HUUM Steel 10.5 kW Compact Wall-Mounted Electric Sauna Heater

The HUUM Steel is an enhanced version of the HUUM Steel Mini, developed to deliver stronger performance in medium-sized sauna rooms. Offered in 6 kW, 9 kW, and 10.5 kW options, it combines a clean, modern design with efficient heating, making it a practical choice for users who value both performance and visual simplicity.

With a substantial 150 kg (331 lbs) stone capacity—equivalent to 10 boxes of HUUM stones—the Steel heater provides steady heat retention and consistent steam output. Its slim, rectangular shape allows installation in more compact layouts while maintaining HUUM’s recognizable design, making it suitable for both residential and commercial sauna settings.

Efficient Heating with Air Tunnel Technology

A key feature of the HUUM Steel is its integrated air tunnel system, which protects the heating elements and improves airflow throughout the heater.
This design helps:

• Reduce heat-up time

• Improve overall energy efficiency

• Extend the service life of the heating elements

This air tunnel construction is shared only with the HUUM Cliff, placing both models at the top end of HUUM’s technical range.

Performance and Control

The Steel heater is compatible with the HUUM UKU control system, allowing Wi-Fi operation and remote scheduling when paired with the appropriate controller. Like all HUUM heaters, it operates at temperatures of up to 110°C, delivering even heat and producing smooth, consistent steam when water is poured over the stones.

What’s Included

• Adjustable legs (can raise the heater up to 7 cm)

What You’ll Need

• UKU sauna control system

• 150 kg (331 lbs) of sauna stones (diameter: 3–5 cm / 1.2–2 in)

Details

• Sauna room size: 10–16 m³ (354–566 ft³)

• Stone capacity: 150 kg (331 lb)

• Weight: 16 kg (35.3 lb)

• Height: 975 mm (38.4 in)

• Width: 320 mm (12.6 in)

• Depth: 320 mm (12.6 in)

• Maximum temperature: 110°C

• Safety distances: Refer to the Drawing tab below

Please note: Electrical installation is not included. For safety and compliance, all electrical work should be carried out by a licensed electrician, following local electrical codes and the manufacturer’s installation guidelines.