The compact HUUM STEEL Mini 3.5 kW sauna heater 240 V with exceptionally short safety distances is a wall-mounted model that is especially suited for smaller sauna rooms dispersing wet or dry heat. The STEEL Mini sauna heater is designed for sauna spaces up to 212 cubic feet (CF). The HUUM STEEL Mini has an exceptionally large rock capacity compared with other heaters in this power range resulting in a more consistent heat more steam capability and a superior bathing experience.