HIVE Heat 12 is a highly efficient wood-burning sauna stove for smaller saunas from 212 to 459 cubic feet. It has a unique structure where fresh air is directed into the burning process from above to create a stronger flame. This allows exceptionally clean burning so that no wood gas escapes the chimney as it does with less efficient stoves. The furnace door is made of cast iron for extreme durability and easy maintenance. HIVE Heat complies with BimSchV II, the strict German standard for wood-burning stoves, to ensure safety and quality. The HIVE Heat sauna stove is treated only with natural oils, without the use of chemicals.