{"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; 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 #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 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","url":"https:\/\/mediriser.com\/products\/huum-steel-9-steel-series-9-0kw-sauna-heater","provider":"Mediriser","version":"1.0","type":"link"}