Revolutionary Air Mixing Technology- No more cold feet! Saunum's patented air blending system mixes cooler, oxygen-rich air from the floor with hot, oxygen-poor air from the ceiling, distributing it evenly throughout the sauna. This ensures a more consistent temperature and better breathability from head to toe. Scandinavian Design- Finished in elegant stainless steel, Saunum combines contemporary Scandinavian aesthetics with premium-quality materials. Massive Stone Capacity- The Air L features a massive 198-pound stone capacity (6 boxes required, sold separately), delivering softer, more even heat and enhanced steam for an authentic Nordic sauna experience. Himalayan Salt Reservoir- Integrated Himalayan Salt Spheres are placed in the air stream to effectively disperse health-boosting salt ions throughout the sauna. Designed for sauna rooms from317 to 565 cu. ft. UL-listedfor safety and compliance. Note:Required control and sauna stones (198 lbs / 6 boxes) sold separately.