{"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 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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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\"\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 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\"\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:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-11\/CliffPKG1.jpg\" 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 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:\/\/www.bathingbrands.com\/57676\/huum\/cliff-6stu\/sauna-heater-kits\" 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\/2025-09\/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 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":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 Local w\/White Case","offer_id":52278511075610,"sku":"534-BDL-CLIFF90STULB+WH","price":4180.0,"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 w\/White Case","offer_id":52278511173914,"sku":"534-BDL-CLIFF90STUWB+WH","price":4442.0,"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":null,"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","url":"https:\/\/mediriser.com\/products\/huum-cliff-9stu-pkg-cliff-series-9kw-sauna-heater-package","provider":"Mediriser","version":"1.0","type":"link"}