Saunum Air L 15Air L Series, 15. 2kW Sauna Heater w Climate Equalizer, Black Revolutionary Air Mixing Technology No more cold feet! No other sauna heater has Saunum's patented air blending system, which mixes cooler, oxygen rich air from the floor with hot, oxygen poor air off the ceiling and distributes it throughout the room for a more even temperature and better breathability. Saunum ensures that heat and oxygen are more consistent from head to toe. Scandinavian