The heater is the heart of your sauna - it sets the pace of your session, shapes the quality of the steam, and determines whether you're stepping into gentle warmth or deep, enveloping heat. LeisureCraft carries electric and wood-burning sauna heaters from Canadian-made and Finnish brands including Huum, Homecraft, Harvia and Narvi, sized for rooms from 100 to 1,150 cubic feet.