/strong\u003e - steam lasts over 30 min after fire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.9\" side and back clearances\u003c\/strong\u003e - no protective sheath required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBImSchV + CPR certified\u003c\/strong\u003e - 5-year warranty (excl. elements) - made in Estonia\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"fl-brand-tag\"\u003eHIVE Flow LS vs HIVE Flow Mini LS vs HIVE Wood LS 17 - HUUM exterior-feed stove comparison\u003c\/span\u003e\n\u003ch4\u003eHIVE Flow LS vs HIVE Flow Mini LS vs HIVE Wood LS 17 - choosing the right HUUM exterior-feed stove\u003c\/h4\u003e\n\u003cp\u003eThree HUUM exterior-feed wood-burning stoves serve different room sizes and efficiency priorities. HIVE Flow Mini LS H1017012: 8.5kW, 212-494 cu ft, 231 lbs stones (7 boxes), LS firebox extension, patent-pending Flow furnace (75% heat retention, CO 346 mg\/m3). Right for smaller rooms from 212-494 cu ft where the Flow platform's efficiency and low emissions are the priority alongside exterior loading. HIVE Flow LS H1016012 (this listing): 9.8kW, 282-635 cu ft, 330 lbs stones (10 boxes), LS firebox extension, same Flow furnace. Right when the room is larger (282-635 cu ft) and the additional output and stone mass of the full HIVE Flow are required alongside exterior loading. HIVE Wood LS 17 H1010012: 17kW, 283-565 cu ft, 287 lbs stones (9 boxes), LS firebox extension, HUUM's stone-primary heat philosophy (different furnace approach, 5mm stainless steel flame tamer). Right when higher output (17kW) and the HUUM stone-primary experience are the priorities for a similar room range, with different efficiency and emissions characteristics than the Flow platform. Choose the HIVE Flow LS for the 282-635 cu ft range where 9.8kW Flow furnace efficiency and exterior loading via the LS extension are the right specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM HIVE Flow LS 9.8kW vs HIVE Flow Mini LS 8.5kW vs HIVE Wood LS 17 17kW exterior-feed wood sauna stove comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-hive-flow-sauna-stove-in-use.jpg?v=1781558220\u0026amp;width=800\" class=\"fl-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"fl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"fl-manual\"\u003e\n\u003cdiv class=\"fl-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Flow-Sauna-Stove-IOM.pdf\" class=\"fl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"fl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-manual-item\"\u003e\n\u003ch6\u003eCertificate\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-HIVE-Flow-Sauna-Stove-BImSchV-Certificate.pdf\" class=\"fl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"fl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"fl-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"fl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Flow LS carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of unsuitable sauna stones (decorative stones in particular must not be used as they can break under heat), operating without the required stone load, or chimney-related damage from inadequate maintenance. The LS firebox bushing must pass through a non-combustible wall as specified in the installation manual. A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52358517096730,"sku":"H1016012","price":3221.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-hive-flow-ls-sauna-stove.jpg?v=1781558174"},{"product_id":"huum-hive-wood-13-hive-wood-series-sauna-stove","title":"HUUM HIVE Wood 13 HIVE Wood Series Sauna Stove","description":"\u003c!-- HUUM HIVE Wood 13 - HIVE Wood Series Sauna Stove - H1008012 --\u003e\u003c!-- SKU: H1008012 | HIVE Wood Series | 212-459 cu ft (6-13 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Model: HIVE Wood 13 | 13kW | Stainless steel body and furnace door --\u003e\u003c!-- Stone-primary heat design - minimal metal, heat comes mainly from stones --\u003e\u003c!-- 5mm thick stainless steel flame tamer - exceptionally durable --\u003e\u003c!-- Treated only with natural oils (no paint or chemicals on body) --\u003e\u003c!-- Interior firebox - standard configuration (LS exterior-feed version available separately) --\u003e\u003c!-- 199 lbs \/ 90 kg stones required (6 x 33-lb boxes, 5-10 cm, sold separately) --\u003e\u003c!-- Safety distances: sides 7.5\" (190mm) \/ back 9.5\" (250mm) \/ front 35\" (900mm) --\u003e\u003c!-- Top or back flue connection | 115mm | 6\" adapter required for North America --\u003e\u003c!-- Compatible: HUUM Cage HSTV | HUUM WaterEx | Thru-Ceiling\/Thru-Wall\/Barrel Chimney Kit --\u003e\u003c!-- HUUM Cage wraps stones around chimney for additional stone mass \/ aesthetic --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- Designed and precision-crafted in Estonia by HUUM --\u003e\u003c!-- 5-year limited warranty --\u003e\u003c!-- Documents: Installation and Operation Manual | Warranty --\u003e\n\u003cstyle\u003e\n  .w3 { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .w3-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"w3\"\u003e\n\u003cdiv class=\"w3-desc\"\u003e\n\u003ch2\u003eHUUM HIVE Wood 13 HIVE Wood Series Sauna Stove\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE Wood 13 is a 13kW wood-burning sauna stove for rooms from 212 to 459 cubic feet - HUUM's description positions it precisely: the HIVE Wood has taken the ancient wisdom of building sauna stoves to a new level. The design philosophy behind the HIVE Wood 13 is the same stone-primary principle used across all HUUM heaters: use as little metal as possible so the heat comes mainly from the stones and very little from the metal surfaces. The stone mass delivers the good negative ions associated with traditional sauna bathing; the metal is only the structure. The most sensitive component - the flame tamer - is made from 5mm (0.20 in) thick stainless steel, significantly thicker and more durable than typical flame tamers. The stove body is stainless steel, the furnace door is stainless steel, and the only treatment on the metal surfaces is natural oils - no paint, no coatings, no chemicals. 199 lbs of stones (6 x 33-lb boxes, 5-10 cm, sold separately) fill the open stone cage for long-lasting, consistent heat and excellent steam. The optional HUUM Cage wraps additional stones around the chimney pipe above the stove, adding stone mass and visual continuity. Safety distances from combustible materials: 7.5\" sides, 9.5\" back, 35\" front. Top or back 115mm flue connection. 6\" North American adapter required and sold separately. Pallet delivery. 5-year limited warranty. Designed and precision-crafted in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eStone-primary heat - ancient wisdom, modern precision\u003c\/h4\u003e\n\u003cp\u003eHUUM builds the HIVE Wood 13 from as little metal as possible so that heat comes mainly from the stones. This is the philosophy stated directly on HUUM's own product page and it permeates every design decision in the HIVE Wood platform. The stainless steel frame exists to hold the stone mass in the correct position relative to the fire. The stones absorb the fire's energy and release it as the soft, humid, negative-ion-rich heat that has characterised traditional Finnish sauna bathing for centuries. HUUM's description of the outcome: maximize the good negative ions from the stones, as in traditional saunas, and keep the positive ions from the metal at a minimum. The result is a gentle, long-lasting heat and excellent steam capability - qualities that a heater dominated by hot metal surfaces cannot replicate.\u003c\/p\u003e\n\u003ch4\u003e5mm stainless steel flame tamer and natural oil finish\u003c\/h4\u003e\n\u003cp\u003eThe flame tamer is the component of a wood-burning sauna stove exposed to the most direct, sustained flame contact over years of operation. HUUM addresses this directly in their design brief: the most sensitive component of the wood-fired stove, the flame tamer, is made of 5mm thick stainless steel and is therefore exceptionally durable. At 5mm this is significantly more robust than typical flame tamer construction and is a key long-term durability advantage of the HIVE Wood platform. The stove body is treated only with natural oils - no paint, no synthetic coatings - a deliberate material choice that keeps the finish of the stove in keeping with its philosophy of minimal processing and natural materials. The stainless steel furnace door with large glass provides a clear fire view from inside the sauna room throughout the session.\u003c\/p\u003e\n\u003ch4\u003e199 lbs of stones and the optional HUUM Cage for more\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Wood 13's open stone cage holds 199 lbs (90 kg) of rounded sauna stones (5-10 cm diameter, 6 x 33-lb boxes, sold separately). The large exposed stone surface provides consistent heat distribution and excellent steam production - the design maximizes stone contact with the sauna air and makes every ladle of water count. The optional HUUM Cage accessory (sold separately) mounts on top of the stove and wraps additional stones around the chimney pipe above the stone bed - adding stone mass and extending the visual presence of the stone column upward. Up to three HUUM Cages can be stacked for a dramatic stacked-stone aesthetic. The optional HUUM WaterEx accessory (sold separately) attaches to the chimney pipe to heat bathwater simultaneously with the sauna.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-hook\"\u003e13kW wood-burning sauna stove for rooms from 212 to 459 cubic feet. HIVE Wood 13 - stone-primary heat design: minimal metal, heat comes mainly from stones. 5mm thick stainless steel flame tamer - exceptionally durable. Stainless steel body and furnace door. Treated only with natural oils. Large glass furnace door - fire view inside sauna. No electricity required. 199 lbs stones required (6 x 33-lb boxes, 5-10 cm, sold separately). Safety distances: 7.5\" sides, 9.5\" back, 35\" front (combustible). Top or back flue connection - 115mm - 6\" adapter required for North America (sold separately). Optional HUUM Cage adds stones around chimney. Optional HUUM WaterEx heats bathwater. Pallet delivery - scheduled freight required. 5-year limited warranty. Designed and precision-crafted in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"w3-badges\"\u003e\n\u003cspan class=\"w3-badge\"\u003e13 kW\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003e212 to 459 cu ft\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eHIVE Wood Series - stone-primary heat design\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eMinimal metal - heat comes mainly from stones\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003e5mm stainless steel flame tamer - exceptionally durable\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eStainless steel body and furnace door\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eTreated only with natural oils - no paint or coatings\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eLarge glass furnace door - fire view inside sauna\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eWood-burning - no electricity required\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003e199 lbs stones required (6 x 33-lb boxes, 5-10 cm)\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eSafety: 7.5\" sides, 9.5\" back, 35\" front\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eTop or back flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eOptional HUUM Cage - adds stones around chimney\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eOptional HUUM WaterEx - heats bathwater\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003e5-year limited warranty\u003c\/span\u003e \u003cspan class=\"w3-badge\"\u003eDesigned and precision-crafted in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"w3-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"w3-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"w3-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"w3-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e13 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e212 to 459 cu ft (6-13 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e199 lbs \/ 90 kg (6 x 33-lb boxes, 5-10 cm) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2-4 in \/ 5-10 cm diameter (rounded recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox configuration\u003c\/td\u003e\n\u003ctd\u003eInterior - wood loaded from inside sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat philosophy\u003c\/td\u003e\n\u003ctd\u003eStone-primary - minimal metal mass by design\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-spec-block\"\u003e\n\u003ch4\u003eSafety distances (combustible materials)\u003c\/h4\u003e\n\u003ctable class=\"w3-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides\u003c\/td\u003e\n\u003ctd\u003e7.5 in (190 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack\u003c\/td\u003e\n\u003ctd\u003e9.5 in (250 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront\u003c\/td\u003e\n\u003ctd\u003e35 in (900 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-spec-block\"\u003e\n\u003ch4\u003eFlue and installation\u003c\/h4\u003e\n\u003ctable class=\"w3-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.53 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection position\u003c\/td\u003e\n\u003ctd\u003eTop or back - selected during installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"w3-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"w3-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e17.7 in (450 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e18.11 in (460 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e29.6 in (752 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"w3-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFurnace door\u003c\/td\u003e\n\u003ctd\u003eStainless steel frame with large glass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlame tamer\u003c\/td\u003e\n\u003ctd\u003e5 mm (0.20 in) thick stainless steel - exceptionally durable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurface treatment\u003c\/td\u003e\n\u003ctd\u003eNatural oils only - no paint or synthetic coatings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone cage\u003c\/td\u003e\n\u003ctd\u003eOpen - stones fully exposed for heat and steam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse environment\u003c\/td\u003e\n\u003ctd\u003eInterior sauna - wet area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-spec-block\"\u003e\n\u003ch4\u003eCertifications, warranty, and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"w3-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and precision-crafted in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone cage accessory\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV (wraps stones around chimney)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWater heater accessory\u003c\/td\u003e\n\u003ctd\u003eHUUM WaterEx (chimney-pipe water heater)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-ceiling\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - thru-wall\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Wall Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney - barrel\u003c\/td\u003e\n\u003ctd\u003eHUUM Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"w3-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"w3-inc-grid\"\u003e\n\u003cdiv class=\"w3-inc-item\"\u003eHUUM HIVE Wood 13 13kW wood-burning sauna stove\u003c\/div\u003e\n\u003cdiv class=\"w3-inc-item\"\u003eStainless steel furnace door with large glass\u003c\/div\u003e\n\u003cdiv class=\"w3-inc-item\"\u003e5mm stainless steel flame tamer\u003c\/div\u003e\n\u003cdiv class=\"w3-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"w3-inc-item\"\u003e5-year limited warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 199 lbs sauna stones (6 x 33-lb boxes, rounded 5-10 cm diameter recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM Cage HSTV (adds stones around chimney, up to 3 stackable); HUUM WaterEx (chimney water heater); HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit. A licensed chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003chr class=\"w3-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Wood 13 stands out\u003c\/h3\u003e\n\u003cdiv class=\"w3-feat-grid\"\u003e\n\u003cdiv class=\"w3-feat\"\u003e\n\u003cdiv class=\"w3-feat-title\"\u003eStone-primary heat - good negative ions, minimal metal\u003c\/div\u003e\n\u003cp\u003eHUUM's design philosophy for the HIVE Wood 13 is stated plainly: HUUM heaters are built using very little metal so that the heat comes mainly from the stones and very little from the metal. This maximises the good negative ions released by the stones, as in traditional saunas, and keeps the positive ions from the metal at a minimum. The HIVE Wood 13's open stone cage positions 199 lbs of stones around and above the firebox where they absorb heat from the fire and re-radiate it as the soft, humid, long-lasting heat of traditional Finnish sauna bathing. The frame holds the stones. The stones provide the heat. This is the design intention, and it is visible in every dimension of the stove's construction.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-feat\"\u003e\n\u003cdiv class=\"w3-feat-title\"\u003e5mm flame tamer - the most durable component in the HIVE Wood\u003c\/div\u003e\n\u003cp\u003eHUUM built the HIVE Wood 13's flame tamer from 5mm (0.20 in) thick stainless steel because it is the most sensitive component of the wood-fired stove. At 5mm, this is significantly more robust than the flame tamers found in comparable stoves at this price point, and significantly more durable than the 3mm sides of the stove body. The flame tamer sits directly above the firebox, exposed to sustained high-temperature flame contact across every session of use. A thicker flame tamer lasts longer between replacements, performs more consistently over the stove's service life, and is a direct indicator of the material quality standard applied to the HIVE Wood platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-feat\"\u003e\n\u003cdiv class=\"w3-feat-title\"\u003eNatural oils only - no paint, no chemicals\u003c\/div\u003e\n\u003cp\u003eThe HIVE Wood 13's stainless steel surfaces are treated only with natural oils. There is no paint, no powder coat, no synthetic surface treatment of any kind on the stove body. This is a deliberate material philosophy consistent with the HIVE Wood's broader approach of keeping the materials in the sauna environment as natural as possible. The stainless steel surface - naturally corrosion-resistant and heat-durable - does not need paint for protection. The natural oil treatment maintains the appearance of the stainless steel and is consistent with the material philosophy that extends from the stone-primary heat design to the surface finishing of every component.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-feat\"\u003e\n\u003cdiv class=\"w3-feat-title\"\u003e199 lbs of stones - consistent heat and excellent steam\u003c\/div\u003e\n\u003cp\u003eHUUM's own description of the 199-lb stone capacity: its large number of exposed stones provides long-lasting heat and better steam capability. For a 13kW stove in a 212-459 cu ft room, the stone mass is proportionally generous - the stones accumulate heat throughout the fire and continue releasing it steadily after the fire dies down. The open stone cage design exposes the maximum stone surface area to the sauna air and to the bather's ladle of water - every part of the exposed stone mass can receive water and produce steam. The large glass furnace door allows the bather to watch the fire throughout the session, adding the visual warmth of the flames to the sauna atmosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-feat\"\u003e\n\u003cdiv class=\"w3-feat-title\"\u003eHUUM Cage - add stones around the chimney\u003c\/div\u003e\n\u003cp\u003eThe optional HUUM Cage HSTV (sold separately) mounts on top of the HIVE Wood 13 and wraps additional sauna stones around the chimney pipe extending above the stove. This extends the stone mass upward along the chimney and creates a stacked-stone visual effect above the stove body. Up to three HUUM Cages can be stacked on top of each other for a taller stone column. The chimney heat that would otherwise be lost to the flue passes through the stone-filled cage, transferring additional thermal energy into the stones. The optional HUUM WaterEx accessory clips onto the chimney pipe to heat bathwater simultaneously with the sauna session using the chimney's heat output.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-feat\"\u003e\n\u003cdiv class=\"w3-feat-title\"\u003eHIVE Wood Series - 13kW and 17kW, standard and LS\u003c\/div\u003e\n\u003cp\u003eThe H1008012 is the 13kW standard interior-firebox configuration of the HIVE Wood Series. The same stone-primary design platform is available at 17kW (HIVE Wood 17, H1009012, 283-565 cu ft, 287 lbs stones \/ 9 x 33-lb boxes) and at 17kW with LS through-wall firebox extension (HIVE Wood LS 17, H1010012, 283-565 cu ft, 287 lbs stones \/ 9 x 33-lb boxes, wood loaded from adjacent room, glass door faces adjacent room). All three share the same stone-primary philosophy, 5mm stainless steel flame tamer, natural oil finish, stainless steel body and furnace door, and 5-year warranty. Designed, engineered, and precision-crafted in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"w3-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"w3-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"w3-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-wood-13-wood-burning-sauna-stove-1182034568.png?v=1781559494\u0026amp;width=800\" alt=\"HUUM HIVE Wood 13 H1008012 13kW wood-burning sauna stove stainless steel 212-459 cu ft 199 lbs stones stone-primary heat\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"w3-brand-tag\"\u003eDesigned in Estonia - HIVE Wood Series - Stone-Primary Heat - 5-Year Warranty\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Wood 13. 13kW. 212-459 cu ft. 199 lbs of stones. 5mm flame tamer. Natural oil finish.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company built on the principle that heat should come from stones, not metal. The HIVE Wood 13 is a 13kW stone-primary wood-burning sauna stove: minimal metal construction, 5mm thick stainless steel flame tamer, stainless steel body and furnace door treated only with natural oils, open stone cage for 199 lbs of stones. 199 lbs sauna stones (6 x 33-lb boxes) and a chimney connection are required and sold separately. Optional HUUM Cage and WaterEx accessories available. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"w3-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e13kW wood-burning\u003c\/strong\u003e - 212-459 cu ft - HIVE Wood stone-primary platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5mm stainless steel flame tamer\u003c\/strong\u003e - natural oil finish - no paint or coatings\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e199 lbs stones required (6 x 33-lb boxes)\u003c\/strong\u003e - heat from stones not metal\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSafety distances: 7.5\" sides, 9.5\" back, 35\" front\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e115mm flue - 6\" adapter required\u003c\/strong\u003e - pallet delivery - 5-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"w3-brand-tag\"\u003eHIVE Wood 13 vs HIVE Wood 17 vs HIVE Wood LS 17 - HIVE Wood Series sizing guide\u003c\/span\u003e\n\u003ch4\u003eHIVE Wood 13 vs HIVE Wood 17 vs HIVE Wood LS 17 - choosing the right HIVE Wood\u003c\/h4\u003e\n\u003cp\u003eThree HIVE Wood configurations share the same stone-primary philosophy, 5mm flame tamer, natural oil finish, and 5-year warranty - the difference is output, room range, stone capacity, and firebox access. HIVE Wood 13 H1008012 (this listing): 13kW, 212-459 cu ft, 199 lbs stones (6 x 33-lb boxes), 17.7\"W x 18.11\"D x 29.6\"H, interior firebox. Right for medium home saunas in the 212-459 cu ft range where interior loading is the installation mode. HIVE Wood 17 H1009012: 17kW, 283-565 cu ft, 287 lbs stones (9 x 33-lb boxes), interior firebox. Right when the room is larger than 459 cu ft or when 17kW output and a larger stone mass are needed with interior loading. HIVE Wood LS 17 H1010012: 17kW, 283-565 cu ft, 287 lbs stones (9 x 33-lb boxes), LS firebox extension - wood loaded from an adjacent room or outdoors, glass door faces the adjacent room for a fireplace view. Right when exterior loading convenience, undisturbed sauna sessions, and a dual-room fire experience are the installation priorities. Choose the HIVE Wood 13 for the 212-459 cu ft range with 13kW and interior loading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"w3-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-wood-13-wood-burning-sauna-stove-1182034567.jpg?v=1781559591\u0026amp;width=800\" alt=\"HUUM HIVE Wood 13 13kW vs HIVE Wood 17 17kW vs HIVE Wood LS 17 exterior feed wood sauna stove comparison\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"w3-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"w3-manual\"\u003e\n\u003cdiv class=\"w3-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"w3-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Wood-Sauna-Stove-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"w3-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"w3-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"w3-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Wood 13 carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines in the manual, use of unsuitable sauna stones (decorative stones in particular must not be used as they can break under heat), operating without the required stone load, or chimney-related damage from inadequate maintenance. Removing the stones once per year for inspection, replacing any broken stones or stones with calcium or other deposits, and re-inserting stones carefully are required maintenance tasks. A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52358574145818,"sku":"H1008012","price":2150.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-stove-huum-hive-wood-13-wood-burning-sauna-stove-1182034568.png?v=1781559494"},{"product_id":"huum-hive-flow-wood-burning-sauna-stove-9-8kw","title":"HUUM HIVE Flow Wood-Burning Sauna Stove, 9.8kW","description":"\u003cp\u003e\u003c!-- HUUM HIVE Flow - Wood-Burning Sauna Stove - H1015012 --\u003e\u003c\/p\u003e\n\u003ch2 class=\"product-meta__title heading h3\"\u003eHUUM HIVE Flow Wood Burning Sauna Stove\u003c\/h2\u003e\n\u003cdiv class=\"@app\"\u003e\n\u003cdiv id=\"shopify-block-AVDBwR2VFTVRTRFphd__a85eace0-7976-4319-9804-004cb28d3e5f\" class=\"shopify-block shopify-app-block\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- SKU: H1015012 | HIVE Flow Series | 282-635 cu ft (8-18 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Patent-pending furnace design: 75% of heat stays in sauna --\u003e\u003c!-- Safety distances from combustible materials: 150mm sides and back \/ 500mm front --\u003e\u003c!-- CO emissions: 346 mg\/m3 | PM: 25 mg\/m3 - lowest in category --\u003e\u003c!-- BImSchV certified (German clean combustion) | CPR certified --\u003e\u003c!-- Steam lasts over 30 minutes after fire is out --\u003e\u003c!-- Top or back flue connection | 115mm | 6\" adapter required for North America --\u003e\u003c!-- Max firewood: 11.8\" (300mm) --\u003e\u003c!-- Dimensions: 20.7\"W (530mm) x 26.4\"D (670mm) x 34.8\"H (884mm) --\u003e\u003c!-- Documents: IOM | Warranty | Certificate | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .hv { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .hv-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"hv\"\u003e\n\u003cdiv class=\"hv-desc\"\u003e\n\u003cp\u003eThe HUUM HIVE Flow is a 9.8kW wood-burning sauna stove for rooms from 282 to 635 cubic feet with a patent-pending furnace design that retains 75% of the heat from firewood inside the sauna - significantly more than conventional sauna stoves. The standard HIVE Flow has an interior firebox: the glass door faces into the sauna room, wood is loaded and the fire is managed from inside, and the bather and the fire share the same space throughout the session. This is the right configuration for installations where interior loading is preferred and the focus is on the HIVE Flow's exceptional efficiency and emissions performance rather than exterior loading convenience. CO emissions are just 346 mg\/m3 versus over 1,000 mg\/m3 in comparable stoves. Particulate matter output is 25 mg\/m3 - the lowest in its output category. Safety distances from combustible materials are just 150mm (5.9\") at the sides and back, achieved by the Flow furnace design without any protective sheath. The stove holds 330 lbs (150 kg) of stones (10 boxes, sold separately), with an optional stone cage adding a further 77-88 lbs. Steam lasts over 30 minutes after the fire dies. Top or back 115mm flue connection. Max firewood 11.8\" (300mm). BImSchV and CPR certified. 5-year limited warranty (excluding elements). Designed, engineered, and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eInterior firebox - fire and bather in the same room\u003c\/h4\u003e\n\u003cp\u003eThe standard HIVE Flow keeps the firebox door facing into the sauna room. Wood is loaded by opening the large glass furnace door from inside the sauna, adding wood, and closing it again. The fire is tended from inside the session space. The large glass furnace door enhances the cozy ambiance of the sauna, letting bathers enjoy the mesmerizing flames throughout the session from the bench. For buyers who prefer the traditional Finnish sauna arrangement - where the bather tends the fire, manages the heat, and is fully present with the stove throughout the session - the standard HIVE Flow provides all of the Flow platform's efficiency and emissions advantages in the classic interior-access configuration. For buyers who want to load from an adjacent room, the HIVE Flow LS is the same stove with the firebox extension.\u003c\/p\u003e\n\u003ch4\u003ePatent-pending Flow furnace - 75% heat retention, 4 sessions per 3 wood loads\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow's patent-pending furnace creates a unique airflow pattern that keeps 75% of the heat generated from burning wood inside the sauna rather than letting it escape through the chimney. HUUM's own summary of the practical consequence: you can enjoy four sessions with the same amount of wood that would typically provide three sauna sessions. This 33% improvement in sessions per wood load is the result of more complete, efficient combustion - and the same combustion efficiency that produces the 75% heat retention also produces dramatically lower emissions: CO at 346 mg\/m3 against over 1,000 mg\/m3 in comparable stoves, and particulate matter at 25 mg\/m3 - the lowest measured in its output category. BImSchV (German clean combustion) and CPR certifications confirm these are independently verified values.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stones, 5.9\" side clearances, and over 30 minutes of steam\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow holds 330 lbs (150 kg) of sauna stones in its primary stone compartment. The optional HUUM stone cage adds capacity for a further 77-88 lbs of stones around the chimney pipe above the stove. HUUM's description of the steam performance is direct: the large stone volume allows full sauna bathing even over 30 minutes after the fire has died. For a home sauna where the session naturally extends past the fire's peak, the stone thermal mass sustains quality heat and steam without relighting or adding wood. Safety distances from combustible materials are just 150mm (5.9\") at the sides and back - the same compact clearances as the HIVE Flow LS - no protective sheath required. Rounded sauna stones 5-10 cm in diameter are recommended by HUUM for milder steam.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-hook\"\u003e9.8kW wood-burning sauna stove for rooms from 282 to 635 cubic feet. HIVE Flow - standard interior firebox, glass door faces into sauna room. Patent-pending Flow furnace: 75% heat retention - 4 sessions from 3 loads of wood. CO: 346 mg\/m3 (vs 1,000+ in comparable stoves). PM: 25 mg\/m3 - lowest in category. Safety distances: 150mm (5.9\") sides and back - 500mm (19.7\") front from combustible materials. No protective sheath required. 330 lbs stones required (10 boxes, sold separately). Up to 408 lbs with optional stone cage. Steam lasts over 30 min after fire is out. 5mm top \/ 3mm sides stainless steel. Large glass door. Top or back flue - 115mm. Max firewood 11.8\" (300mm). 6\" adapter required for North America (sold separately). Dimensions: 20.7\"W x 26.4\"D x 34.8\"H. 148 lbs. BImSchV certified - CPR certified. Pallet delivery required. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"hv-badges\"\u003e\n\u003cspan class=\"hv-badge\"\u003e9.8 kW\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003e282 to 635 cu ft\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eHIVE Flow - interior firebox - glass door faces into sauna\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003ePatent-pending Flow furnace - 75% heat retention\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003e4 sessions per 3 wood loads\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eCO: 346 mg\/m3 - PM: 25 mg\/m3 - lowest in category\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eSafety: 150mm sides and back - no protective sheath\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003e330 lbs stones required (10 boxes)\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eUp to 408 lbs with optional stone cage\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eSteam lasts over 30 min after fire out\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003e5mm top \/ 3mm sides stainless steel\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eLarge glass door - fire view inside sauna\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eTop or back flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eMax firewood 11.8\" (300mm)\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003e20.7\"W x 26.4\"D x 34.8\"H - 148 lbs\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eBImSchV certified - CPR certified\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"hv-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"hv-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"hv-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9.8 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e282 to 635 cu ft (8-18 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity (primary)\u003c\/td\u003e\n\u003ctd\u003e330 lbs \/ 150 kg (10 boxes) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity with cage\u003c\/td\u003e\n\u003ctd\u003eUp to 408 lbs \/ 185 kg (optional stone cage)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax firewood length\u003c\/td\u003e\n\u003ctd\u003e11.8 in (300 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam after fire out\u003c\/td\u003e\n\u003ctd\u003eOver 30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox configuration\u003c\/td\u003e\n\u003ctd\u003eInterior - glass door faces into sauna room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003eFlow furnace efficiency and emissions\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat retention in sauna\u003c\/td\u003e\n\u003ctd\u003e75% of firewood heat stays in sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSessions per wood load\u003c\/td\u003e\n\u003ctd\u003e4 sessions vs 3 for conventional stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCO emissions\u003c\/td\u003e\n\u003ctd\u003e346 mg\/m3 (vs 1,000+ mg\/m3 in comparable stoves)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParticulate matter\u003c\/td\u003e\n\u003ctd\u003e25 mg\/m3 - lowest in its category\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFurnace design\u003c\/td\u003e\n\u003ctd\u003ePatent-pending - unique airflow pattern\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eBImSchV (German clean combustion) | CPR certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003eSafety distances (combustible materials)\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides and back\u003c\/td\u003e\n\u003ctd\u003e5.9 in (150 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront\u003c\/td\u003e\n\u003ctd\u003e19.7 in (500 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVs conventional stoves\u003c\/td\u003e\n\u003ctd\u003eConventional: 200-500 mm | HIVE Flow: 150 mm sides\/back\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective sheath required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e20.7 in (530 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth (standard - no LS extension)\u003c\/td\u003e\n\u003ctd\u003e26.4 in (670 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e34.8 in (884 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e148 lbs (67 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003eHIVE Flow vs HIVE Flow LS - dimension comparison\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox direction\u003c\/td\u003e\n\u003ctd\u003eFlow: faces into sauna | Flow LS: faces adjacent room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth (both)\u003c\/td\u003e\n\u003ctd\u003e20.7 in (530 mm) - identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth - HIVE Flow (standard)\u003c\/td\u003e\n\u003ctd\u003e26.4 in (670 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth - HIVE Flow LS\u003c\/td\u003e\n\u003ctd\u003e29.5 in (750 mm) - deeper due to LS wall extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight - HIVE Flow\u003c\/td\u003e\n\u003ctd\u003e148 lbs (67 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight - HIVE Flow LS\u003c\/td\u003e\n\u003ctd\u003e161 lbs (73 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput, stones, furnace, certs\u003c\/td\u003e\n\u003ctd\u003eIdentical across both configurations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop panels\u003c\/td\u003e\n\u003ctd\u003e5 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides\u003c\/td\u003e\n\u003ctd\u003e3 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door\u003c\/td\u003e\n\u003ctd\u003eLarge - faces into sauna room\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh management\u003c\/td\u003e\n\u003ctd\u003eAsh drawer included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCleaning access\u003c\/td\u003e\n\u003ctd\u003e2 cleaning hatches included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse environment\u003c\/td\u003e\n\u003ctd\u003eInterior sauna - wet area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-spec-block\"\u003e\n\u003ch4\u003eFlue, certifications, and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"hv-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection position\u003c\/td\u003e\n\u003ctd\u003eTop or back - selected during installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned, engineered, and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional stone cage\u003c\/td\u003e\n\u003ctd\u003eHUUM stone cage - adds 77-88 lbs stone capacity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional safety cage\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney kits\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling \/ Thru-Wall \/ Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor protection\u003c\/td\u003e\n\u003ctd\u003eHUUM Protective Plate | HUUM Protective Bed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hv-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"hv-inc-grid\"\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eHUUM HIVE Flow 9.8kW wood-burning sauna stove\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eMetal grate\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eHeat resistant glove\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eSplints\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eMetal fixing plates (x2)\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eAsh grate\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eCleaning hatches (x2)\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eAsh drawer\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"hv-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 330 lbs sauna stones (10 boxes, rounded 5-10 cm diameter recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM stone cage (adds 77-88 lbs additional stone capacity); HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM Protective Plate or Protective Bed. A licensed chimney professional is recommended for all flue installations.\u003c\/p\u003e\n\u003chr class=\"hv-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Flow stands out\u003c\/h3\u003e\n\u003cdiv class=\"hv-feat-grid\"\u003e\n\u003cdiv class=\"hv-feat\"\u003e\n\u003cdiv class=\"hv-feat-title\"\u003ePatent-pending Flow furnace - 75% heat retention\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow's patent-pending furnace creates a unique airflow pattern that keeps 75% of the heat generated from burning wood inside the sauna. HUUM's precise statement: you can enjoy four sessions with the same amount of wood that would typically provide three sauna sessions. This 33% improvement in sessions per unit of firewood is not a marginal gain - it is the direct result of more complete and efficient combustion inside the Flow furnace. The same efficiency that drives the 75% heat retention also produces dramatically lower emissions, tighter safety clearances, and the long-lasting steam that continues over 30 minutes after the fire dies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-feat\"\u003e\n\u003cdiv class=\"hv-feat-title\"\u003eCO at 346 mg\/m3 - independently verified, lowest in category\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow's CO emissions of 346 mg\/m3 compare to over 1,000 mg\/m3 in comparable stoves. Particulate matter output of 25 mg\/m3 is the lowest in its output category. Both values are independently verified under BImSchV (the German clean combustion standard) and CPR (European Commission) certification - not manufacturer self-declarations. HUUM states that the HIVE Flow surpasses all known efficiency and environmental metrics for wood-burning stoves of its class. For buyers requiring certified emission compliance for installation approval, or for those who want documented evidence of environmental performance, these certifications are the record.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-feat\"\u003e\n\u003cdiv class=\"hv-feat-title\"\u003e330 lbs of stones - over 30 minutes of steam after the fire\u003c\/div\u003e\n\u003cp\u003eAt 330 lbs (150 kg), the HIVE Flow primary stone capacity is among the largest for a stove of this output class. The stone mass accumulates heat throughout the fire's burn and holds it long after the fire dies. HUUM's description of the result: full sauna bathing even over 30 minutes after the fire has died. The optional HUUM stone cage extends capacity by a further 77-88 lbs for sessions requiring the maximum thermal reserve. Rounded sauna stones 5-10 cm in diameter are recommended by HUUM - they create less dust and allow better air circulation through the stone mass than angular stones.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-feat\"\u003e\n\u003cdiv class=\"hv-feat-title\"\u003e5.9\" side and back clearances - snug installation without sheath\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow requires just 150mm (5.9\") at the sides and back from combustible materials - achieved by the Flow furnace design, not by a protective sheath. The front clearance is 500mm (19.7\"). HUUM explains the mechanism directly: the heater warms up more evenly, allowing for snug installation. For a sauna room in the 282-635 cu ft range where bench placement close to the stove is important, 5.9\" side and back clearances give meaningfully more layout flexibility than conventional stoves requiring 200-500mm. No additional accessories are required to achieve these clearances - the stove as delivered meets the 150mm specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-feat\"\u003e\n\u003cdiv class=\"hv-feat-title\"\u003eLarge glass door - fire view from the bench\u003c\/div\u003e\n\u003cp\u003eIn the standard HIVE Flow interior configuration, the large glass furnace door faces into the sauna room. The fire is visible from the benches throughout the session - the warm, moving light of the fire adds the ambient character of a live wood fire to the sauna environment. For bathers who tend their own fire and prefer to be present with the stove and the fire throughout the session, the interior glass door is central to the experience. HUUM describes this directly: the large glass furnace door enhances the cozy ambiance of your sauna, letting you enjoy the mesmerizing flames. The two cleaning hatches provide easy maintenance access without disassembling the stove.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-feat\"\u003e\n\u003cdiv class=\"hv-feat-title\"\u003eHIVE Flow Series - Flow, Flow LS, Flow Mini, and Flow Mini LS\u003c\/div\u003e\n\u003cp\u003eThe H1015012 is the 9.8kW standard interior-firebox configuration of the HIVE Flow. The same 9.8kW Flow furnace is also available as the HIVE Flow LS (H1016012, same 9.8kW and 330-lb stone capacity, firebox through-wall extension, glass door faces adjacent room, 29.5\"D depth, 161 lbs). The HIVE Flow Mini (H1015012 variant) and HIVE Flow Mini LS (H1017012) cover the smaller 212-494 cu ft range at 8.5kW with 231 lbs of stones. All four configurations share the same patent-pending Flow furnace, BImSchV and CPR certifications, and 5-year limited warranty. Choose the HIVE Flow (this listing) for 282-635 cu ft with interior loading. Choose the HIVE Flow LS when exterior loading is the priority. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"hv-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"hv-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"hv-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-flow-wood-burning-sauna-stove-1182034942.png?v=1781600499\u0026amp;width=800\" alt=\"HUUM HIVE Flow H1015012 9.8kW wood-burning sauna stove interior firebox 282-635 cu ft 330 lbs stones 75% heat retention\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hv-brand-tag\"\u003eDesigned in Estonia - BImSchV Certified - HIVE Flow Series - Interior Firebox\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Flow. 9.8kW. 282-635 cu ft. 75% heat retention. CO 346 mg\/m3. Interior firebox.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Flow is a 9.8kW wood-burning stove with a patent-pending furnace that retains 75% of firewood heat inside the sauna, produces CO of 346 mg\/m3 (vs 1,000+ in comparable stoves), achieves 5.9\" safety distances from combustible materials without a sheath, and delivers steam for over 30 minutes after the fire dies. Standard interior firebox - glass door faces into the sauna. BImSchV and CPR certified. 330 lbs stones (10 boxes) and chimney connection required and sold separately. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"hv-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e9.8kW wood-burning\u003c\/strong\u003e - 282-635 cu ft - interior firebox - glass door faces into sauna\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75% heat retention\u003c\/strong\u003e - CO 346 mg\/m3 - PM 25 mg\/m3 - BImSchV certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e330 lbs stones required (10 boxes)\u003c\/strong\u003e - steam lasts over 30 min after fire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.9\" side and back clearances\u003c\/strong\u003e - no protective sheath required\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-year warranty (excl. elements)\u003c\/strong\u003e - 148 lbs - pallet delivery - made in Estonia\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"hv-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"hv-brand-tag\"\u003eHIVE Flow vs HIVE Flow LS vs HIVE Flow Mini - Flow platform selection guide\u003c\/span\u003e\n\u003ch4\u003eHIVE Flow vs HIVE Flow LS vs HIVE Flow Mini - choosing the right HIVE Flow configuration\u003c\/h4\u003e\n\u003cp\u003eFour configurations carry the HIVE Flow platform across two room sizes and two firebox directions. HIVE Flow Mini H1015012 variant: 8.5kW, 212-494 cu ft, 231 lbs stones (7 boxes), interior firebox. HIVE Flow Mini LS H1017012: 8.5kW, 212-494 cu ft, 231 lbs stones (7 boxes), LS firebox extension. Both Mini variants cover smaller rooms at lower output and stone capacity. HIVE Flow H1015012 (this listing): 9.8kW, 282-635 cu ft, 330 lbs stones (10 boxes), interior firebox, 26.4\"D depth, 148 lbs. Right for the 282-635 cu ft range where interior loading is preferred and the full Flow efficiency and stone capacity are needed. HIVE Flow LS H1016012: 9.8kW, 282-635 cu ft, 330 lbs stones (10 boxes), LS firebox extension through sauna wall, glass door faces adjacent room, 29.5\"D depth, 161 lbs. Right when the same 9.8kW Flow output and 330-lb stone capacity are needed alongside exterior loading and a fireplace view in an adjacent room. All four share the patent-pending Flow furnace (75% heat retention, CO 346 mg\/m3, PM 25 mg\/m3, 150mm side and back clearances), BImSchV and CPR certifications, and 5-year limited warranty. Choose the HIVE Flow for the 282-635 cu ft range with interior loading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"hv-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-flow-wood-burning-sauna-stove-1182034940.jpg?v=1781600603\u0026amp;width=800\" alt=\"HUUM HIVE Flow interior vs HIVE Flow LS exterior vs HIVE Flow Mini smaller room - HIVE Flow platform comparison\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"hv-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"hv-manual\"\u003e\n\u003cdiv class=\"hv-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"hv-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Flow-Sauna-Stove-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"hv-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-manual-item\"\u003e\n\u003ch6\u003eCertificate\u003c\/h6\u003e\n\u003ca class=\"hv-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-HIVE-Flow-Sauna-Stove-BImSchV-Certificate.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"hv-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"hv-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"hv-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Flow carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of unsuitable sauna stones (decorative stones must not be used as they can break under heat), operating without the required stone load, or chimney-related damage from inadequate maintenance. A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52360618246426,"sku":"H1015012","price":3129.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-stove-huum-hive-flow-wood-burning-sauna-stove-1182034942.png?v=1781600499"},{"product_id":"huum-hive-flow-mini-ls-wood-burning-sauna-stove-w-firebox-extension-8-5kw","title":"HUUM HIVE Flow Mini LS Wood-Burning Sauna Stove w\/ Firebox Extension, 8.5kW","description":"\u003c!-- HUUM HIVE Flow Mini LS - Wood-Burning Sauna Stove with Firebox Extension - H1018012 --\u003e\u003c!-- SKU: H1018012 | HIVE Flow Series | 212-494 cu ft (6-14 m3) | Floor-mounted wood-burning --\u003e\u003c!-- Model: HIVE FLOW MINI LS | 8.5kW | Stainless steel (5mm top \/ 3mm sides) --\u003e\u003c!-- LS = firebox extension through sauna wall | wood loaded from adjacent room or outdoors --\u003e\u003c!-- Glass door faces adjacent room | bathers inside sauna undisturbed --\u003e\u003c!-- Patent-pending furnace design: 75% of heat stays in sauna --\u003e\u003c!-- Safety distances: sides 5.9\" (150mm) \/ back 29.5\" (750mm) \/ front 19.7\" (500mm) --\u003e\u003c!-- CO emissions: 346 mg\/m3 | PM: 25 mg\/m3 - lowest in category --\u003e\u003c!-- BImSchV certified | CPR certified --\u003e\u003c!-- Steam lasts over 30 minutes after fire is out --\u003e\u003c!-- 231 lbs \/ 105 kg stones required (7 boxes, sold separately) --\u003e\u003c!-- Dimensions: 17.7\"W (450mm) x 26.5\"D (674mm) x 34.8\"H (884mm) --\u003e\u003c!-- Weight: 130 lbs - deeper than standard HIVE Flow Mini's 21.1\"D --\u003e\u003c!-- Top or back flue connection | 115mm | 6\" adapter required for North America --\u003e\u003c!-- Max firewood: 11.8\" (300mm) --\u003e\u003c!-- Includes: metal grate, heat resistant glove, splints, fixing plates x2, ash grate, cleaning hatches x2, ash drawer --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- BImSchV certified | CPR certified | Designed and made in Estonia by HUUM --\u003e\u003c!-- 5-year limited warranty (excluding elements) --\u003e\u003c!-- Documents: IOM | Warranty | Certificate | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .ml { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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}\n    .ml-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"ml\"\u003e\n\u003cdiv class=\"ml-desc\"\u003e\n\u003ch2\u003eHUUM HIVE Flow Mini LS Wood-Burning Sauna Stove w\/ Firebox Extension, 8.5kW\u003c\/h2\u003e\n\u003cp\u003eThe HUUM HIVE Flow Mini LS is an 8.5kW wood-burning sauna stove for rooms from 212 to 494 cubic feet - the compact, exterior-loading configuration of the HIVE Flow Mini platform. LS identifies the through-wall firebox extension: the stove body and 231-lb stone cage sit inside the sauna, the firebox extends through the sauna wall, and the glass door faces the adjacent room or exterior. Wood is loaded and the fire is tended from outside the sauna at all times. Bathers inside enjoy 8.5kW of heat and soft, long-lasting steam entirely undisturbed. The HIVE Flow Mini LS is the most compact exterior-feed configuration in the HUUM HIVE Flow lineup - 17.7\" wide, 26.5\" deep (including the LS wall extension), and 130 lbs. The same patent-pending Flow furnace that powers the standard HIVE Flow Mini delivers 75% heat retention, CO emissions of just 346 mg\/m3 (versus over 1,000 mg\/m3 in comparable stoves), particulate matter of 25 mg\/m3 (the lowest in its category), and safety distances of just 5.9\" (150mm) at the sides from combustible materials. Steam lasts over 30 minutes after the fire dies. BImSchV and CPR certified. 5-year limited warranty (excluding elements). Designed, engineered, and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eLS firebox extension - compact exterior loading for small saunas\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow Mini LS is HUUM's most compact exterior-feed wood-burning stove. At 17.7\" wide - the same body width as the standard HIVE Flow Mini - it is narrower than the HIVE Flow LS (20.7\") and brings through-wall firebox loading to sauna installations where a smaller stove footprint and a smaller room range (212-494 cu ft) are the specification. The firebox extension passes through the sauna wall so wood is added and the fire is managed entirely from outside. The glass door faces the adjacent room, providing the person tending the fire a view of the flames while the sauna bathers inside are completely undisturbed. HUUM's description of the LS experience applies directly here: the extended firebox allows you to heat the sauna from an adjacent room. The large glass furnace door enhances the cozy ambiance of the adjacent space, letting you enjoy the mesmerizing flames while the sauna warms.\u003c\/p\u003e\n\u003ch4\u003e75% heat retention, CO 346 mg\/m3, 5.9\" side clearances\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow Mini LS shares the same patent-pending furnace design as the standard HIVE Flow Mini and the HIVE Flow LS - the three headline performance figures are identical across all Flow platform configurations. 75% of the heat from firewood stays in the sauna rather than escaping through the chimney - equivalent to four sessions from the wood that typically gives three. CO emissions of 346 mg\/m3 compare to over 1,000 mg\/m3 in comparable stoves. Particulate matter output of 25 mg\/m3 is the lowest in its output category. Safety distances from combustible materials are just 5.9\" (150mm) at the sides, achieved by the Flow furnace design without requiring any protective sheath. BImSchV (German clean combustion) and CPR certification confirm all emission and performance values are independently verified.\u003c\/p\u003e\n\u003ch4\u003e231 lbs of stones - over 30 minutes of steam after the fire\u003c\/h4\u003e\n\u003cp\u003eThe HIVE Flow Mini LS holds 231 lbs (105 kg) of sauna stones in its primary stone cavity - the same capacity as the standard HIVE Flow Mini. The large stone mass accumulates heat thoroughly during the fire and sustains heat and steam well after the fire dies: HUUM describes the steam as lasting over 30 minutes after the fire goes out. For a sauna where the fire is loaded from outside via the LS extension and then allowed to burn through naturally, the stone thermal mass is what sustains the session without requiring attention from inside. Max firewood length is 11.8\" (300mm). Rounded sauna stones 5-10 cm in diameter are recommended by HUUM for milder steam and better air circulation through the stone bed. 5mm top panels and 3mm sides in stainless steel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-hook\"\u003e8.5kW wood-burning sauna stove with firebox extension for rooms from 212 to 494 cubic feet. HIVE Flow Mini LS - HUUM's most compact exterior-feed Flow stove. Firebox extends through sauna wall. Wood loaded from adjacent room or outdoors. Glass door faces adjacent room. Bathers inside sauna undisturbed. Patent-pending Flow furnace: 75% heat retention - 4 sessions from 3 loads of wood. CO: 346 mg\/m3 (vs 1,000+ in comparable stoves). PM: 25 mg\/m3 - lowest in category. Safety distances: 5.9\" sides (150mm) from combustible materials. No protective sheath required. 231 lbs stones required (7 boxes, sold separately). Steam lasts over 30 min after fire is out. 5mm top \/ 3mm sides stainless steel. Large glass door. Top or back flue - 115mm. Max firewood 11.8\" (300mm). 6\" adapter required for North America (sold separately). Dimensions: 17.7\"W x 26.5\"D x 34.8\"H. 130 lbs. BImSchV certified - CPR certified. Pallet delivery required. 5-year limited warranty (excl. elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"ml-badges\"\u003e\n\u003cspan class=\"ml-badge\"\u003e8.5 kW\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003e212 to 494 cu ft\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eHIVE Flow Mini LS - most compact exterior-feed Flow stove\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eLS firebox extension through sauna wall\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eWood loaded from adjacent room or outdoors\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eGlass door faces adjacent room\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003e75% heat retention - 4 sessions per 3 wood loads\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eCO: 346 mg\/m3 - PM: 25 mg\/m3 - lowest in category\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eSafety: 5.9\" sides - no protective sheath required\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003e231 lbs stones required (7 boxes)\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eSteam lasts over 30 min after fire out\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003e5mm top \/ 3mm sides stainless steel\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eLarge glass door faces adjacent room\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eTop or back flue - 115mm - 6\" adapter required\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eMax firewood 11.8\" (300mm)\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003e17.7\"W x 26.5\"D x 34.8\"H - 130 lbs\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eBImSchV certified - CPR certified\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"ml-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"ml-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"ml-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e8.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eWood - no electricity required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e212 to 494 cu ft (6-14 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e231 lbs \/ 105 kg (7 boxes) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax firewood length\u003c\/td\u003e\n\u003ctd\u003e11.8 in (300 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteam after fire out\u003c\/td\u003e\n\u003ctd\u003eOver 30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox configuration\u003c\/td\u003e\n\u003ctd\u003eLS - extends through sauna wall - exterior loading\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003eLS firebox extension\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox access\u003c\/td\u003e\n\u003ctd\u003eFrom outside the sauna room via wall extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door faces\u003c\/td\u003e\n\u003ctd\u003eAdjacent room or exterior\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWall requirement\u003c\/td\u003e\n\u003ctd\u003eNon-combustible wall required for bushing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDual-room effect\u003c\/td\u003e\n\u003ctd\u003eSauna heat inside + fire view and warmth outside\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional depth vs standard Mini\u003c\/td\u003e\n\u003ctd\u003e+5.4 in (137 mm) due to LS extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003eFlow furnace efficiency and emissions\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeat retention in sauna\u003c\/td\u003e\n\u003ctd\u003e75% of firewood heat stays in sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSessions per wood load\u003c\/td\u003e\n\u003ctd\u003e4 sessions vs 3 for conventional stoves\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCO emissions\u003c\/td\u003e\n\u003ctd\u003e346 mg\/m3 (vs 1,000+ mg\/m3 in comparable stoves)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParticulate matter\u003c\/td\u003e\n\u003ctd\u003e25 mg\/m3 - lowest in its category\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eBImSchV (German clean combustion) | CPR certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e17.7 in (450 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth (with LS extension)\u003c\/td\u003e\n\u003ctd\u003e26.5 in (674 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e34.8 in (884 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e130 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandard Mini depth (no LS)\u003c\/td\u003e\n\u003ctd\u003e21.1 in (537 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdditional depth vs standard Mini\u003c\/td\u003e\n\u003ctd\u003e+5.4 in (137 mm) due to LS extension\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003eSafety distances (combustible materials)\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides (A)\u003c\/td\u003e\n\u003ctd\u003e5.9 in (150 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront (B)\u003c\/td\u003e\n\u003ctd\u003e19.7 in (500 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack (C)\u003c\/td\u003e\n\u003ctd\u003e29.5 in (750 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective sheath required\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTop panels\u003c\/td\u003e\n\u003ctd\u003e5 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides\u003c\/td\u003e\n\u003ctd\u003e3 mm thick stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGlass door\u003c\/td\u003e\n\u003ctd\u003eLarge - faces adjacent room in LS configuration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAsh management\u003c\/td\u003e\n\u003ctd\u003eAsh drawer included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCleaning access\u003c\/td\u003e\n\u003ctd\u003e2 cleaning hatches included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, LS bushing through non-combustible wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-spec-block\"\u003e\n\u003ch4\u003eFlue, certifications, and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"ml-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection diameter\u003c\/td\u003e\n\u003ctd\u003e115mm (4.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue connection position\u003c\/td\u003e\n\u003ctd\u003eTop or back - selected during installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003e6\" (155mm) adapter required - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned, engineered, and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChimney kits\u003c\/td\u003e\n\u003ctd\u003eHUUM Thru-Ceiling \/ Thru-Wall \/ Barrel Chimney Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloor protection\u003c\/td\u003e\n\u003ctd\u003eHUUM Protective Plate | HUUM Protective Bed LS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety cage\u003c\/td\u003e\n\u003ctd\u003eHUUM Cage HSTV\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"ml-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"ml-inc-grid\"\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eHUUM HIVE Flow Mini LS 8.5kW wood-burning sauna stove with LS firebox extension\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eMetal grate\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eHeat resistant glove\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eSplints\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eMetal fixing plates (x2)\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eAsh grate\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eCleaning hatches (x2)\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eAsh drawer\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"ml-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 231 lbs sauna stones (7 boxes, rounded 5-10 cm diameter recommended); 6\" North American flue adapter; chimney connection. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM Cage HSTV; HUUM Thru-Ceiling, Thru-Wall, or Barrel Chimney Kit; HUUM Protective Plate or Protective Bed LS. A licensed chimney professional is recommended for all flue installations. Non-combustible wall required for LS firebox bushing passage.\u003c\/p\u003e\n\u003chr class=\"ml-divider\"\u003e\n\u003ch3\u003eWhy the HUUM HIVE Flow Mini LS stands out\u003c\/h3\u003e\n\u003cdiv class=\"ml-feat-grid\"\u003e\n\u003cdiv class=\"ml-feat\"\u003e\n\u003cdiv class=\"ml-feat-title\"\u003eMost compact exterior-feed Flow stove - 17.7\" wide\u003c\/div\u003e\n\u003cp\u003eAt 17.7\" (450mm) wide, the HIVE Flow Mini LS is the most compact exterior-feed stove in the HUUM HIVE Flow lineup. The HIVE Flow LS - the larger 9.8kW exterior-feed configuration - is 20.7\" wide. The HIVE Flow Mini LS brings the through-wall firebox loading to installations where a narrower stove body is required: smaller sauna rooms, tighter wall openings, or layouts where the 3-inch width difference between the Mini LS and the full LS matters. For a small cabin sauna in the 212-494 cu ft range where both exterior loading and a compact installation footprint are priorities, the HIVE Flow Mini LS is the purpose-built configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-feat\"\u003e\n\u003cdiv class=\"ml-feat-title\"\u003eLS exterior loading - session undisturbed throughout\u003c\/div\u003e\n\u003cp\u003eWood loaded from outside the sauna room means the firebox can be tended without opening the sauna door at any point in the session. No heat loss, no draft, no intrusion. The sauna door stays closed from the moment the session starts to the moment it ends. The glass door faces the adjacent room, giving the person managing the fire a view of the flames and the ambient warmth of the firebox radiant heat. HUUM describes this directly: the extended firebox allows you to heat the sauna from an adjacent room. For a cabin sauna with an adjoining changing room, porch, or outdoor area where fire tending from outside is operationally preferred, the HIVE Flow Mini LS is the exact configuration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-feat\"\u003e\n\u003cdiv class=\"ml-feat-title\"\u003e75% heat retention - 4 sessions from 3 loads of wood\u003c\/div\u003e\n\u003cp\u003eThe patent-pending Flow furnace keeps 75% of the heat generated from burning wood inside the sauna. HUUM's statement of the practical consequence: you can enjoy four sessions with the same amount of wood that would typically provide three sauna sessions. For a sauna fired from outside via the LS extension - where the fire is loaded and left to burn without intervention - the Flow furnace's efficiency means less wood is needed per session, less ash is produced per unit of heat delivered, and the full session runs longer from a given wood load. The same complete combustion that drives the 75% heat retention also produces CO at 346 mg\/m3 and particulates at 25 mg\/m3.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-feat\"\u003e\n\u003cdiv class=\"ml-feat-title\"\u003e231 lbs of stones - steam over 30 minutes after the fire\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow Mini LS holds 231 lbs (105 kg) of sauna stones. The large stone mass accumulates heat from the fire and holds it well after the fire goes out. HUUM's description: the large stone volume allows full sauna bathing even over 30 minutes after the fire has died. For a sauna where the fire is managed externally via the LS extension and burns through naturally without reloading, the stone thermal reservoir is what carries the session. Rounded 5-10 cm diameter stones are recommended by HUUM for milder steam. The two cleaning hatches provide easy interior access for maintenance without disassembling the stove.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-feat\"\u003e\n\u003cdiv class=\"ml-feat-title\"\u003e5.9\" side clearances - compact installation, no sheath needed\u003c\/div\u003e\n\u003cp\u003eThe HIVE Flow Mini LS requires just 5.9\" (150mm) at the sides from combustible materials - the same compact clearances as every Flow Series configuration. No protective sheath is required to achieve these distances; they are a result of the Flow furnace design itself, which HUUM explains produces more even heating across the stove body rather than localised hot spots. Front clearance is 19.7\" (500mm) and back clearance is 29.5\" (750mm). For a small sauna room in the 212-494 cu ft range where bench placement relative to the stove is important, 5.9\" side clearances give meaningfully more layout flexibility than the 7.5\" or larger clearances required by conventional stoves in this class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-feat\"\u003e\n\u003cdiv class=\"ml-feat-title\"\u003eHIVE Flow Series - Mini LS and all four configurations\u003c\/div\u003e\n\u003cp\u003eThe H1018012 is the 8.5kW LS (exterior-feed) configuration of the HIVE Flow Mini platform. The complete HIVE Flow Series spans four configurations: HIVE Flow Mini H1017012 (8.5kW, 212-494 cu ft, interior firebox, 21.1\"D, same Flow furnace); HIVE Flow Mini LS H1018012 (this listing, 8.5kW, 212-494 cu ft, LS firebox extension, 26.5\"D, 130 lbs); HIVE Flow H1015012 (9.8kW, 282-635 cu ft, interior firebox, 26.4\"D, 148 lbs); HIVE Flow LS H1016012 (9.8kW, 282-635 cu ft, LS firebox extension, 29.5\"D, 161 lbs). All four share the patent-pending Flow furnace, 75% heat retention, CO 346 mg\/m3, PM 25 mg\/m3, 150mm side clearances, BImSchV and CPR certifications, and 5-year limited warranty. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"ml-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"ml-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"ml-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-flow-mini-ls-sauna-stove-with-firebox-extension-1182034884.jpg?v=1781629193\u0026amp;width=800\" alt=\"HUUM HIVE Flow Mini LS H1018012 8.5kW wood-burning sauna stove firebox extension 212-494 cu ft 231 lbs stones 75% heat retention\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"ml-brand-tag\"\u003eDesigned in Estonia - BImSchV Certified - HIVE Flow Series - Compact LS\u003c\/span\u003e\n\u003ch4\u003eHUUM HIVE Flow Mini LS. 8.5kW. 212-494 cu ft. Exterior loading. 75% heat retention. 5.9\" clearances.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The HIVE Flow Mini LS is the compact exterior-feed configuration of the 8.5kW HIVE Flow Mini platform - LS firebox extends through the sauna wall, wood loaded from outside, glass door faces adjacent room, bathers inside undisturbed. Patent-pending Flow furnace: 75% heat retention, CO 346 mg\/m3, PM 25 mg\/m3, 5.9\" side clearances without a sheath. 231 lbs stones (7 boxes) and chimney required and sold separately. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"ml-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e8.5kW wood-burning\u003c\/strong\u003e - 212-494 cu ft - LS firebox extension through sauna wall\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75% heat retention\u003c\/strong\u003e - CO 346 mg\/m3 - PM 25 mg\/m3 - BImSchV certified\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e231 lbs stones required (7 boxes)\u003c\/strong\u003e - steam lasts over 30 min after fire\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5.9\" side clearances\u003c\/strong\u003e - 17.7\"W - most compact exterior-feed Flow stove\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-year warranty (excl. elements)\u003c\/strong\u003e - 130 lbs - pallet delivery - made in Estonia\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"ml-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"ml-brand-tag\"\u003eHIVE Flow Mini LS vs HIVE Flow Mini vs HIVE Flow LS - choosing the right Flow config\u003c\/span\u003e\n\u003ch4\u003eHIVE Flow Mini LS vs HIVE Flow Mini vs HIVE Flow LS - exterior vs interior, small vs large room\u003c\/h4\u003e\n\u003cp\u003eFour HIVE Flow configurations serve two room sizes and two firebox directions. HIVE Flow Mini H1017012: 8.5kW, 212-494 cu ft, interior firebox, 21.1\"D depth, glass door faces into sauna. Right when interior loading is acceptable for the 212-494 cu ft range. HIVE Flow Mini LS H1018012 (this listing): 8.5kW, 212-494 cu ft, LS firebox extension, 26.5\"D, 130 lbs, glass door faces adjacent room. Right when exterior loading is the priority for the 212-494 cu ft range and the compact 17.7\"-wide footprint is needed. HIVE Flow H1015012: 9.8kW, 282-635 cu ft, interior firebox, 26.4\"D, 148 lbs. Right when the room is larger (up to 635 cu ft) and interior loading is acceptable. HIVE Flow LS H1016012: 9.8kW, 282-635 cu ft, LS firebox extension, 20.7\"W body, 29.5\"D, 161 lbs. Right when the larger room range and exterior loading are both required. The HIVE Flow Mini LS is the smallest and lightest exterior-feed option in the HIVE Flow Series. All four share the patent-pending Flow furnace, 75% heat retention, CO 346 mg\/m3, PM 25 mg\/m3, 5.9\" side clearances, BImSchV and CPR certifications, and 5-year limited warranty.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"ml-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-stove-huum-hive-flow-mini-ls-sauna-stove-with-firebox-extension-1182034885.jpg?v=1781629315\u0026amp;width=800\" alt=\"HUUM HIVE Flow Mini LS compact exterior vs HIVE Flow Mini interior vs HIVE Flow LS larger room exterior comparison\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"ml-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"ml-manual\"\u003e\n\u003cdiv class=\"ml-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"ml-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-HIVE-Flow-Sauna-Stove-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"ml-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-manual-item\"\u003e\n\u003ch6\u003eCertificate\u003c\/h6\u003e\n\u003ca class=\"ml-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-HIVE-Flow-Mini-Sauna-Stove-BImSchV-Certificate.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"ml-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"ml-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"ml-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM HIVE Flow Mini LS carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of unsuitable sauna stones (decorative stones must not be used as they can break under heat), operating without the required stone load, damage from inadequate chimney maintenance, or improper wall penetration preparation for the LS firebox bushing (non-combustible wall required). A licensed chimney professional is recommended for all flue installation and regular chimney sweep maintenance. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52361958031642,"sku":"H1018012","price":3008.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-stove-huum-hive-flow-mini-ls-sauna-stove-with-firebox-extension-1182034884.jpg?v=1781629193"},{"product_id":"huum-steel-6-steel-series-6kw-sauna-heater","title":"HUUM STEEL 6 STEEL Series 6kW Sauna Heater","description":"\u003c!-- HUUM STEEL 6 - STEEL Series Electric Sauna Heater - H1006012 --\u003e\u003c!-- SKU: H1006012 | STEEL Series | 212-353 cu ft | Floor-mounted electric --\u003e\u003c!-- Model: STEEL 6.0 | 6kW | Stainless steel slim pillar design --\u003e\u003c!-- Safety distances: just 2\" (5 cm) from walls - smallest in the HUUM lineup --\u003e\u003c!-- Internal air duct increases heating speed by up to 25% --\u003e\u003c!-- 330 lbs stones (10 boxes, 3-5 cm rounded olivine - smaller than HIVE Wood) --\u003e\u003c!-- UKU Local or UKU Wi-Fi controller required - sold separately --\u003e\u003c!-- UKU Extension Box NOT required for 6kW (only needed for 10.5kW+) --\u003e\u003c!-- Optional: Reflect S reflector panel - can halve safety distances further --\u003e\u003c!-- Optional: STEEL safety railing (light wood profiles) | embedding flanges --\u003e\u003c!-- 240V\/1PH | 30A circuit breaker | 10AWG wire | Max 230°F --\u003e\u003c!-- Dimensions: 12.6\"W (320mm) x 12.6\"D (320mm) x 38.4\"H (975mm) --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- SGS certified | 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- Documents: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .st { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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gap: 8px; }\n    .st-feat { padding: 0.8rem 0.9rem; }\n    .st-inc-grid { grid-template-columns: 1fr; }\n    .st-spec-grid { gap: 1.25rem; }\n    .st-divider { margin: 1.25rem 0; }\n  }\n\n  \/* VERY SMALL PHONES *\/\n  @media (max-width: 380px) {\n    .st-spec-block { margin-bottom: 1rem; }\n    .st-spec-block h4 { font-size: 14px !important; }\n    .st-spec-table { font-size: 13px; }\n    .st-spec-table tr { padding: 7px 10px !important; margin-bottom: 6px !important; }\n    .st-spec-table td:first-child { font-size: 9px !important; }\n    .st-spec-table td:last-child { font-size: 13px !important; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"st\"\u003e\n\u003cdiv class=\"st-desc\"\u003e\n\u003ch2\u003eHUUM STEEL 6 STEEL Series 6kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM STEEL 6 is a 6kW floor-standing electric sauna heater for rooms from 212 to 353 cubic feet with an extraordinarily small footprint and the tightest safety clearances in the HUUM lineup. The STEEL's defining characteristic is its slim 12.6\"W x 12.6\"D stainless steel pillar profile - a square cross-section tower that stands 38.4\" tall and requires just 2\" (5 cm) of clearance from walls on all sides. HUUM describes the design intent precisely: the STEEL is a slim electric sauna heater with remarkably small safety distances, which makes it perfect for saunas with limited spaces. Despite its compact footprint, the STEEL 6 holds 330 lbs of rounded olivine sauna stones (10 boxes, 3-5 cm diameter, sold separately) through an intelligent internal structure. An internal air duct within the heater body circulates air through the stone mass to increase heating speed by up to 25%. The UKU Local or UKU Wi-Fi controller is required for operation and sold separately - no UKU Extension Box is needed for the 6kW model. Max temperature: 230°F (110°C). SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003e2\" safety distances - the slimmest installation footprint in the HUUM electric lineup\u003c\/h4\u003e\n\u003cp\u003eHUUM built the STEEL around a single clear design brief: minimize safety distances to make large stone-capacity electric heating possible in saunas where other heaters simply will not fit. At 2\" (5 cm) from walls on all sides for the STEEL 6, the clearances are smaller than any other HUUM electric heater model. For a sauna room in the 212-353 cu ft range - often compact by design - the difference between 2\" clearances and the 4-6\" required by larger floor heaters can meaningfully change bench placement options and available floor space. With the optional HUUM Reflect S reflector panel accessory, the safety distances can be halved even further. The optional STEEL safety railing (light wood profiles, sold separately) adds a protective guard around the heater for sessions with children or when additional bather safety is preferred.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stones and an internal air duct for faster heat-up\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 6's 330-lb stone capacity (10 boxes, 3-5 cm rounded olivine stones) is disproportionately large for its footprint - this is by design. HUUM's own description of the engineering logic: because of its intelligent design, the STEEL has a much higher stone capacity than other heaters, providing more consistent, high heat, better steam capability, and an elevated bathing experience. The internal air duct system is the key structural feature that makes this possible: air is channelled through the stone mass in a controlled pattern that distributes heat through the full stone column efficiently and increases heating speed by up to 25% compared to a heater without an air duct. The 330-lb stone load then sustains that heat long into the session, producing consistent soft steam with each ladle of water. Stones are 3-5 cm rounded olivine - slightly smaller than the 5-10 cm stones used in the HIVE Electric series.\u003c\/p\u003e\n\u003ch4\u003eUKU controller required - Local or Wi-Fi, no Extension Box at 6kW\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 6 requires a HUUM UKU controller for all operation - the heater has no built-in controls. Both UKU Local (physical panel) and UKU Wi-Fi (smartphone app via HUUM mobile app) controllers are compatible with the 6kW STEEL. An important distinction for buyers: the UKU Extension Box is not required for the STEEL 6. It is only required for HUUM heaters over 9kW (specifically 10.5kW and above). The UKU Wi-Fi controller enables remote preheating from a smartphone and integrates with lights, ventilation, and steamer functions when connected. Safety features built into all UKU controllers include door sensor, overheating protection, and child safety lock. 240V\/1PH, 30A circuit breaker, 10AWG wire required. A licensed electrician is required for all wiring and installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-hook\"\u003e6kW floor-standing electric sauna heater for rooms from 212 to 353 cubic feet. STEEL Series - slim 12.6\"W x 12.6\"D stainless steel pillar design. Tightest safety clearances in the HUUM electric lineup: just 2\" (5 cm) from walls on all sides. Internal air duct increases heating speed by up to 25%. 330 lbs stones required (10 boxes, 3-5 cm rounded olivine, sold separately). UKU Local or UKU Wi-Fi controller required - sold separately. No UKU Extension Box required for 6kW. Max temperature 230°F. 240V\/1PH - 30A circuit breaker - 10AWG. Dimensions: 12.6\"W x 12.6\"D x 38.4\"H. Optional: Reflect S reflector panel (can halve safety distances); STEEL safety railing; embedding flanges. Pallet delivery - scheduled freight required. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"st-badges\"\u003e\n\u003cspan class=\"st-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003e212 to 353 cu ft\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eSTEEL Series - slim 12.6\"W x 12.6\"D pillar design\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003e2\" safety clearances from walls - tightest in HUUM lineup\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eInternal air duct - heats up to 25% faster\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003e330 lbs stones required (10 boxes, 3-5 cm rounded olivine)\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eUKU Local or UKU Wi-Fi controller required - sold separately\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eNo UKU Extension Box required for 6kW\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003e240V\/1PH - 30A - 10AWG\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003e12.6\"W x 12.6\"D x 38.4\"H\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eOptional Reflect S - can halve safety distances\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eOptional STEEL safety railing\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003ePallet delivery required\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"st-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"st-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"st-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e212 to 353 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (10 boxes, 3-5 cm rounded olivine) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e3-5 cm rounded olivine (1-2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct benefit\u003c\/td\u003e\n\u003ctd\u003eIncreases heating speed by up to 25%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003eSafety distances\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAll sides (6kW model)\u003c\/td\u003e\n\u003ctd\u003e2 in (5 cm) - tightest in HUUM electric lineup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith Reflect S reflector panel\u003c\/td\u003e\n\u003ctd\u003eDistances can be halved further (optional accessory)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVs larger STEEL models\u003c\/td\u003e\n\u003ctd\u003eLarger STEEL models require 4 in (10 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e208V note\u003c\/td\u003e\n\u003ctd\u003eOutput reduces by 25% at 208V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 6kW (required for 10.5kW+ only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003eController (required - sold separately)\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible controllers\u003c\/td\u003e\n\u003ctd\u003eUKU Local | UKU Wi-Fi | UKU Glass | UKU Mirror | UKU Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local\u003c\/td\u003e\n\u003ctd\u003ePhysical panel - temperature, timer, door sensor, safety features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Wi-Fi\u003c\/td\u003e\n\u003ctd\u003ePhysical panel + smartphone remote via HUUM mobile app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU safety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntegration\u003c\/td\u003e\n\u003ctd\u003eCompatible with lights, ventilation, and steamer functions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSquare cross-section slim pillar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal structure\u003c\/td\u003e\n\u003ctd\u003eAir duct for 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone contact\u003c\/td\u003e\n\u003ctd\u003eStones loaded internally - air duct channels heat through stone mass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted, vertical orientation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUse environment\u003c\/td\u003e\n\u003ctd\u003eInterior sauna - wet area\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003eCertifications and warranty\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"st-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eHUUM Reflect S - can halve required safety distances\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eHUUM STEEL safety railing (light wood profiles)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmbedding flanges\u003c\/td\u003e\n\u003ctd\u003eAvailable for bench integration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNorth American adapter\u003c\/td\u003e\n\u003ctd\u003eN\/A - electric, no flue required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"st-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"st-inc-grid\"\u003e\n\u003cdiv class=\"st-inc-item\"\u003eHUUM STEEL 6 6kW floor-standing electric sauna heater with internal air duct\u003c\/div\u003e\n\u003cdiv class=\"st-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"st-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 330 lbs sauna stones (10 boxes, 3-5 cm rounded olivine - an additional box is recommended); HUUM UKU controller (Local or Wi-Fi). No UKU Extension Box is required for the 6kW model. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM Reflect S reflector panel; HUUM STEEL safety railing; embedding flanges. A licensed electrician is required for all wiring: 240V\/1PH, 30A circuit breaker, 10AWG wire.\u003c\/p\u003e\n\u003chr class=\"st-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL 6 stands out\u003c\/h3\u003e\n\u003cdiv class=\"st-feat-grid\"\u003e\n\u003cdiv class=\"st-feat\"\u003e\n\u003cdiv class=\"st-feat-title\"\u003e2\" safety clearances - the slimmest electric installation available\u003c\/div\u003e\n\u003cp\u003eHUUM describes the STEEL's defining advantage directly: remarkably small safety distances, perfect for saunas with limited spaces. At 2\" (5 cm) from walls on all sides, the STEEL 6 can be positioned in sauna rooms where no other HUUM electric heater would fit without consuming valuable bench space through required clearances. For a compact home sauna in the 212-353 cu ft range where every inch of floor area impacts usable bench space, 2\" clearances versus the 4-6\" required by conventional floor heaters is a meaningful difference. With the optional Reflect S reflector panel, those distances can be reduced even further. No other HUUM electric floor heater achieves 2\" clearances - this is unique to the smaller STEEL models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-feat\"\u003e\n\u003cdiv class=\"st-feat-title\"\u003e330 lbs of stones in a 12.6\" x 12.6\" pillar\u003c\/div\u003e\n\u003cp\u003eThree hundred and thirty pounds of sauna stones in a 12.6\" square footprint is an exceptional stone-to-footprint ratio. HUUM attributes this directly to the STEEL's intelligent internal design: a much higher stone capacity than other heaters, providing more consistent, high heat, better steam capability, and an elevated bathing experience. The internal air duct channels air through the stone mass to distribute heat evenly through the full stone column and ensures the stones are charged thoroughly during heat-up. For a 6kW heater in a 212-353 cu ft room, 330 lbs of stones means the thermal mass available per unit of floor space is exceptional - soft, consistent steam and long-lasting heat from a heater that takes up less floor space than many conventional alternatives.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-feat\"\u003e\n\u003cdiv class=\"st-feat-title\"\u003eInternal air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe internal air duct built into the STEEL's structure channels air through the stone mass in a controlled pattern, distributing heat through the full stone column more efficiently than in heaters where air simply circulates around the stones naturally. The result is a heat-up speed up to 25% faster than heaters without an air duct. For a 6kW heater in a compact sauna room, faster heat-up means a shorter wait from switch-on to bathing temperature - a practical benefit in everyday home sauna use where the heater is switched on shortly before the session rather than hours in advance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-feat\"\u003e\n\u003cdiv class=\"st-feat-title\"\u003eUKU controller - Local or Wi-Fi, no Extension Box for 6kW\u003c\/div\u003e\n\u003cp\u003eThe STEEL 6 works with any HUUM UKU controller: UKU Local (physical panel only), UKU Wi-Fi (physical panel plus HUUM mobile app for smartphone remote control), UKU Glass, UKU Mirror, or UKU Gold. All UKU controllers include door sensor, overheating protection, and child safety lock as standard safety features, and can be integrated with sauna lights, ventilation, and steamer functions when connected. An important specification note: the UKU Extension Box is not required for the 6kW STEEL. It is only required for HUUM heaters above 9kW. This simplifies the installation and reduces the total number of components required to operate the heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-feat\"\u003e\n\u003cdiv class=\"st-feat-title\"\u003eOptional Reflect S panel - halve the clearances further\u003c\/div\u003e\n\u003cp\u003eThe optional HUUM Reflect S reflector panel (sold separately) mounts on the heater and deflects radiant heat away from adjacent walls. HUUM states that the Reflect S panel makes it possible to achieve half the standard safety distances. For a sauna installation where even the 2\" standard STEEL clearances are constrained by existing bench or wall configurations, the Reflect S provides a path to even tighter positioning. The optional STEEL safety railing (light wood profiles, sold separately) provides a decorative and safety-oriented wooden guard around the heater - adding a natural material contrast to the stainless steel pillar and protecting bathers from accidental contact with the heated stone surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-feat\"\u003e\n\u003cdiv class=\"st-feat-title\"\u003eSTEEL Series - 6kW through 10.5kW floor models and 3.5kW wall model\u003c\/div\u003e\n\u003cp\u003eThe H1006012 is the 6kW entry point of the HUUM STEEL floor heater series. The STEEL Series also includes larger floor-standing models: STEEL 9 (9kW) and STEEL 10.5 (10.5kW) for larger room ranges. STEEL 9 and 10.5 models require 4\" (10 cm) clearances from walls rather than the 2\" clearances of the STEEL 6. The STEEL 10.5 also requires the UKU Extension Box. The STEEL Series also includes a wall-mounted STEEL 3.5 (3.5kW), which HUUM describes as an even slimmer model suitable for very small sauna rooms. All STEEL heaters share the same slim pillar aesthetic, internal air duct design, rounded olivine stone specification (3-5 cm), SGS certification, and 5-year limited warranty. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"st-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv style=\"text-align: start;\" class=\"st-brand1\"\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM STEEL 6 H1006012 6kW electric sauna heater slim 12.6 inch pillar 212-353 cu ft 330 lbs stones 2 inch clearances\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-steel-6-kw-240v-electric-sauna-heater-1182037501.jpg?v=1781633710\u0026amp;width=800\" class=\"st-brand-img\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"st-brand-tag\"\u003eDesigned in Estonia - SGS Certified - STEEL Series - 2\" Safety Clearances\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 6. 6kW. 212-353 cu ft. 2\" clearances. 330 lbs of stones. 25% faster heat-up.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL 6 is a 6kW slim stainless steel pillar heater for compact home saunas - 2\" safety clearances from walls (tightest in the HUUM lineup), internal air duct for 25% faster heat-up, 330 lbs of stones in a 12.6\" x 12.6\" footprint, and UKU controller compatibility for physical or smartphone remote operation. UKU controller and 330 lbs stones (10 boxes, 3-5 cm) required and sold separately. No UKU Extension Box required. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"st-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW electric\u003c\/strong\u003e - 212-353 cu ft - STEEL slim pillar design\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2\" safety clearances from walls\u003c\/strong\u003e - tightest in HUUM electric lineup\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e330 lbs stones required (10 boxes, 3-5 cm rounded olivine)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eInternal air duct - 25% faster heat-up\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUKU controller required (no Extension Box) - 240V\/1PH - 30A - 10AWG\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"st-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"st-brand-tag\"\u003eSTEEL 6 vs HIVE Electric vs HIVE 12 - HUUM electric heater comparison\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 6 vs HIVE 12 Electric vs STEEL 10.5 - choosing the right HUUM electric heater\u003c\/h4\u003e\n\u003cp\u003eThree HUUM electric heaters serve different room sizes and installation priorities. HUUM STEEL 6 H1006012 (this listing): 6kW, 212-353 cu ft, slim 12.6\"W x 12.6\"D pillar, 330 lbs stones (10 boxes, 3-5 cm), 2\" clearances from walls, no UKU Extension Box required, single 30A breaker. Right for compact home saunas where tight clearances, a slim footprint, and the 6kW output range are the specification. HUUM STEEL 10.5: 10.5kW, larger room range, 4\" clearances (larger body), UKU Extension Box required. Right when more output is needed and slightly wider clearances are acceptable. HUUM HIVE 12 Electric H1003012: 12kW, 424-636 cu ft, open cylindrical beehive design, very large stone capacity, 240V\/1PH with dual 30A breakers, UKU Extension Box required. Right for larger rooms where the HIVE's cylindrical stone-column design and higher output are the specification. The STEEL 6 is the right choice when 2\" wall clearances, a slim 12.6\" pillar profile, and 6kW output for a 212-353 cu ft room are the priorities.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" alt=\"HUUM STEEL 6 slim 2 inch clearances vs STEEL 10.5 more output vs HIVE 12 Electric cylindrical larger room comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-steel-6-kw-240v-electric-sauna-heater-1182030773.jpg?v=1781633979\u0026amp;width=800\" class=\"st-brand-img\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"st-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"st-manual\"\u003e\n\u003cdiv class=\"st-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" class=\"st-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"st-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"st-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"st-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"st-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"st-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"st-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"st-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL 6 carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of incorrect stone type or size (decorative stones must not be used as they can break under heat; use only rounded olivine 3-5 cm), operating without the required stone load, or damage from inadequate electrical installation. HUUM recommends using rounded olivine sauna stones to complement the heater's design and achieve milder steam. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52362257105178,"sku":"H1006012","price":2033.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-heater-huum-steel-6-kw-240v-electric-sauna-heater-1182037502.jpg?v=1781633699"},{"product_id":"huum-steel-mini-4-steel-mini-series-3-5kw-sauna-heater","title":"HUUM STEEL Mini 4 STEEL Mini Series 3.5kW Sauna Heater","description":"\u003c!-- HUUM STEEL Mini 4 - STEEL Mini Series Electric Sauna Heater - H1007012 --\u003e\u003c!-- SKU: H1007012 | STEEL Mini Series | 106-177 cu ft (adjusted) | Wall-mounted electric --\u003e\u003c!-- Model: STEEL Mini 4 | 3.5kW | Stainless steel slim wall-mounted pillar --\u003e\u003c!-- Wall-mounted \/ floor-anchored - narrower version of STEEL 6 at only 6\"D --\u003e\u003c!-- Open-air stone design - 132 lbs stones visible - elegant ambience --\u003e\u003c!-- Safety distances: sides 2.5\" (6.4 cm) \/ front 15.5\" --\u003e\u003c!-- Internal air tunnel - heats up to 25% faster - extends element life --\u003e\u003c!-- 132 lbs stones (4 boxes, 3-5 cm rounded olivine) required - sold separately --\u003e\u003c!-- UKU Local or UKU Wi-Fi controller required - sold separately --\u003e\u003c!-- No UKU Extension Box required for 3.5kW --\u003e\u003c!-- 240V\/1PH | 15A circuit breaker | 14AWG wire | Max 230°F --\u003e\u003c!-- Dimensions: 12.6\"W (320mm) x 6\"D (152mm) x 38.4\"H (975mm) --\u003e\u003c!-- Includes: heater body, wall mounting bracket, installation manual --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- SGS certified | 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- Documents: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .sm { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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border-radius: 6px !important; margin-bottom: 6px !important; padding: 8px 12px !important; background: #fff !important; }\n    .sm-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sm-spec-table td { border: none !important; padding: 1px 0 !important; white-space: normal !important; overflow: visible !important; overflow-wrap: anywhere !important; word-break: normal !important; line-height: 1.5 !important; }\n    .sm-spec-table td:first-child { font-size: 10px !important; font-weight: 600 !important; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b !important; width: 100% !important; padding-bottom: 2px !important; overflow-wrap: anywhere !important; }\n    .sm-spec-table td:last-child { font-size: 15px !important; font-weight: 700 !important; color: #0f172a !important; width: 100% !important; overflow-wrap: anywhere !important; word-break: normal !important; }\n  }\n\n  @media (max-width: 480px) {\n    .sm { padding: 0; }\n    .sm-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sm-feat { padding: 0.8rem 0.9rem; }\n    .sm-inc-grid { grid-template-columns: 1fr; }\n    .sm-spec-grid { gap: 1.25rem; }\n    .sm-divider { margin: 1.25rem 0; }\n  }\n\n  \/* VERY SMALL PHONES *\/\n  @media (max-width: 380px) {\n    .sm-spec-block { margin-bottom: 1rem; }\n    .sm-spec-block h4 { font-size: 14px !important; }\n    .sm-spec-table { font-size: 13px; }\n    .sm-spec-table tr { padding: 7px 10px !important; margin-bottom: 6px !important; }\n    .sm-spec-table td:first-child { font-size: 9px !important; }\n    .sm-spec-table td:last-child { font-size: 13px !important; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sm\"\u003e\n\u003cdiv class=\"sm-desc\"\u003e\n\u003ch2\u003eHUUM STEEL Mini 4 STEEL Mini Series 3.5kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM STEEL Mini 4 is a 3.5kW wall-mounted electric sauna heater for small sauna rooms from 106 to 177 adjusted cubic feet - HUUM's most compact and narrowest electric floor model, and the entry point of the STEEL Series lineup. The STEEL Mini mounts on the sauna wall and anchors at the floor for stability, with a profile of just 12.6\"W x 6\"D x 38.4\"H - only half the depth of the full STEEL 6's 12.6\"D body. Despite this ultra-slim depth of 6\", the STEEL Mini holds 132 lbs of sauna stones (4 boxes, 3-5 cm rounded olivine, sold separately) in an open-air design that showcases all the stones and keeps the heating elements in direct contact with the stone mass. HUUM's description of the visual and experiential quality is direct: an open-air design showcases all 132 lbs of stone, bringing an ambience of natural charm while encouraging water-pouring for powerful, soft steam. Safety distances from walls are just 2.5\" (6.4 cm) on the sides. An internal air tunnel increases heating speed by up to 25% and extends element life. The UKU Local or UKU Wi-Fi controller is required and sold separately. No UKU Extension Box is needed for the 3.5kW model. 240V\/1PH, 15A circuit breaker, 14AWG. Max temperature 230°F. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eSTEEL Mini - the narrowest HUUM electric heater, wall-mounted for small saunas\u003c\/h4\u003e\n\u003cp\u003eThe STEEL Mini is described by HUUM directly as an even slimmer 3.5kW wall-mounted model which is particularly suitable for very small sauna rooms. At 6\" depth, it is half as deep as the STEEL 6 (12.6\"D) and designed specifically for sauna rooms and installation layouts where even the full STEEL's compact profile would be too much. The wall-mounting bracket included with the STEEL Mini anchors the heater to the wall; a floor anchor provides additional stability. For a small apartment sauna, a compact personal sauna, or any room in the 106-177 cu ft range where the wall must carry the heater rather than the floor, the STEEL Mini is the purpose-built specification in the HUUM electric lineup. The open-air stone design - with the full 132-lb stone column exposed - gives the STEEL Mini a visual presence larger than its 6\" depth suggests.\u003c\/p\u003e\n\u003ch4\u003eOpen-air stones, direct element contact, and an air tunnel\u003c\/h4\u003e\n\u003cp\u003eUnlike the STEEL 6's enclosed stone cavity, the STEEL Mini features an open-air design where the stone mass is fully visible and exposed from the front. HUUM and multiple authorized dealers describe this as one of the STEEL Mini's distinctive qualities: more exposed stones create a longer and milder heat, with better steam capability. The heating elements are in direct contact with the stones, maximising heat transfer from element surface to stone mass. The internal air tunnel system channels air through the stone column to distribute heat efficiently and increase heating speed by up to 25%. HUUM notes that the air tunnel also extends the life of the heating elements by preventing localized overheating at element surfaces. At 3.5kW on 240V\/1PH, 15A circuit, and 14AWG wire, the STEEL Mini is also the most electrically straightforward HUUM heater - requiring less electrical capacity than any other model in the lineup.\u003c\/p\u003e\n\u003ch4\u003e132 lbs of stones in a 6\"-deep wall mount - proportionally exceptional capacity\u003c\/h4\u003e\n\u003cp\u003eHUUM states plainly that the STEEL Mini has an exceptionally large rock capacity compared with other heaters in this power range, resulting in more consistent heat, more steam capability, and a superior bathing experience. At 132 lbs of rounded olivine stones (4 boxes, 3-5 cm) in a 3.5kW heater, the stone-to-power ratio is deliberately high: the large stone mass accumulates heat gradually and releases it consistently throughout the session, producing long-lasting, mild steam rather than the sharp, brief steam of a low-stone-mass heater cycling on and off rapidly. For a small personal sauna where soft, sustained heat quality is a priority over raw output, the STEEL Mini's stone capacity makes it an elevated choice for its power class.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-hook\"\u003e3.5kW wall-mounted electric sauna heater for rooms from 106 to 177 adjusted cubic feet. STEEL Mini Series - HUUM's narrowest electric model. Ultra-slim 12.6\"W x 6\"D x 38.4\"H wall-mount profile. Open-air stone design - 132 lbs stones fully visible. Direct element-to-stone contact. Internal air tunnel - heats up to 25% faster - extends element life. Safety distances: 2.5\" (6.4 cm) sides. 132 lbs stones required (4 boxes, 3-5 cm rounded olivine, sold separately). UKU Local or UKU Wi-Fi controller required - sold separately. No UKU Extension Box required. Max temperature 230°F. 240V\/1PH - 15A circuit breaker - 14AWG. Dimensions: 12.6\"W x 6\"D x 38.4\"H. Pallet delivery required. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sm-badges\"\u003e\n\u003cspan class=\"sm-badge\"\u003e3.5 kW\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003e106 to 177 cu ft (adjusted)\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eSTEEL Mini Series - HUUM's narrowest electric model\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eWall-mounted - floor-anchored\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eUltra-slim 6\"D profile\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eOpen-air stone design - 132 lbs fully visible\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eDirect element-to-stone contact\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eInternal air tunnel - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eSafety distances: 2.5\" sides\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003e132 lbs stones required (4 boxes, 3-5 cm rounded olivine)\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eUKU controller required - sold separately\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003e240V\/1PH - 15A - 14AWG\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003e12.6\"W x 6\"D x 38.4\"H\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"sm-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sm-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sm-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e3.5 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e106 to 177 cu ft (adjusted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e132 lbs \/ 60 kg (4 boxes, 3-5 cm rounded olivine) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e3-5 cm rounded olivine (1-2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir tunnel benefit\u003c\/td\u003e\n\u003ctd\u003eHeats up to 25% faster - extends element life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone design\u003c\/td\u003e\n\u003ctd\u003eOpen-air - stones fully visible - direct element contact\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003eSafety distances\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides (A)\u003c\/td\u003e\n\u003ctd\u003e2.5 in (6.4 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront (B)\u003c\/td\u003e\n\u003ctd\u003e15.5 in (393 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL Mini vs STEEL 6 sides\u003c\/td\u003e\n\u003ctd\u003eSTEEL Mini: 2.5 in | STEEL 6: 2.0 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e15A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e14AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required (only needed for 10.5kW+ models)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003eController (required - sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible controllers\u003c\/td\u003e\n\u003ctd\u003eUKU Local | UKU Wi-Fi | UKU Glass | UKU Mirror | UKU Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local\u003c\/td\u003e\n\u003ctd\u003ePhysical panel - temperature, timer, safety features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Wi-Fi\u003c\/td\u003e\n\u003ctd\u003ePhysical panel + HUUM mobile app remote control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU safety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e6 in (152 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eWall-mounted + floor-anchored for stability\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003eSTEEL Mini vs STEEL 6 - dimension comparison\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth (both)\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm) - identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight (both)\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm) - identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth - STEEL Mini\u003c\/td\u003e\n\u003ctd\u003e6 in (152 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth - STEEL 6\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity - STEEL Mini\u003c\/td\u003e\n\u003ctd\u003e132 lbs (4 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity - STEEL 6\u003c\/td\u003e\n\u003ctd\u003e330 lbs (10 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003eSTEEL Mini: 15A \/ STEEL 6: 30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eSTEEL Mini: 14AWG \/ STEEL 6: 10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003eConstruction\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody material\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElements\u003c\/td\u003e\n\u003ctd\u003eIndustrial-grade stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone design\u003c\/td\u003e\n\u003ctd\u003eOpen-air - stones visible and exposed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eElement-stone contact\u003c\/td\u003e\n\u003ctd\u003eDirect - maximum heat transfer efficiency\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal air tunnel\u003c\/td\u003e\n\u003ctd\u003eYes - 25% faster heat-up, extends element life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-spec-block\"\u003e\n\u003ch4\u003eOptional accessories (sold separately)\u003c\/h4\u003e\n\u003ctable class=\"sm-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eHUUM STEEL safety railing (light wood profiles)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEmbedding flanges\u003c\/td\u003e\n\u003ctd\u003eAvailable for bench integration\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eHUUM Reflect S (can reduce safety distances further)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sm-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sm-inc-grid\"\u003e\n\u003cdiv class=\"sm-inc-item\"\u003eHUUM STEEL Mini 4 3.5kW wall-mounted electric sauna heater with internal air tunnel\u003c\/div\u003e\n\u003cdiv class=\"sm-inc-item\"\u003eWall mounting bracket\u003c\/div\u003e\n\u003cdiv class=\"sm-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"sm-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 132 lbs sauna stones (4 boxes, 3-5 cm rounded olivine - an additional box is recommended); HUUM UKU controller (Local or Wi-Fi). No UKU Extension Box is required for the 3.5kW model. \u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM STEEL safety railing; embedding flanges; HUUM Reflect S reflector panel. A licensed electrician is required for all wiring: 240V\/1PH, 15A circuit breaker, 14AWG wire.\u003c\/p\u003e\n\u003chr class=\"sm-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL Mini 4 stands out\u003c\/h3\u003e\n\u003cdiv class=\"sm-feat-grid\"\u003e\n\u003cdiv class=\"sm-feat\"\u003e\n\u003cdiv class=\"sm-feat-title\"\u003eOnly 6\" deep - HUUM's narrowest electric model\u003c\/div\u003e\n\u003cp\u003eAt 6\" (152mm) depth, the STEEL Mini is the narrowest electric sauna heater HUUM produces - half the depth of the full STEEL 6 and significantly shallower than any other HUUM electric floor model. HUUM describes it as an even slimmer 3.5kW wall-mounted model particularly suitable for very small sauna rooms. For a compact apartment sauna, a personal barrel sauna, or a custom sauna built into a tight space, the STEEL Mini's 6\" depth means it occupies significantly less wall-to-bench clearance than any HUUM alternative. The 12.6\" width is identical to the full STEEL 6 - the significant dimension reduction is entirely in the depth.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-feat\"\u003e\n\u003cdiv class=\"sm-feat-title\"\u003eOpen-air stone design - 132 lbs fully visible\u003c\/div\u003e\n\u003cp\u003eThe STEEL Mini's open-air stone design is visually and experientially distinct from heaters with enclosed stone cavities. All 132 lbs of rounded olivine stones are visible from inside the sauna - the full stone column is exposed and the warm, natural texture of the stones becomes part of the sauna's visual character. HUUM's description of the experience: an open-air design showcases all 132 lbs of stone, bringing an ambience of natural charm while encouraging water-pouring for powerful, soft steam. The exposed stones also allow direct contact between the heating elements and the stone mass, maximising heat transfer efficiency from element to stone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-feat\"\u003e\n\u003cdiv class=\"sm-feat-title\"\u003e132 lbs of stones at 3.5kW - exceptionally high ratio\u003c\/div\u003e\n\u003cp\u003eAt 132 lbs of stones in a 3.5kW heater, the STEEL Mini has an exceptionally high stone-to-power ratio. HUUM states this directly: the STEEL Mini has an exceptionally large rock capacity compared with other heaters in this power range, resulting in more consistent heat, more steam capability, and a superior bathing experience. The large stone mass relative to the power input means the stones take longer to reach full temperature, but once charged they hold heat and produce consistent steam through the full session with minimal cycling. For a small personal sauna where long-lasting soft steam quality matters more than fast heat-up time, this ratio is exactly the right design trade-off.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-feat\"\u003e\n\u003cdiv class=\"sm-feat-title\"\u003eInternal air tunnel - 25% faster heat-up, longer element life\u003c\/div\u003e\n\u003cp\u003eThe internal air tunnel channels air through the stone mass in a controlled pattern, distributing heat evenly through the full 132-lb stone column and increasing heating speed by up to 25%. The air tunnel also reduces thermal stress on the heating elements by preventing localised heat concentration at element surfaces - HUUM notes that the air tunnel extends element life as a direct benefit. For a 3.5kW heater heating a 106-177 cu ft sauna room, the 25% faster heat-up translates to a meaningfully shorter wait from switch-on to bathing temperature. The air tunnel is the same design principle used in the full STEEL 6, scaled to the Mini's narrower body.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-feat\"\u003e\n\u003cdiv class=\"sm-feat-title\"\u003e15A \/ 14AWG - the lightest electrical requirement in the HUUM lineup\u003c\/div\u003e\n\u003cp\u003eThe STEEL Mini 4 requires just a 15A circuit breaker and 14AWG wire - the smallest electrical capacity of any HUUM heater. This is practically significant for installations in older homes, apartments, or sauna buildings where additional electrical capacity is limited. Many apartment sauna installations and small home saunas already have a 15A 240V circuit available. No UKU Extension Box is required for the 3.5kW model - only the heater and a UKU controller (Local or Wi-Fi) are needed for a complete operating system. The STEEL Mini is the most electrically accessible HUUM electric heater in the lineup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-feat\"\u003e\n\u003cdiv class=\"sm-feat-title\"\u003eSTEEL Series - Mini 4, STEEL 6, STEEL 9, STEEL 10.5\u003c\/div\u003e\n\u003cp\u003eThe H1007012 is the 3.5kW wall-mounted entry point of the HUUM STEEL Series. The STEEL Series also includes floor-standing models: STEEL 6 (6kW, 212-353 cu ft, 12.6\"D, 330 lbs stones \/ 10 boxes, 30A\/10AWG, 2\" clearances), STEEL 9 (9kW, 4\" clearances), and STEEL 10.5 (10.5kW, requires UKU Extension Box). The STEEL Mini 4 at 3.5kW serves the smallest sauna rooms (106-177 cu ft) where wall mounting, a 6\"-depth profile, and a 15A electrical footprint are the specification. All STEEL models share the HUUM STEEL design aesthetic, internal air tunnel, direct element-to-stone contact, rounded olivine stone specification (3-5 cm), SGS certification, and 5-year limited warranty. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sm-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sm-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg class=\"sm-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-steel-mini-3-5-kw-240v-electric-sauna-heater-1182037521.jpg?v=1781637438\u0026amp;width=800\" alt=\"HUUM STEEL Mini 4 H1007012 3.5kW wall-mounted electric sauna heater 106-177 cu ft 132 lbs stones 6 inch depth open-air design\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sm-brand-tag\"\u003eDesigned in Estonia - SGS Certified - STEEL Mini Series - Wall-Mounted\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL Mini 4. 3.5kW. 106-177 cu ft. 6\" deep. 132 lbs stones. Open-air design. Wall-mounted.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL Mini 4 is HUUM's narrowest electric model - a 3.5kW wall-mounted heater for the smallest home saunas, just 6\" deep with an open-air stone design that showcases all 132 lbs of rounded olivine stones. Internal air tunnel for 25% faster heat-up. 2.5\" side clearances. UKU controller and 132 lbs stones (4 boxes, 3-5 cm) required and sold separately. No UKU Extension Box required. 15A\/14AWG. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sm-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e3.5kW electric\u003c\/strong\u003e - 106-177 cu ft (adjusted) - STEEL Mini wall-mounted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-slim 6\"D profile\u003c\/strong\u003e - HUUM's narrowest electric model\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen-air stone design\u003c\/strong\u003e - 132 lbs fully visible - direct element contact\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal air tunnel\u003c\/strong\u003e - 25% faster heat-up - 2.5\" side clearances\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUKU controller required (no Extension Box) - 15A - 14AWG - SGS certified\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sm-brand-tag\"\u003eSTEEL Mini 4 vs STEEL 6 vs HIVE 12 - HUUM electric heater sizing guide\u003c\/span\u003e\n\u003ch4\u003eSTEEL Mini 4 vs STEEL 6 vs HIVE 12 Electric - selecting the right HUUM electric heater\u003c\/h4\u003e\n\u003cp\u003eThree HUUM electric heaters span the full range from smallest to largest home sauna room. HUUM STEEL Mini 4 H1007012 (this listing): 3.5kW, 106-177 cu ft (adjusted), wall-mounted, 12.6\"W x 6\"D, 132 lbs stones (4 boxes, 3-5 cm), 2.5\" side clearances, 15A\/14AWG, open-air stone design. Right for the smallest sauna rooms where wall mounting, a 6\"-depth profile, and minimum electrical footprint are the specification. HUUM STEEL 6 H1006012: 6kW, 212-353 cu ft, floor-standing, 12.6\"W x 12.6\"D, 330 lbs stones (10 boxes, 3-5 cm), 2\" side clearances, 30A\/10AWG. Right for small to medium home saunas where floor standing and 6kW are needed. HUUM HIVE 12 Electric H1003012: 12kW, 424-636 cu ft, cylindrical open beehive design, very large stone capacity (approx. 550 lbs), dual 30A breakers, UKU Extension Box required. Right for larger rooms where the HIVE's distinctive cylindrical design and high output are the specification. All three carry HUUM's 5-year warranty and require a UKU controller sold separately. Choose the STEEL Mini 4 for rooms from 106 to 177 adjusted cubic feet where wall mounting, minimal depth, and light electrical requirements are the priorities.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg class=\"sm-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-steel-mini-3-5-kw-240v-electric-sauna-heater-1182030755_c40a4455-f558-4019-9c73-7c94a4648983.png?v=1781637816\u0026amp;width=800\" alt=\"HUUM STEEL Mini 4 3.5kW wall-mounted vs STEEL 6 6kW floor vs HIVE 12 Electric 12kW cylindrical HUUM electric heater comparison\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sm-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sm-manual\"\u003e\n\u003cdiv class=\"sm-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sm-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sm-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca class=\"sm-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sm-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca class=\"sm-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sm-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca class=\"sm-doc-link\" href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sm-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL Mini 4 carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of incorrect stone type or size (decorative stones must not be used as they can break under heat; use only rounded olivine 3-5 cm), operating without the required stone load, or damage from inadequate electrical installation. HUUM recommends using rounded olivine sauna stones for milder steam and to complement the open-air design of the STEEL Mini. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"Default Title","offer_id":52362505224474,"sku":"H1007012","price":1576.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-sauna-heater-huum-steel-mini-3-5-kw-240v-electric-sauna-heater-1182037521.jpg?v=1781637438"},{"product_id":"huum-cliff-6-cliff-series-6kw-sauna-heater","title":"HUUM CLIFF 6 CLIFF Series 6kW Sauna Heater","description":"\u003c!-- HUUM CLIFF 6 - CLIFF Series Electric Sauna Heater - H1004012 --\u003e\u003c!-- SKU: H1004012 | CLIFF Series | 176-353 cu ft | Floor-mounted electric --\u003e\u003c!-- Model: CLIFF 6 | 6kW | Stainless steel slim floor heater - narrower than STEEL 6 --\u003e\u003c!-- CLIFF is narrower than STEEL: 10.6\"W vs 12.6\"W | 6.3\"D vs 12.6\"D --\u003e\u003c!-- Minimalist steel cage made from recycled cutouts of STEEL heater manufacturing --\u003e\u003c!-- Removable rib slats for precise and accurate stone stacking --\u003e\u003c!-- Safety distances: 2.36\" (6 cm) sides - tighter than STEEL 6's 2\" \/ different direction --\u003e\u003c!-- Internal air duct - heats up to 25% faster --\u003e\u003c!-- 165 lbs stones (5 boxes, 3-5 cm rounded olivine) required - sold separately --\u003e\u003c!-- UKU Local or UKU Wi-Fi controller required - sold separately --\u003e\u003c!-- No UKU Extension Box required for 6kW --\u003e\u003c!-- Optional: Rail C safety railing | Reflect C reflector panel | Flange CS for bench embedding --\u003e\u003c!-- 240V\/1PH | 30A circuit breaker | 10AWG wire | Max 230°F --\u003e\u003c!-- Dimensions: 10.6\"W (270mm) x 6.3\"D (160mm) x 38.4\"H (975mm) --\u003e\u003c!-- Award-winning design - inspired by sheer rock cliffs of Estonian landscape --\u003e\u003c!-- Pallet delivery - scheduled freight appointment required --\u003e\u003c!-- SGS certified | 5-year limited warranty (excluding elements) --\u003e\u003c!-- Designed and made in Estonia by HUUM --\u003e\u003c!-- Documents: IOM | Warranty | Element Requirements | Stone Requirements | Certificate of Compliance | Size Your Sauna --\u003e\n\u003cstyle\u003e\n  .cf { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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border: 1px solid #bfd4ef; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #1e3a5f !important; line-height: 1.6 !important; font-size: 14px; }\n  .cf-notice-yellow { background: #fffbeb; border: 1px solid #fcd34d; border-radius: 6px; padding: 0.9rem 1.1rem; margin-bottom: 1.5rem; font-weight: 500 !important; color: #78350f !important; line-height: 1.6 !important; font-size: 14px; }\n  .cf-warranty { background: #f8fafc; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; }\n  .cf-warranty p { font-weight: 500 !important; color: #0f172a !important; line-height: 1.7 !important; margin: 0 0 0.75rem; }\n  .cf-warranty p:last-child { margin: 0; }\n  .cf-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .cf-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .cf-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .cf-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .cf-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .cf-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .cf-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n\n  \/* TABLET \/ SMALL LAPTOP *\/\n  @media (max-width: 900px) {\n    .cf-spec-block { margin-bottom: 1.25rem; }\n    .cf-spec-table { table-layout: fixed; font-size: 14px; }\n    .cf-spec-table td:first-child { width: 40%; }\n    .cf-spec-table td:last-child { width: 60%; }\n  }\n\n  @media (max-width: 768px) {\n    .cf-feat-grid { grid-template-columns: 1fr 1fr; }\n    .cf-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .cf-brand1, .cf-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .cf-brand2 { display: flex; flex-direction: column-reverse; }\n    .cf-brand1 h4, .cf-brand2 h4 { font-size: 18px !important; }\n  }\n\n  \/* MOBILE *\/\n  @media (max-width: 600px) {\n    .cf-spec-grid { display: block; width: 100%; max-width: 100%; }\n    .cf-spec-grid \u003e div { display: block; width: 100%; max-width: 100%; }\n    .cf-spec-block { display: block; width: 100%; max-width: 100%; margin-bottom: 1.25rem; }\n    .cf-spec-block h4 { display: block; width: fit-content; max-width: 100%; font-size: 15px !important; line-height: 1.35 !important; overflow-wrap: anywhere; }\n\n    .cf-spec-table, .cf-spec-table tbody, .cf-spec-table tr, .cf-spec-table td { display: block !important; width: 100% !important; max-width: 100% !important; }\n    .cf-spec-table { border: none !important; border-collapse: separate !important; border-spacing: 0 !important; table-layout: auto !important; font-size: 14px; }\n    .cf-spec-table tr { border: 1px solid #e2e8f0 !important; border-radius: 6px !important; margin-bottom: 6px !important; padding: 8px 12px !important; background: #fff !important; }\n    .cf-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .cf-spec-table td { border: none !important; padding: 1px 0 !important; white-space: normal !important; overflow: visible !important; overflow-wrap: anywhere !important; word-break: normal !important; line-height: 1.5 !important; }\n    .cf-spec-table td:first-child { font-size: 10px !important; font-weight: 600 !important; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b !important; width: 100% !important; padding-bottom: 2px !important; overflow-wrap: anywhere !important; }\n    .cf-spec-table td:last-child { font-size: 15px !important; font-weight: 700 !important; color: #0f172a !important; width: 100% !important; overflow-wrap: anywhere !important; word-break: normal !important; }\n  }\n\n  @media (max-width: 480px) {\n    .cf { padding: 0; }\n    .cf-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .cf-feat { padding: 0.8rem 0.9rem; }\n    .cf-inc-grid { grid-template-columns: 1fr; }\n    .cf-spec-grid { gap: 1.25rem; }\n    .cf-divider { margin: 1.25rem 0; }\n  }\n\n  \/* VERY SMALL PHONES *\/\n  @media (max-width: 380px) {\n    .cf-spec-block { margin-bottom: 1rem; }\n    .cf-spec-block h4 { font-size: 14px !important; }\n    .cf-spec-table { font-size: 13px; }\n    .cf-spec-table tr { padding: 7px 10px !important; margin-bottom: 6px !important; }\n    .cf-spec-table td:first-child { font-size: 9px !important; }\n    .cf-spec-table td:last-child { font-size: 13px !important; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"cf\"\u003e\n\u003cdiv class=\"cf-desc\"\u003e\n\u003ch2\u003eHUUM CLIFF 6 CLIFF Series 6kW Sauna Heater\u003c\/h2\u003e\n\u003cp\u003eThe HUUM CLIFF 6 is a 6kW floor-mounted electric sauna heater for rooms from 176 to 353 cubic feet - HUUM's slimmest and narrowest floor-standing electric heater, and the only model in the HUUM lineup with a minimalist open cage structure made from the recycled cutouts of the STEEL heater manufacturing process. At 10.6\"W x 6.3\"D x 38.4\"H, the CLIFF 6 is narrower and shallower than the STEEL 6 (12.6\"W x 12.6\"D), and its side clearances of 2.36\" (6 cm) from combustible materials make it the most compact floor installation in the HUUM electric lineup. The CLIFF's distinctive cage design - described by HUUM's authorized dealers as inspired by the sheer rock cliffs of Estonia's landscape and winner of design awards - holds 165 lbs of rounded olivine sauna stones (5 boxes, 3-5 cm, sold separately) with removable rib slats for precise, accurate stone stacking. An internal air duct increases heating speed by up to 25%. The UKU Local or UKU Wi-Fi controller is required and sold separately. No UKU Extension Box is needed for the 6kW model. 240V\/1PH, 30A, 10AWG. Max 230°F. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/p\u003e\n\u003ch4\u003eCLIFF design - recycled steel cage, inspired by Estonian rock cliffs\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF's cage is not simply a design choice - it has a material story behind it. HUUM's authorized dealers describe it precisely: the minimalist steel cage is made from the recycled cutouts of the HUUM STEEL heater, eliminating material waste to celebrate the nature that inspires the award-winning design. Every CLIFF cage is fabricated from the steel that was removed during STEEL heater manufacturing, turning a production byproduct into a structural and aesthetic feature. The CLIFF's form draws from the vertical, striated profile of the rock cliff faces that HUUM's team encountered in the Estonian landscape - a slim, tall profile with visible structural lines. The result is a heater that authorized dealers consistently describe as looking exceptional in a sauna room and winning design awards for the combination of material story, visual simplicity, and functional purpose.\u003c\/p\u003e\n\u003ch4\u003eRemovable rib slats - precise stone stacking, no air gaps\u003c\/h4\u003e\n\u003cp\u003eA practical feature unique to the CLIFF within the HUUM electric lineup is its removable rib slats. The rib slats can be removed individually to allow more accurate stacking of the sauna stones within the cage structure. Two prop blocks are included with the heater specifically to assist with removing the rib slats during stone loading. This enables the bather or installer to arrange the stones with fewer air gaps and a tighter, more intentional stack - maximizing the stone-to-volume ratio within the CLIFF's open cage and producing more consistent heat distribution and steam quality. Dealers recommend using rounded 3-5 cm olivine stones in the CLIFF to complement the open cage design aesthetically and achieve the mildest possible steam quality from the stone mass.\u003c\/p\u003e\n\u003ch4\u003e10.6\" wide and 6.3\" deep - the narrowest floor heater in the HUUM lineup\u003c\/h4\u003e\n\u003cp\u003eThe CLIFF 6's 10.6\"W x 6.3\"D footprint is the slimmest floor heater profile in the HUUM electric lineup. Compared to the STEEL 6's 12.6\"W x 12.6\"D, the CLIFF 6 is 2\" narrower and 6.3\" shallower - a substantial difference in a compact sauna room where the stove-to-bench clearance determines how much usable bench space is available. The CLIFF Series also includes a wall-mounted 4kW Mini model for even smaller rooms. Safety clearances of 2.36\" (6 cm) at the sides - along with the Reflect C reflector panel accessory (sold separately) that can halve those distances further - give the CLIFF 6 the most compact combined footprint-plus-clearance profile of any HUUM electric floor heater. At 30A\/10AWG with the same electrical specification as the STEEL 6, the CLIFF 6 requires no different electrical preparation than the STEEL platform.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-hook\"\u003e6kW floor-mounted electric sauna heater for rooms from 176 to 353 cubic feet. CLIFF Series - narrowest floor heater in HUUM lineup: 10.6\"W x 6.3\"D x 38.4\"H. Minimalist open steel cage made from recycled STEEL heater cutouts. Award-winning design inspired by Estonian rock cliffs. Removable rib slats for precise stone stacking. Internal air duct - heats up to 25% faster. Side clearances: 2.36\" (6 cm). 165 lbs stones required (5 boxes, 3-5 cm rounded olivine, sold separately). UKU Local or UKU Wi-Fi controller required - sold separately. No UKU Extension Box required for 6kW. Max temperature 230°F. 240V\/1PH - 30A - 10AWG. Optional: Rail C safety railing, Reflect C reflector panel (halves clearances), Flange CS bench embedding. Pallet delivery - scheduled freight required. SGS certified. 5-year limited warranty (excluding elements). Designed and made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"cf-badges\"\u003e\n\u003cspan class=\"cf-badge\"\u003e6 kW\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003e176 to 353 cu ft\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eCLIFF Series - narrowest floor heater in HUUM lineup\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003e10.6\"W x 6.3\"D x 38.4\"H\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eOpen steel cage - recycled STEEL heater cutouts\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eAward-winning design - inspired by Estonian rock cliffs\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eRemovable rib slats - precise stone stacking\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eInternal air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eSide clearances: 2.36\" (6 cm)\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003e165 lbs stones required (5 boxes, 3-5 cm rounded olivine)\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eUKU controller required - sold separately\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eNo UKU Extension Box required for 6kW\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eMax temperature 230°F\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003e240V\/1PH - 30A - 10AWG\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eOptional Reflect C - halves clearances\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eOptional Rail C safety railing\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eOptional Flange CS bench embedding\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eSGS certified\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003e5-year limited warranty (excl. elements)\u003c\/span\u003e \u003cspan class=\"cf-badge\"\u003eDesigned and made in Estonia by HUUM\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"cf-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"cf-spec-grid\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e6 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel type\u003c\/td\u003e\n\u003ctd\u003eElectric (240V\/1PH)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e176 to 353 cu ft (5-10 m3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e165 lbs \/ 75 kg (5 boxes, 3-5 cm rounded olivine) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e3-5 cm rounded olivine (1-2 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct benefit\u003c\/td\u003e\n\u003ctd\u003eHeats up to 25% faster\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003eCLIFF cage and stone features\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCage design\u003c\/td\u003e\n\u003ctd\u003eOpen minimalist steel cage - stones visible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCage material origin\u003c\/td\u003e\n\u003ctd\u003eMade from recycled cutouts of STEEL heater manufacturing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemovable rib slats\u003c\/td\u003e\n\u003ctd\u003eYes - for precise and accurate stone stacking\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProp blocks included\u003c\/td\u003e\n\u003ctd\u003e2 prop blocks for rib slat removal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone visibility\u003c\/td\u003e\n\u003ctd\u003eOpen cage - full stone mass visible inside sauna\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003eSafety distances (combustible materials)\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSides (A)\u003c\/td\u003e\n\u003ctd\u003e2.36 in (6 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFront (B)\u003c\/td\u003e\n\u003ctd\u003e16.5 in (419 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith Reflect C panel\u003c\/td\u003e\n\u003ctd\u003eSide distances can be halved (optional accessory)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCLIFF 6 vs STEEL 6 side clearances\u003c\/td\u003e\n\u003ctd\u003eCLIFF 6: 2.36 in (6 cm) | STEEL 6: 2.0 in (5 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage \/ phase\u003c\/td\u003e\n\u003ctd\u003e240VAC, 1-phase, 60Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker\u003c\/td\u003e\n\u003ctd\u003e30A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire size\u003c\/td\u003e\n\u003ctd\u003e10AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required (only needed for 10.5kW+ models)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003ePhysical dimensions\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e10.6 in (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e6.3 in (160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eFloor-mounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDelivery\u003c\/td\u003e\n\u003ctd\u003eScheduled pallet freight - appointment required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003eCLIFF 6 vs STEEL 6 - dimension comparison\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight (both)\u003c\/td\u003e\n\u003ctd\u003e38.4 in (975 mm) - identical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth - CLIFF 6\u003c\/td\u003e\n\u003ctd\u003e10.6 in (270 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth - STEEL 6\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth - CLIFF 6\u003c\/td\u003e\n\u003ctd\u003e6.3 in (160 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth - STEEL 6\u003c\/td\u003e\n\u003ctd\u003e12.6 in (320 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity - CLIFF 6\u003c\/td\u003e\n\u003ctd\u003e165 lbs (5 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity - STEEL 6\u003c\/td\u003e\n\u003ctd\u003e330 lbs (10 boxes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCage design\u003c\/td\u003e\n\u003ctd\u003eCLIFF: open recycled-steel cage | STEEL: enclosed cavity\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003eController (required - sold separately)\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible controllers\u003c\/td\u003e\n\u003ctd\u003eUKU Local | UKU Wi-Fi | UKU Glass | UKU Mirror | UKU Gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local\u003c\/td\u003e\n\u003ctd\u003ePhysical panel - temperature, timer, safety features\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Wi-Fi\u003c\/td\u003e\n\u003ctd\u003ePhysical panel + HUUM mobile app remote control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU safety features\u003c\/td\u003e\n\u003ctd\u003eDoor sensor, overheating protection, child safety lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-spec-block\"\u003e\n\u003ch4\u003eCertifications, warranty, and optional accessories\u003c\/h4\u003e\n\u003ctable class=\"cf-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eSGS certified\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eDesigned and made in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty\u003c\/td\u003e\n\u003ctd\u003e5-year limited warranty (excluding elements)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety railing\u003c\/td\u003e\n\u003ctd\u003eRail C (CLIFF-specific, light wood profiles) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReflector panel\u003c\/td\u003e\n\u003ctd\u003eReflect C (CLIFF-specific, halves side clearances) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench embedding\u003c\/td\u003e\n\u003ctd\u003eFlange CS (CLIFF-specific) - sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"cf-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"cf-inc-grid\"\u003e\n\u003cdiv class=\"cf-inc-item\"\u003eHUUM CLIFF 6 6kW floor-mounted electric sauna heater with open recycled-steel cage\u003c\/div\u003e\n\u003cdiv class=\"cf-inc-item\"\u003e2 prop blocks for rib slat removal during stone loading\u003c\/div\u003e\n\u003cdiv class=\"cf-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003cdiv class=\"cf-inc-item\"\u003e5-year limited warranty (excluding elements)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eRequired (not included):\u003c\/strong\u003e 165 lbs sauna stones (5 boxes, 3-5 cm rounded olivine - an additional box is recommended); HUUM UKU controller (Local or Wi-Fi). No UKU Extension Box is required for the 6kW model. \u003cstrong\u003eOptional accessories (sold separately - CLIFF-specific):\u003c\/strong\u003e Rail C safety railing; Reflect C reflector panel (halves side clearances); Flange CS bench embedding. A licensed electrician is required for all wiring: 240V\/1PH, 30A circuit breaker, 10AWG wire.\u003c\/p\u003e\n\u003chr class=\"cf-divider\"\u003e\n\u003ch3\u003eWhy the HUUM CLIFF 6 stands out\u003c\/h3\u003e\n\u003cdiv class=\"cf-feat-grid\"\u003e\n\u003cdiv class=\"cf-feat\"\u003e\n\u003cdiv class=\"cf-feat-title\"\u003eRecycled steel cage - material story as design feature\u003c\/div\u003e\n\u003cp\u003eThe CLIFF cage is fabricated from the recycled cutouts produced during STEEL heater manufacturing. HUUM's own description of the intent: eliminating material waste to celebrate the nature that inspires the award-winning design. Every CLIFF in the market was made from material that would otherwise have been production scrap, and the cage structure makes this material origin visible. The open-cage format showcases the stones inside the sauna room rather than concealing them - the stones become a visual element of the sauna interior rather than a hidden functional component. For a buyer who cares about the material story of their heater alongside its performance, the CLIFF is the only HUUM heater with this specific provenance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-feat\"\u003e\n\u003cdiv class=\"cf-feat-title\"\u003eNarrowest floor heater in the HUUM lineup - 10.6\"W x 6.3\"D\u003c\/div\u003e\n\u003cp\u003eAt 10.6\" wide and 6.3\" deep, the CLIFF 6 is the narrowest and shallowest floor heater HUUM produces. The STEEL 6 is 12.6\" wide and 12.6\" deep - twice the depth and nearly 2\" wider. For a compact sauna room where the combination of heater width, depth, and side clearances directly determines how much bench space is available alongside the stove, the CLIFF 6 occupies the smallest floor area of any HUUM floor heater. The optional Reflect C reflector panel further reduces the side clearances from 2.36\" to approximately half, making the effective combined footprint even more compact in tight sauna layouts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-feat\"\u003e\n\u003cdiv class=\"cf-feat-title\"\u003eRemovable rib slats - better stone loading than any enclosed heater\u003c\/div\u003e\n\u003cp\u003eThe CLIFF's open cage with removable rib slats allows the stones to be loaded and stacked with precision that an enclosed heater cavity simply cannot offer. The rib slats can be individually removed using the included prop blocks, and stones can be arranged to minimize air gaps and maximize the stone-to-volume ratio within the cage. HUUM's description of the benefit: more accurate stacking of stones. A tighter stone arrangement with fewer air gaps produces more consistent heat distribution through the stone mass and more even steam production across the stone surface. Two prop blocks are included with every CLIFF 6 specifically for this purpose.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-feat\"\u003e\n\u003cdiv class=\"cf-feat-title\"\u003eAward-winning design - Estonian rock cliff aesthetic\u003c\/div\u003e\n\u003cp\u003eThe CLIFF's visual identity draws from Estonia's landscape - specifically from the vertical, striated profile of the country's distinctive limestone and sandstone cliff faces. The heater's tall, slim profile with visible structural lines is a direct translation of that landscape reference into a functional product. Authorized dealers describe the CLIFF as one of HUUM's most striking heaters in a sauna interior - and the award recognition the design has received reflects the combination of design discipline, material story, and functional simplicity that the CLIFF achieves. The open cage, visible stones, and slim profile make it a heater that is designed to be noticed as part of the sauna room rather than simply serving as a utilitarian appliance within it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-feat\"\u003e\n\u003cdiv class=\"cf-feat-title\"\u003e165 lbs of stones and 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe CLIFF 6 holds 165 lbs of rounded 3-5 cm olivine stones (5 boxes) in its open cage. The internal air duct channels air through the stone mass to increase heating speed by up to 25% versus heaters without an air tunnel. For a 6kW heater in a 176-353 cu ft room, both the stone capacity and the faster heat-up translate directly to session quality: 165 lbs of stones sustain consistent heat and steam through the full session, and the faster heat-up reduces the time from switch-on to bathing temperature. HUUM recommends rounded olivine stones in the CLIFF specifically to complement the open-cage design and produce the mildest, most pleasant steam quality from the visible stone mass.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-feat\"\u003e\n\u003cdiv class=\"cf-feat-title\"\u003eCLIFF Series - 6kW floor and CLIFF Mini 4kW wall models\u003c\/div\u003e\n\u003cp\u003eThe H1004012 is the 6kW floor-standing configuration of the HUUM CLIFF Series. The CLIFF Series also includes a CLIFF Mini (4kW, wall-mounted, for even smaller sauna rooms - HUUM describes it as an even slimmer model particularly suitable for very small sauna rooms). The CLIFF 9 and CLIFF 10.5 are larger output floor models for bigger rooms - those models require 9.45\" (24 cm) side clearances and the CLIFF 10.5 requires the UKU Extension Box. The CLIFF-specific optional accessories - Rail C safety railing, Reflect C reflector panel, and Flange CS bench embedding flange - are designed specifically for the CLIFF platform and differ from the equivalent STEEL accessories. Designed and made in Estonia by HUUM. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"cf-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"cf-brand1\" style=\"text-align: start;\"\u003e\n\u003cimg alt=\"HUUM CLIFF 6 H1004012 6kW floor electric sauna heater 176-353 cu ft 165 lbs stones open recycled cage 10.6 inch wide award-winning design\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-cliff-main_2c54bb37-1c24-4b23-9a54-f3d89db24269.jpg?v=1781681606\u0026amp;width=800\" class=\"cf-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"cf-brand-tag\"\u003eDesigned in Estonia - SGS Certified - CLIFF Series - Award-Winning Design\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF 6. 6kW. 176-353 cu ft. 10.6\"W x 6.3\"D. 165 lbs stones. Recycled open cage.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The CLIFF 6 is a 6kW floor heater with a minimalist open steel cage made from recycled STEEL heater cutouts - the narrowest floor heater in the HUUM lineup at 10.6\"W x 6.3\"D, with removable rib slats for precise stone stacking, 2.36\" side clearances, and an award-winning design inspired by Estonian rock cliffs. UKU controller and 165 lbs stones (5 boxes, 3-5 cm) required and sold separately. No UKU Extension Box required. Pallet delivery. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"cf-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e6kW electric\u003c\/strong\u003e - 176-353 cu ft - CLIFF Series narrowest floor heater\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10.6\"W x 6.3\"D\u003c\/strong\u003e - open recycled-steel cage - removable rib slats\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e165 lbs stones required (5 boxes, 3-5 cm)\u003c\/strong\u003e - internal air duct 25% faster\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2.36\" side clearances\u003c\/strong\u003e - award-winning Estonian rock cliff design\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUKU controller required (no Extension Box) - 30A - 10AWG - SGS certified\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-brand2\" style=\"text-align: start;\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"cf-brand-tag\"\u003eCLIFF 6 vs STEEL 6 vs STEEL Mini 4 - HUUM compact electric heater comparison\u003c\/span\u003e\n\u003ch4\u003eHUUM CLIFF 6 vs STEEL 6 vs STEEL Mini 4 - slim floor heater selection guide\u003c\/h4\u003e\n\u003cp\u003eThree compact HUUM electric heaters cover the small to medium home sauna range. HUUM STEEL Mini 4 H1007012: 3.5kW, 106-177 cu ft (adjusted), wall-mounted, 12.6\"W x 6\"D, 132 lbs stones (4 boxes, 3-5 cm), 2.5\" side clearances, 15A\/14AWG, open-air design. Right for the smallest sauna rooms with wall mounting. HUUM CLIFF 6 H1004012 (this listing): 6kW, 176-353 cu ft, floor-standing, 10.6\"W x 6.3\"D, 165 lbs stones (5 boxes, 3-5 cm), 2.36\" side clearances, open recycled-steel cage, removable rib slats, award-winning design, 30A\/10AWG. Right when the CLIFF's narrow floor footprint, open cage design, material story, and 6kW output for the 176-353 cu ft range are the specification. HUUM STEEL 6 H1006012: 6kW, 212-353 cu ft, floor-standing, 12.6\"W x 12.6\"D, 330 lbs stones (10 boxes, 3-5 cm), 2\" side clearances, enclosed cavity, 30A\/10AWG. Right when maximum stone capacity (330 lbs vs CLIFF's 165 lbs) and the square-pillar STEEL format are the priority at the same 6kW output. Choose the CLIFF 6 for the 176-353 cu ft range where the narrowest floor footprint, open cage, recycled material story, and CLIFF Series design are the right specification.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg alt=\"HUUM CLIFF 6 narrow open cage vs STEEL 6 enclosed cavity vs STEEL Mini 4 wall-mounted compact electric sauna heater comparison\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum-sauna-heater-huum-steel-6-kw-240v-electric-sauna-heater-1182030773.jpg?v=1781633979\u0026amp;width=800\" class=\"cf-brand-img\" style=\"margin-bottom: 16px; float: none;\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"cf-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"cf-manual\"\u003e\n\u003cdiv class=\"cf-manual-item\"\u003e\n\u003ch6\u003eInstallation and Operation Manual\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-CLIFF-Sauna-Heater-IOM.pdf\" class=\"cf-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" class=\"cf-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-manual-item\"\u003e\n\u003ch6\u003eElement Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Element-Requirements.pdf\" class=\"cf-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Element Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" class=\"cf-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-manual-item\"\u003e\n\u003ch6\u003eCertificate of Compliance\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2022-09\/HUUM%20Certificate%20of%20Compliance.pdf\" class=\"cf-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Certificate of Compliance (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"cf-manual-item\"\u003e\n\u003ch6\u003eSize Your Sauna\u003c\/h6\u003e\n\u003ca href=\"https:\/\/prod-cms.bathingbrands.com\/sites\/default\/files\/2025-09\/Sizing-Your-HUUM.pdf\" class=\"cf-doc-link\" target=\"_blank\"\u003e \u003csvg width=\"14\" height=\"14\" viewbox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Size Your Sauna (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"cf-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (excluding elements)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM CLIFF 6 carries HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use and maintenance conditions. Heating elements are excluded from the 5-year term and carry a separate warranty period per the warranty document. The warranty does not cover damage caused by improper installation, failure to follow the installation and operating guidelines, use of incorrect stone type or size (decorative stones must not be used as they can break under heat; use only rounded olivine 3-5 cm in the CLIFF 6), operating without the required stone load, or damage from inadequate electrical installation. HUUM recommends rounded olivine stones in the CLIFF to complement the open-cage design and achieve milder steam. Proof of purchase from an authorized HUUM dealer is required for warranty claims. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"240V\/1PH (Home Use)","offer_id":52364951453978,"sku":"H1004012","price":2347.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/huum-cliff-main_2c54bb37-1c24-4b23-9a54-f3d89db24269.jpg?v=1781681606"}],"url":"https:\/\/mediriser.com\/collections\/huum.oembed","provider":"Mediriser","version":"1.0","type":"link"}