Selecting the heater
The volume and structures of the sauna affect the selection of heater . An average of 1 kW of heater power is required for each cubic metre of sauna volume . The power requirement increases if there are window surfaces or heat-storing surfaces such as brick , concrete or non-insulated log in the sauna .
When building or renovating your sauna room , remember that the walls and particularly the ceiling require good thermal insulation . One square metre of stone , glass or similar noninsulated surface increases the heater power requirement as much as if the sauna room cubage were increased by 1.2 cubic metres . If the interior wall of the sauna room is noninsulated log , multiply the cubic volume of sauna by 1.5 . You should also pay attention to sauna room ventilation . Efficient air circulation ensures that the bathers can enjoy clean air that is easy to breathe .
4