{"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; 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; 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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-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 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\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-CORE-Sauna-Heater-Package-Unfinished-Black-Local-Black-.jpg\" alt=\"HUUM CORE BK\/ST sauna heater package showing unfinished frame ready for custom tile, stone, glass or wood cladding\"\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 w\/Wood Case \/ Black \/ 6.5kW","offer_id":52218903068954,"sku":"129511","price":3415.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ Black \/ 9kW","offer_id":52218903101722,"sku":"129525","price":3535.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ Black \/ 10.5kW","offer_id":52218903134490,"sku":"129518","price":3670.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ Stainless Steel \/ 6.5kW","offer_id":52218903167258,"sku":"129504","price":3415.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ Stainless Steel \/ 9kW","offer_id":52218903200026,"sku":"129518","price":3535.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case \/ Stainless Steel \/ 10.5kW","offer_id":52218903232794,"sku":"129532","price":3670.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black \/ Black \/ 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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