HUUM STEEL Mini 4 Series 3.5kW Sauna Heater
HUUM STEEL Mini Electric Sauna Heater – 3.5 kW
Modern style meets compact performance with the HUUM STEEL Mini. This wall-mounted electric sauna heater brings a powerful and efficient heating experience to small sauna rooms, all while showcasing HUUM’s signature minimalist design. Made in Estonia with high-quality stainless steel and thoughtful engineering, the STEEL Mini delivers luxurious, long-lasting steam in spaces where every inch counts.
Engineered for Small Saunas, Built to Impress
Perfect for home or apartment saunas ranging from 123 to 212 cubic feet (3.5 to 6 m³), the STEEL Mini features extremely short safety distances, making it ideal for tight spaces. Despite its sleek design, it holds up to 132.3 lbs (60 kg) of sauna stones—far more than other heaters of the same power rating—delivering mild, consistent heat and rich löyly (steam).
Faster Heat, Cleaner Design
Thanks to an integrated air tunnel system, this compact heater heats the sauna up to 25% faster while extending the life of its heating elements. Its exposed stone surface and direct contact with heating elements ensure better steam generation and a gentler, more pleasant sauna experience. The polished stainless steel body also makes it a stunning addition to any sauna interior.
Smart Sauna Controls
The STEEL Mini is compatible with the HUUM UKU control system (sold separately), allowing you to control your sauna via a wall-mounted unit or remotely with the HUUM mobile app. Whether you’re at home or on the go, you can preheat your sauna to the perfect temperature with ease.
Key Features
- Designed for sauna rooms from 123 to 212 cu. ft. (3.5 to 6 m³)
- Wall-mounted design for space efficiency
- Extremely short safety distances (ideal for small saunas)
- Heats up to 25% faster with internal air tunnel
- Large 132.3 lb (60 kg) stone capacity for soft, lasting steam
- Direct contact between stones and heating elements
- Durable stainless steel body and industrial-grade heating elements
- Contemporary, minimalist design
- Compatible with HUUM UKU controls and mobile app
- Made in Estonia
- 5-Year Limited Warranty (excluding heating elements)
Technical Specifications
| Specification | 208V Model | 240V Model |
|---|---|---|
| Power Rating | 2.85 kW | 3.5 kW |
| Recommended Sauna Size | 106 – 159 ft³ (3 – 4.5 m³) | 106 – 177 ft³ (3 – 5 m³) |
| Stone Capacity | 132.3 lbs (60 kg) | |
| Heater Weight | 31.9 lbs (14.5 kg) | |
| Dimensions (W x D x H) | 12.2" x 6.3" x 38.4" (310mm x 160mm x 975mm) | |
| Installation Type | Wall-Mounted | |
| Material | Stainless Steel | |
| Control System | Compatible with HUUM UKU (Wi-Fi, Local, or Glass) | |
| Warranty | 5-Year Limited (Excludes Heating Elements) | |
In the Box
The HUUM STEEL Mini sauna heater comes with the heater body and mounting hardware. Control unit and sauna stones (4 boxes recommended) are sold separately.
Why Choose HUUM STEEL Mini?
If you’re looking for a sauna heater that blends powerful performance with elegant design, the HUUM STEEL Mini is a top-tier choice. With faster heating, sleek aesthetics, and industry-leading rock capacity, it's the perfect solution for compact modern saunas.
Safety Distances
A 2 in
B. 16.1 in
Download Steel Mini Sauna Heater Installation and Operational Manual
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