9.0 kW Heating Capacity: Designed for sauna rooms from 283 to 460 cubic feet.
Complete Heater Package: Combines the STEEL 9.0 kW heater, UKU control system, and 330 lb of sauna stones.
Slim Floor-Standing Design: The 12.6 × 12.6 in footprint provides a space-efficient solution for sauna layouts with limited floor space.
331 lb Stone Capacity: Accommodates a substantial stone mass within its tall, narrow stainless steel structure.
330 lb of Stones Included: Package includes 330 lb of 1–2 in (3–5 cm) rounded olivine diabase sauna stones.
Internal Air Duct: HUUM states that the internal air duct allows the STEEL series to heat up to 25% faster.
Direct Stone-to-Element Contact: Open construction positions the sauna stones directly around the heating elements.
Stainless Steel Construction: Built with stainless steel construction and industrial-quality stainless steel heating elements.
External UKU Control: Provides digital adjustment of power, operating time, temperature, and delayed start.
104–230°F Control Range: UKU specifications list an adjustable temperature range of 104°F to 230°F.
48-Hour Delayed Start: Allows sauna operation to be scheduled up to 48 hours in advance.
Wi-Fi Optional: Built-in Wi-Fi connectivity for the HUUM mobile app is available as an optional UKU upgrade.
Eight Language Options: Supports English, German, Russian, Italian, Finnish, Estonian, Polish, and French.
Safety Functions: Includes temperature and door sensors, overheat protection, and a child safety lock.
Made in Estonia: STEEL heater is designed, engineered, and manufactured in Estonia.