{"product_id":"huum-steel-9-0stu-pkg-steel-series-9-0kw-sauna-heater-package","title":"HUUM STEEL 9.0STU Pkg STEEL Series 9.0kW Sauna Heater Package","description":"\u003cp\u003e\u003c!-- HUUM STEEL 9.0STU Package - 9kW Complete Floor-Standing Sauna Heater, Slim Stainless Tower --\u003e\u003c\/p\u003e\n\u003cp style=\"text-align: center;\"\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/0C2Nz-_r2pQ?si=RWRk12iHvghHmb6z\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003ch2\u003eHUUM STEEL 9.0STU Pkg STEEL Series 9.0kW Sauna Heater Package\u003c\/h2\u003e\n\u003c!-- Floor-standing | 240V\/1PH | 318-530 cu ft | Complete - control + 330 lbs stones included --\u003e\u003c!-- SKU: 534-BDL-STEEL90STULB | STEEL Series | UKU Local Black or UKU WiFi at checkout --\u003e\u003c!-- No UKU Extension Box required (9kW under 11kW threshold) | Air tunnel integrated --\u003e\u003c!-- Single 50A breaker \/ 8 AWG (heavier than STEEL 6's 30A \/ 10 AWG) --\u003e\u003c!-- 5-year warranty (elements excluded) | SGS Listed | Made in Estonia --\u003e\u003c!-- 8 document sections: STEEL IOM | STEEL Elements Required | UKU Installation and Operation Manual (singular) | UKU Diagram | UKU Video | Extension Installation Manual | Warranty | Stone Requirements --\u003e\n\u003cstyle\u003e\n  .sl { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; 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color: #0f172a !important; line-height: 1.7 !important; margin: 0; }\n  .sl-manual { background: #fff; border: 1px solid #e2e8f0; border-radius: 6px; padding: 1.25rem 1.5rem; margin-bottom: 1.5rem; }\n  .sl-manual-item { margin-bottom: 1.25rem; padding-bottom: 1.25rem; border-bottom: 1px solid #e2e8f0; }\n  .sl-manual-item:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: none; }\n  .sl-manual-item h6 { font-size: 14px; font-weight: 700 !important; color: #0f172a !important; margin: 0 0 0.5rem; }\n  .sl-doc-link { display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 500; color: #4a5568; background: #fff; border: 1px solid #d1d5db; border-radius: 5px; padding: 8px 14px; text-decoration: none; }\n  .sl-doc-link:hover { background: #e8f0fa; border-color: #bfd4ef; color: #2563a8; }\n  .sl-divider { border: none; border-top: 1px solid #e2e8f0; margin: 1.75rem 0; }\n  @media (max-width: 768px) {\n    .sl-feat-grid { grid-template-columns: 1fr 1fr; }\n    .sl-spec-grid { grid-template-columns: 1fr; gap: 1.5rem; }\n    .sl-brand1, .sl-brand2 { grid-template-columns: 1fr; gap: 1rem; padding: 1rem 0; }\n    .sl-brand2 { display: flex; flex-direction: column-reverse; }\n    .sl-brand1 h4, .sl-brand2 h4 { font-size: 18px !important; }\n  }\n  @media (max-width: 480px) {\n    .sl { padding: 0; }\n    .sl-feat-grid { grid-template-columns: 1fr; gap: 8px; }\n    .sl-feat { padding: 0.8rem 0.9rem; }\n    .sl-inc-grid { grid-template-columns: 1fr; }\n    .sl-spec-grid { gap: 1.25rem; }\n    .sl-spec-table, .sl-spec-table tbody, .sl-spec-table tr, .sl-spec-table td { display: block; width: 100%; }\n    .sl-spec-table { border: none; }\n    .sl-spec-table tr { border: 1px solid #e2e8f0; border-radius: 6px; margin-bottom: 6px; padding: 8px 12px; background: #fff !important; }\n    .sl-spec-table tr:nth-child(odd) { background: #f8fafc !important; }\n    .sl-spec-table td { border: none; padding: 1px 0; }\n    .sl-spec-table td:first-child { font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: #64748b; width: 100%; padding-bottom: 2px; }\n    .sl-spec-table td:last-child { font-size: 15px; font-weight: 700 !important; color: #0f172a !important; width: 100%; word-wrap: break-word; overflow-wrap: break-word; }\n    .sl-divider { margin: 1.25rem 0; }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"sl\"\u003e\n\u003cdiv class=\"sl-desc\"\u003e\n\u003cp\u003eThe HUUM STEEL 9.0STU Package is a complete sauna heater package for rooms from 318 to 530 cubic feet, including the STEEL 9kW floor-standing heater, UKU sauna control (Local Black or WiFi - selected at checkout), and 330 lbs of rounded olivine diabase sauna stones. The STEEL 9 steps up from the STEEL 6 with 50% more output for the same slender stainless steel tower body and the same 330-lb stone capacity, extending coverage into the 318-530 cu ft room range on a single 50A \/ 8 AWG circuit. No UKU Extension Box is required. The STEEL 9 is the correct choice for buyers in the 318-530 cu ft range who want a floor-standing slender stainless steel tower with 330 lbs of stone mass, minimal 4\" (10 cm) wall clearances, and an integrated air duct - on a single electrical circuit without dual-circuit complexity.\u003c\/p\u003e\n\u003ch4\u003eSTEEL 9 vs STEEL 6 - same body, more output, heavier circuit\u003c\/h4\u003e\n\u003cp\u003eThe STEEL 6 and STEEL 9 share identical body dimensions - the same slim rectangular stainless steel tower profile, the same 330-lb stone capacity, and the same integrated internal air duct. What changes is output level, room range, and electrical specification. The STEEL 6 covers 177-318 cu ft on a single 30A \/ 10 AWG circuit with 2\" (5 cm) wall clearances. The STEEL 9 covers 318-530 cu ft on a single 50A \/ 8 AWG circuit with 4\" (10 cm) wall clearances - slightly more than the 6kW model due to the higher output level, but still exceptionally minimal for a 9kW floor-standing heater. For rooms from 318 to 530 cu ft where a single-circuit 50A installation is available, the STEEL 9 is the directly matched output level. No dual-circuit wiring is needed, and no UKU Extension Box is required.\u003c\/p\u003e\n\u003ch4\u003e318-530 cu ft - mid-size sauna rooms in the STEEL tower form\u003c\/h4\u003e\n\u003cp\u003eThe 9kW room range covers mid-size dedicated home sauna rooms, two-bench sauna cabins, and smaller commercial installations. At this range, the STEEL 9's floor-standing format and minimal 4\" clearances are especially valuable in sauna rooms where bench positions leave limited space between the heater location and the walls - a common constraint in purpose-built sauna cabins where the bench wraps around three walls and the heater must fit into a corner or end position without violating safety distances. The STEEL's slim rectangular profile takes up less floor space than round floor-standing heaters like the HIVE Mini, and its 4\" wall clearance at 9kW is far less than the safety distances required by most comparable heaters at this output level.\u003c\/p\u003e\n\u003ch4\u003e330 lbs of stone, integrated air duct - the STEEL's consistent specification\u003c\/h4\u003e\n\u003cp\u003eLike the STEEL 6, the STEEL 9 carries 330 lbs of rounded olivine diabase stones in 2\"-4\" (5-10 cm) size - the correct specification for the STEEL basket geometry. All 10 boxes of stones included in this package are the right type and quantity for the STEEL 9. The integrated internal air duct reduces heat-up time by approximately 25% and extends element life by improving airflow through the stone mass during warm-up. The UKU Local Black control is included as standard; UKU WiFi is available at checkout for HUUM app remote preheat and scheduling on iOS and Android. The STEEL 9 does not require the UKU Extension Box - that component is only needed for the STEEL 10.5kW model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-hook\"\u003eComplete 9kW floor-standing sauna heater package for rooms from 318 to 530 cubic feet. Includes STEEL 9kW heater, UKU control (Local Black or WiFi - select at checkout), and 330 lbs of rounded olivine diabase stones (10 boxes). Same slim stainless steel tower body as STEEL 6 and 10.5 - 330 lbs stone capacity across all three. 4\" safety clearance from walls at 9kW. Integrated internal air duct - 25% faster heat-up, extended element life. No UKU Extension Box required. Single 50A breaker, 8 AWG wire. 240V \/ 1-phase. Adjustable legs. Bench-embedding possible. Max 230°F. SGS Listed. 5-year warranty (elements excluded). Made in Estonia by HUUM.\u003c\/div\u003e\n\u003cdiv class=\"sl-badges\"\u003e\n\u003cspan class=\"sl-badge\"\u003eComplete package - control + 330 lbs stones included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e9 kW\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e318 to 530 cu ft\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSlim stainless steel tower - same body as STEEL 6 and 10.5\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e4\" safety clearance from walls\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e330 lb stone capacity - 10 boxes included\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eNo UKU Extension Box required\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eUKU Local Black or UKU WiFi - select at checkout\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSingle 50A breaker - 8 AWG - 240V 1-phase\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003eSGS Listed - made in Estonia\u003c\/span\u003e \u003cspan class=\"sl-badge\"\u003e5-year warranty (elements excluded)\u003c\/span\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"sl-spec-grid\"\u003e\n\u003cdiv class=\"sl-spec-tables\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eElectrical\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower output\u003c\/td\u003e\n\u003ctd\u003e9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e240V \/ 1-phase \/ 60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmperage draw\u003c\/td\u003e\n\u003ctd\u003e37.5 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCircuit breaker required\u003c\/td\u003e\n\u003ctd\u003eSingle 50A (standard 2-pole - no GFI\/GFCI)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire gauge\u003c\/td\u003e\n\u003ctd\u003e8 AWG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box required\u003c\/td\u003e\n\u003ctd\u003eNo - not required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertification\u003c\/td\u003e\n\u003ctd\u003eSGS Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eRoom sizing and stones\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoom volume\u003c\/td\u003e\n\u003ctd\u003e318 to 530 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs (150 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStones included\u003c\/td\u003e\n\u003ctd\u003eYes - 10 boxes rounded olivine diabase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone size\u003c\/td\u003e\n\u003ctd\u003e2\" to 4\" (5-10 cm) rounded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax temperature\u003c\/td\u003e\n\u003ctd\u003e230°F (110°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003ePhysical and clearances\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProfile\u003c\/td\u003e\n\u003ctd\u003eSlim rectangular stainless steel tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety clearance from walls\u003c\/td\u003e\n\u003ctd\u003e4\" (10 cm) at 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor-standing with adjustable legs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBench-embedding\u003c\/td\u003e\n\u003ctd\u003ePossible - embedding flange sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAir duct\u003c\/td\u003e\n\u003ctd\u003eIntegrated internal - 25% faster heat-up\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConstruction\u003c\/td\u003e\n\u003ctd\u003eBrushed stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eMade in Estonia by HUUM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-image\"\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eControl options - select at checkout\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Local Black\u003c\/td\u003e\n\u003ctd\u003eWall-mounted digital control - on-site operation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU WiFi\u003c\/td\u003e\n\u003ctd\u003eAdds HUUM app remote preheat and scheduling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApp\u003c\/td\u003e\n\u003ctd\u003eHUUM app - iOS and Android (WiFi variant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUKU Extension Box\u003c\/td\u003e\n\u003ctd\u003eNot required for 9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eSTEEL series comparison\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 6kW\u003c\/td\u003e\n\u003ctd\u003e177-318 cu ft | 30A \/ 10 AWG | 2\" clearance | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 9kW (this listing)\u003c\/td\u003e\n\u003ctd\u003e318-530 cu ft | 50A \/ 8 AWG | 4\" clearance | No ext box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSTEEL 10.5kW\u003c\/td\u003e\n\u003ctd\u003e353-706 cu ft | 50A \/ 8 AWG | 4\" clearance | Ext box required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBody dimensions\u003c\/td\u003e\n\u003ctd\u003eIdentical across all three STEEL models\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStone capacity\u003c\/td\u003e\n\u003ctd\u003e330 lbs - identical across all three\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-spec-block\"\u003e\n\u003ch4\u003eWarranty\u003c\/h4\u003e\n\u003ctable class=\"sl-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWarranty period\u003c\/td\u003e\n\u003ctd\u003e5 years (elements excluded)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign\u003c\/td\u003e\n\u003ctd\u003eSlim brushed stainless steel tower\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cdiv class=\"sl-inc-grid\"\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eHUUM STEEL 9kW floor-standing sauna heater - brushed stainless steel tower\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eUKU sauna control (Local Black or WiFi - selected at checkout)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eRounded olivine diabase sauna stones - 10 boxes (330 lbs)\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eAdjustable legs\u003c\/div\u003e\n\u003cdiv class=\"sl-inc-item\"\u003eInstallation and operation manual\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp style=\"margin-top: 1rem; font-weight: 500; color: #64748b; font-size: 14px;\"\u003e\u003cstrong\u003eOptional accessories (sold separately):\u003c\/strong\u003e HUUM STEEL safety railing (recommended), STEEL embedding flange (for bench mounting), reflector panels (reduce wall clearances further). A licensed electrician is required for all electrical connections.\u003c\/p\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eWhy the HUUM STEEL 9.0STU Package stands out\u003c\/h3\u003e\n\u003cdiv class=\"sl-feat-grid\"\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e330 lbs of stone for 318-530 cu ft rooms\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 delivers 330 lbs of rounded olivine diabase stone mass for rooms from 318 to 530 cubic feet - the same stone capacity as the STEEL 6 for a meaningfully larger room range. More stone mass relative to output means softer, sustained steam and consistent bathing temperature through the session. For rooms in this range, the STEEL 9 is the maximum stone mass available without stepping up to a dual-circuit installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003e4\" from walls - fits tight sauna layouts\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 requires only 4\" (10 cm) safety clearance from surrounding walls - minimal for a 9kW floor-standing heater. In sauna rooms where bench positions or structural constraints limit the available space around the heater position, the STEEL's slim rectangular profile and small clearances allow placement that wider or more projecting heaters at this output level cannot achieve.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSame body as STEEL 6 and 10.5\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9 is physically identical to the STEEL 6 and STEEL 10.5 - same slim stainless tower profile, same 330-lb stone capacity, same adjustable legs, same embedded flange compatibility. The heater footprint and installation procedure are the same regardless of output level within the STEEL floor-standing series. More output for a larger room does not mean a larger heater.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eSingle circuit - no extension box\u003c\/div\u003e\n\u003cp\u003eThe STEEL 9kW operates on a single 50A \/ 8 AWG circuit with no UKU Extension Box. A single-circuit installation is simpler to plan and wire than the dual-circuit configuration of the HIVE 12kW and above. The UKU Extension Box is only required for the STEEL 10.5kW. For rooms from 318-530 cu ft, the STEEL 9 achieves full output on a single standard electrical circuit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eIntegrated air duct - 25% faster heat-up\u003c\/div\u003e\n\u003cp\u003eThe integrated internal air duct reduces heat-up time by approximately 25% and extends element life. For a 318-530 cu ft room at 9kW, the time saving is meaningful - particularly for regular sauna users and light commercial installations where session frequency makes warm-up time a practical consideration. Elements also last longer when airflow is optimised through the stone mass from the start of each cycle.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-feat\"\u003e\n\u003cdiv class=\"sl-feat-title\"\u003eUKU WiFi - remote preheat for a mid-size sauna\u003c\/div\u003e\n\u003cp\u003eA 318-530 cu ft room at 9kW takes 30-45 minutes to reach bathing temperature. Upgrading to UKU WiFi at checkout adds HUUM app control - start the preheat before leaving work, set a recurring weekly schedule, and monitor temperature remotely. No extension box is required. The WiFi upgrade connects directly to the UKU control without additional hardware for the 9kW model.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eAbout HUUM\u003c\/h3\u003e\n\u003cdiv class=\"sl-brand1\"\u003e\n\u003cimg class=\"sl-brand-img\" src=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-11\/SteelPKG1.jpg\" alt=\"HUUM STEEL 9kW floor-standing sauna heater package with UKU control and 330 lbs olivine stones - slim stainless steel tower\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eMade in Estonia - SGS Listed\u003c\/span\u003e\n\u003ch4\u003eHUUM STEEL 9STU. 9kW. 318-530 cu ft. 330 lbs of stone. Slim tower. 4\" from the wall. Single 50A circuit.\u003c\/h4\u003e\n\u003cp\u003eHUUM is an Estonian sauna heater company. The STEEL 9STU Package steps up from the STEEL 6 with 50% more output in the same slim stainless tower body for rooms from 318 to 530 cubic feet. The package includes the STEEL 9kW heater with integrated air duct, the UKU control (Local Black or WiFi at checkout), and 10 boxes of rounded olivine diabase stones (330 lbs). No UKU Extension Box required. Single 50A \/ 8 AWG circuit. 4\" safety clearance from walls. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003cul class=\"sl-check\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete package\u003c\/strong\u003e - STEEL 9kW, UKU control, and 330 lbs rounded olivine stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9kW, 318-530 cu ft\u003c\/strong\u003e - single 50A \/ 8 AWG, 240V\/1PH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame slim tower body\u003c\/strong\u003e as STEEL 6 and 10.5 - 330 lbs stone capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo UKU Extension Box required\u003c\/strong\u003e - single-circuit installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4\" from walls\u003c\/strong\u003e - 5-year warranty (elements excluded)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"text-align: start;\" class=\"sl-brand2\"\u003e\n\u003cdiv\u003e\n\u003cspan class=\"sl-brand-tag\"\u003eSTEEL 6 vs 9 vs 10.5 - choosing the right output\u003c\/span\u003e\n\u003ch4\u003eWhich STEEL floor-standing model is right - 6kW, 9kW, or 10.5kW?\u003c\/h4\u003e\n\u003cp\u003eAll three floor-standing STEEL models share the same slim stainless tower, 330-lb stone capacity, integrated air duct, and adjustable legs. STEEL 6kW: 177-318 cu ft, single 30A \/ 10 AWG, 2\" wall clearance, no extension box. STEEL 9kW: 318-530 cu ft, single 50A \/ 8 AWG, 4\" wall clearance, no extension box. STEEL 10.5kW: 353-706 cu ft, single 50A \/ 8 AWG, 4\" wall clearance, UKU Extension Box required (included in that package). The 9 and 10.5 share the same electrical specification - the difference between them is room size and the extension box requirement. For rooms below 354 cu ft with standard insulation, the 9kW is the correct and more efficiently sized choice. For rooms from 531-706 cu ft or rooms with significant cold surfaces pushing adjusted footage above 530, the 10.5kW is required. A licensed electrician is required for all installations. No GFI\/GFCI. STEEL safety railing recommended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cimg style=\"margin-bottom: 16px; float: none;\" class=\"sl-brand-img\" src=\"https:\/\/mediriser.com\/cdn\/shop\/files\/huum_uku1_1_28d85d78-f4c9-4671-a5cc-3ba0ce923a07.jpg?v=1779377905\u0026amp;width=800\" alt=\"HUUM STEEL 9kW slim stainless tower showing same profile as 6kW and 10.5kW models with 50A electrical specification\"\u003e\n\u003c\/div\u003e\n\u003chr class=\"sl-divider\"\u003e\n\u003ch3\u003eManuals and Documents\u003c\/h3\u003e\n\u003cdiv class=\"sl-manual\"\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-11\/HUUM-STEEL-Sauna-Heater-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM STEEL Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eSTEEL Elements Required\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-03\/HUUM%20Elements%20Required.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e HUUM STEEL Elements Required (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation and Operation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/HUUM-UKU-Control-IOM.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation and Operation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eUKU Installation Diagram\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-05\/HUUM-UKU-Installation-Diagram.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e UKU Installation Diagram (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eExtension Installation Manual\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2022-01\/Extension-Box-Installation.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Extension Installation Manual (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eWarranty\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-09\/HUUM-Warranty.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Warranty Information (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"sl-manual-item\"\u003e\n\u003ch6\u003eStone Requirements\u003c\/h6\u003e\n\u003ca class=\"sl-doc-link\" href=\"https:\/\/prod.cms.bathingbrands.com\/sites\/default\/files\/2025-12\/-HUUM-Stone-Requirements.pdf\" target=\"_blank\"\u003e \u003csvg stroke-width=\"2\" stroke=\"currentColor\" fill=\"none\" viewbox=\"0 0 24 24\" height=\"14\" width=\"14\"\u003e\u003cpath d=\"M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z\"\u003e\u003c\/path\u003e\u003cpolyline points=\"14 2 14 8 20 8\"\u003e\u003c\/polyline\u003e\u003c\/svg\u003e Stone Requirements (PDF) \u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cdiv class=\"sl-warranty\"\u003e\n\u003ch5\u003e5-year limited warranty (elements excluded)\u003c\/h5\u003e\n\u003cp\u003eThe HUUM STEEL 9.0STU Package is covered by HUUM's \u003cstrong\u003e5-year limited warranty\u003c\/strong\u003e from the date of purchase. The warranty covers defects in manufacturing and materials under normal use conditions. Heating elements are excluded from the 5-year coverage and carry their own separate warranty period. The warranty does not cover damage caused by improper installation, use of incorrect or non-approved stones, operating the heater without the required stone load, or failure to follow HUUM's installation and operating guidelines. A licensed electrician is required for all electrical connections. Do not connect to a GFI\/GFCI breaker. Proof of purchase from an authorized HUUM dealer is required. We are an authorized HUUM dealer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"HUUM","offers":[{"title":"UKU Local Black","offer_id":52264457699610,"sku":"534-BDL-STEEL90STULB","price":4086.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/Wood Case","offer_id":52264457732378,"sku":"534-BDL-STEEL90STULB+WD","price":4191.0,"currency_code":"USD","in_stock":true},{"title":"UKU Local w\/White Case","offer_id":52264457765146,"sku":"534-BDL-STEEL90STULB+WH","price":4102.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Black","offer_id":52264457797914,"sku":"534-BDL-STEEL90STUWB","price":4348.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/Wood Case","offer_id":52264457830682,"sku":"534-BDL-STEEL90STUWB+WD","price":4609.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi w\/White Case","offer_id":52264457863450,"sku":"534-BDL-STEEL90STUWB+WH","price":4428.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Gold","offer_id":52264457896218,"sku":"534-BDL-STEEL90STUWGD","price":4523.0,"currency_code":"USD","in_stock":true},{"title":"UKU Wifi Glass","offer_id":52264457928986,"sku":"H2004032","price":4748.0,"currency_code":"USD","in_stock":true},{"title":"UKU WIfi Mirror","offer_id":52264457961754,"sku":"534-BDL-STEEL90STUWMR","price":5011.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/1690\/0634\/files\/SteelPKG1.jpg?v=1779381989","url":"https:\/\/mediriser.com\/products\/huum-steel-9-0stu-pkg-steel-series-9-0kw-sauna-heater-package","provider":"Mediriser","version":"1.0","type":"link"}