The Altostratus heaters are designed with the balance of stainless steel and Finnish soapstones in mind.Altostratus heaters are easy to install and stand on the floor with an adjustable leg support. They are designed to withstand intense heat and can hold up to 100kg of sauna stones. Altostratus heaters are available as different models: Altostratus (9 kW, 10,5 kW and 12 kW), Super Altostratus (15 kW and 18 kW) and Super Altostratus V12 (18 kW, 21 kW and 24 kW).