The Revive sauna heater is a sleek & modern, high end sauna heater designed to give a truly amazing sauna experience for every sauna user. The tower design holding up to 200 pounds of rocks with our inner air-flow chamber design allows for large amounts of water to be added to the heater creating large amounts of steam and increasing the humidity to the room. This beautiful heater was designed for the sauna user who desires that increased humidity and have a more wet-sauna experience. Heater can be purchased without rocks to save on shipping costs.