HUUM Steel Mini 3.5 kW Electric Sauna Heater
Upgrade your home sauna with the HUUM Steel Mini 3.5 kW Electric Sauna Heater, a premium wall-mounted electric sauna heater designed specifically for compact sauna spaces. Combining elegant Scandinavian design, innovative engineering, and exceptional heating performance, the HUUM Steel Mini 3.5 kW Electric Sauna Heater delivers a luxurious sauna experience while occupying minimal space. Manufactured in Estonia using premium stainless steel, this heater is ideal for sauna rooms ranging from 124 to 212 cubic feet (3.5–6 m³).
With its impressive 132 lb (60 kg) stone capacity, ultra-short safety distances, and compatibility with HUUM’s advanced UKU control systems, the HUUM Steel Mini 3.5 kW Electric Sauna Heater provides soft, long-lasting steam and efficient heating for modern residential saunas.
Why Choose the HUUM Steel Mini 3.5 kW Electric Sauna Heater?
The HUUM Steel Mini 3.5 kW Electric Sauna Heater has been engineered for homeowners who want professional sauna performance without sacrificing valuable space. Its slim wall-mounted profile and minimalist design make it an excellent choice for smaller sauna rooms while maintaining the authentic steam quality HUUM is known for.
Unlike traditional compact heaters, the HUUM Steel Mini 3.5 kW Electric Sauna Heater features a generous stone capacity that produces gentle, consistent heat and rich steam for a relaxing Finnish sauna experience.
Benefits include:
- Compact wall-mounted installation
- Elegant Scandinavian design
- Premium stainless steel construction
- Large 132 lb stone capacity
- Fast heating technology
- Soft, long-lasting steam
- Smart UKU control compatibility
- 5-Year Manufacturer Warranty
Compact Design for Small Sauna Rooms
One of the standout features of the HUUM Steel Mini 3.5 kW Electric Sauna Heater is its exceptionally slim design.
Designed specifically for smaller residential saunas, the heater measures only:
- Width: 12.6 inches
- Depth: 6 inches
- Height: 38.4 inches
Its narrow profile allows it to fit into compact sauna layouts without compromising performance or comfort.
Extremely Short Safety Distances
The HUUM Steel Mini 3.5 kW Electric Sauna Heater is engineered with one of the industry’s smallest required safety clearances.
Safety distances include:
- Side Clearance (A): 2.5 inches (5 cm)
- Front Clearance (B): 15.5 inches
These compact clearances allow greater flexibility when designing smaller sauna rooms while maximizing interior space.
Large 132 lb Stone Capacity
Despite its compact size, the HUUM Steel Mini 3.5 kW Electric Sauna Heater accommodates up to 132 pounds (60 kg) of sauna stones.
This generous stone capacity delivers several important benefits:
- Softer steam
- More consistent temperatures
- Longer heat retention
- Improved humidity
- Authentic Finnish sauna experience
The open stone basket design allows water to reach more heated stones, producing smooth and enjoyable steam with every pour.
Premium Stainless Steel Construction
The HUUM Steel Mini 3.5 kW Electric Sauna Heater is built using premium-grade stainless steel for outstanding durability and long-lasting performance.
Construction highlights include:
- Corrosion-resistant stainless steel body
- Industrial-grade heating elements
- Modern brushed finish
- Precision engineering
- Durable wall-mount design
Every heater is handcrafted in Estonia to meet strict European quality standards.
Faster Heating Performance
Thanks to its innovative internal air duct system, the HUUM Steel Mini 3.5 kW Electric Sauna Heater heats your sauna up to 25% faster than many conventional electric sauna heaters.
Advantages include:
- Reduced preheating time
- Improved airflow
- Greater energy efficiency
- Even heat circulation
- Lower operating costs
The direct contact between the heating elements and sauna stones further enhances heating performance and efficiency.
Perfect for Home Saunas
The HUUM Steel Mini 3.5 kW Electric Sauna Heater is designed for sauna rooms measuring:
- Minimum: 124 cubic feet (3.5 m³)
- Maximum: 212 cubic feet (6 m³)
Ideal applications include:
- Indoor home saunas
- Compact wellness rooms
- Apartment saunas
- Backyard sauna cabins
- Small luxury spas
- Personal relaxation spaces
Its 3.5 kW output provides reliable, efficient heating while maintaining comfortable temperatures throughout your sauna session.
Smart HUUM UKU Controls
Take complete control of your sauna experience with HUUM’s advanced UKU control systems.
Choose from:
UKU Local Control
Simple, stylish wall-mounted controller available in multiple finishes, including thermo-treated ash wood.
UKU WiFi Control
Operate your HUUM Steel Mini 3.5 kW Electric Sauna Heater remotely using your smartphone. Preheat your sauna before arriving home, adjust settings remotely, and monitor your sauna from virtually anywhere.
UKU Glass Control
A premium glass touchscreen controller with integrated WiFi that combines elegant design with smart functionality.
Features include:
- Temperature adjustment
- Heating schedules
- Lighting control
- Safety monitoring
- Remote access (WiFi models)
Superior Sauna Experience
The HUUM Steel Mini 3.5 kW Electric Sauna Heater delivers a traditional sauna experience with smooth, comfortable steam and balanced heat.
The large stone reservoir allows users to pour water over the stones to create:
- Gentle steam (löyly)
- Comfortable humidity
- Even temperatures
- Long-lasting warmth
- Relaxing sauna sessions
Whether you enjoy dry heat or humid steam, this heater offers exceptional versatility.
Sauna Stones Recommendation
Sauna stones are sold separately.
HUUM recommends rounded Olivine Diabase sauna stones (1–2 inches / 3–5 cm) because they provide:
- Excellent heat retention
- Superior durability
- Smooth steam production
- Attractive appearance
- Long service life
Decorative stones should never be used because they may crack under high temperatures.
What’s Included
Your HUUM Steel Mini 3.5 kW Electric Sauna Heater package includes:
- HUUM Steel Mini 3.5 kW Electric Sauna Heater
- Wall Mount Bracket
- Installation Hardware
- Installation Manual
Optional accessories include:
- UKU Local Control
- UKU WiFi Control
- UKU Glass Control
- Premium Sauna Stones
Technical Specifications
| Specification | Details |
|---|---|
| Model | Steel Mini 3.5 |
| Power Output | 3.5 kW |
| Sauna Room Size | 124–212 ft³ (3.5–6 m³) |
| Stone Capacity | 132 lbs (60 kg) |
| Installation | Wall Mounted |
| Construction | Stainless Steel |
| Voltage | 240V |
| Phase | Single Phase |
| Amperage | 15A |
| Circuit Breaker | 15A |
| Wire Size | 14 AWG |
| Width | 12.6″ |
| Depth | 6″ |
| Height | 38.4″ |
| Side Clearance | 2.5″ |
| Front Clearance | 15.5″ |
Precision Crafted in Estonia
Every HUUM Steel Mini 3.5 kW Electric Sauna Heater is designed and manufactured in Estonia using advanced engineering and premium materials. HUUM has earned an international reputation for creating beautifully designed sauna heaters that combine modern technology with authentic Nordic sauna traditions.
5-Year Manufacturer Warranty
Your investment is protected by HUUM’s 5-Year Limited Manufacturer Warranty, covering defects in materials and workmanship under normal residential use. The heater is fully serviceable, ensuring years of dependable performance and peace of mind.
Why Buy the HUUM Steel Mini 3.5 kW Electric Sauna Heater?
The HUUM Steel Mini 3.5 kW Electric Sauna Heater is the perfect solution for homeowners seeking premium sauna performance in a compact package. Its minimalist design, large stone capacity, fast heating technology, WiFi compatibility, and premium stainless steel construction make it one of the best compact electric sauna heaters available today.
Whether you’re installing a new sauna or upgrading an existing one, the HUUM Steel Mini 3.5 kW Electric Sauna Heater delivers exceptional comfort, reliable performance, and authentic Finnish sauna experiences for years to come.
Useful Resources
For additional information about the HUUM Steel Mini 3.5 kW Electric Sauna Heater, please refer to:
- HUUM Steel Installation & Operation Manual
- HUUM UKU Installation & Wiring Diagram
- HUUM Heater Maintenance Guide
- Stone Installation Guide
- HUUM Warranty Information
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