

Sauna Company USA · Heater · Unit Only
HUUM STEEL
The HUUM STEEL is a traditionally styled, high-grade stainless-steel heater. This listing is the STEEL heater unit only — sauna stones and a compatible UKU control unit required to operate and sold separately.
Select Your Size ↓Heater unit only — not ready to run out of the box
This is the bare STEEL heater. To operate a sauna it requires sauna stones and a compatible UKU control unit, both sold separately. Want it ready on day one? Shop the STEEL Full Package →
Every Detail
Specifications & Details
Specifications
Models: STEEL Mini (3.5 kW) · STEEL 6STU (6 kW) · STEEL 9STU (9 kW) · STEEL 11STU (10.5 kW)
All models: 240V single-phase · Floor-standing · control sold separately · Olivine diabase stones · Made in Estonia
What's Included
- HUUM STEEL Heater (your selected kW)
- Mounting & leveling hardware
- Installation Manual
- Limited Residential Warranty
Not included (sold separately): sauna stones and a compatible UKU control unit.
Compatibility & Sizing
Size at 1 kW per 45 cu ft. The STEEL suits traditional, barrel, and cabin saunas. Outdoor or glass-heavy rooms need the next size up.
Shipping & Warranty
Shipping: Freight carrier, curbside delivery.
Warranty: 3-year limited residential / 1-year commercial (elements excluded).
Title
Questions? Use the heater sizing guide or contact our team.
Returns & Refunds
30-Day Return Policy
We accept returns on this product within 30 days of delivery. To initiate a return, email info@saunacompanyusa.com with your order number.
Shipping Damage — If the return is required due to damage, include photos of the damage and note whether shipping damage was recorded upon signing for delivery. Shipping costs are fully covered for carrier-caused damage.
No-Damage Returns — No restocking fee is charged. You will be issued a credit for the full amount paid, less any required new boxing fees of approximately $20–$50 depending on the product.
Damaged Product — If the product is damaged, you will be notified to file a claim with your shipper. We assist throughout the process.
View our full Return Policy for complete details.


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HUUM STEEL Sauna Heater (Unit Only)
Overview
This listing is for the HUUM STEEL heater unit only. The STEEL is a classic cylindrical heater in high-grade stainless steel, sized from compact rooms to large saunas.
- Traditional cylindrical design
- High-grade stainless steel
- 3.5–10.5 kW range
- 240V single-phase
- Works with all HUUM UKU controls
Required to operate (sold separately): sauna stones and a compatible UKU control unit. See the warning above.
Key Features
HUUM STEEL Heater (Unit Only)
- Traditional cylindrical design
- High-grade stainless steel
- 3.5–10.5 kW range
- 240V single-phase
- Works with all HUUM UKU controls
Sold separately (required):
- Uku control unit
- Full sauna stone load
Shipping to Alaska, Hawaii, or Puerto Rico?

About the HUUM STEEL
Industrial power, clean form
The HUUM STEEL is the workhorse of the HUUM lineup. Its stainless grid column holds a large stone load with direct element contact — delivering steady, enveloping heat for traditional sauna rooms that demand consistent performance. Floor-standing and bold, the STEEL suits larger spaces where output and stone volume matter most. All models pair with HUUM's UKU control suite for precise temperature and scheduling.
Resources
Documents & Manuals
Installation & User Manual
Returns & Refunds
30-Day Return Policy
We accept returns on this product within 30 days of delivery. To initiate a return, email info@saunacompanyusa.com with your order number.
Shipping Damage — If the return is required due to damage, include photos of the damage and note whether shipping damage was recorded upon signing for delivery. Shipping costs are fully covered for carrier-caused damage.
No-Damage Returns — No restocking fee is charged. You will be issued a credit for the full amount paid, less any required new boxing fees of approximately $20–$50 depending on the product.
Damaged Product — If the product is damaged, you will be notified to file a claim with your shipper. We assist throughout the process.
View our full Return Policy for complete details.
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