{"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","url":"https:\/\/mediriser.com\/products\/huum-cliff-11-cliff-series-11kw-sauna-heater","provider":"Mediriser","version":"1.0","type":"link"}