HUUM Steel Mini 3.5 Sauna Heater – 3.5kW
Elegant & Long-Lasting Steam, Perfect for Smaller Saunas
The HUUM Steel Mini 3.5 is a slim, wall-mounted electric sauna heater designed for compact home sauna rooms from 124 to 212 cubic feet. With safety distances as short as 2.5 inches, this heater is an excellent choice for saunas with limited space.
Despite its compact size, the Steel Mini can hold up to 132 pounds of sauna stones, producing a soft, consistent heat for both wet and dry sauna use. Its stones are placed in direct contact with the stainless-steel heating elements, ensuring efficient heat transfer and long-lasting steam.
Crafted in Estonia, the HUUM Steel Mini combines sleek, minimalist design with industrial-grade durability. All HUUM heaters are SGS Listed for safety, fully serviceable, and backed by a 5-year limited warranty (excluding elements).
Key Features
-
Slim stainless-steel construction
-
High stone capacity – 132 lbs (60 kg)
-
Heats 25% faster with integrated air duct
-
Wall-mounted installation with external control
-
Compact design: 12.6" W × 6" D × 38.4" H (320 × 152 × 975 mm)
-
Designed, engineered, and made in Estonia
-
Limited 5-year warranty (excluding elements)
Performance
-
Power: 3.5 kW
-
Sauna size: 124 – 212 cu. ft. (3.5 – 6 m³)
-
Voltage: 240V, single-phase (1PH)
-
Amperage: 15A
-
Circuit breaker: 15A
-
Wire size: 14 AWG
-
Safety distances: A = 2.5", B = 15.5"
Controls
-
Requires HUUM UKU control unit (sold separately)
-
Options: UKU Local, UKU Wi-Fi, UKU Glass Wi-Fi
-
Manage temperature, timers, steam, and lighting
-
Wi-Fi controls allow remote operation via the HUUM mobile app
Sauna Stones
-
Stones are not included
-
Recommended: rounded olivine diabase stones (3–5 cm)
-
Rounded stones enhance heater performance and provide milder steam
-
Decorative stones are not recommended as they may crack under heat
Package Contents
