Sauna cabin heating system - uses prefabricated heating coil and perforated panel units for sides and ceiling

The sauna cabin has a heating system with a heating coil (12) which can form part of a hot water system made of plastics, copper, etc., housed above the ceiling and also around the upper part of the sides. The coil is of zig-zag shape. This coil can be housed between an outside insulating layer (17, 18) and a perforated inner layer (11) made of wood, plastics etc., in the form of panels or strips. These layers are inside the main walls and under the roof of the cabin. These inner layers and the heating coils can be made as prefabricated units with the pipes held by spacers on the perforated panels.