Tubes FOXIS are covered behind the wall coating. It reduces time of heat up about 80%. It raises the surface temperature of the cold walls. This effect causes a tube pulling along the walls tightly despite of being like classic radiator only hanged under window. Currently the walls are getting dry.

FOR MORE DETAILED EXPLANATION WITH THE HELP OF FOXIS HEATING FOR OLD AND HUMID PROPERTIES, please you can see here:

http://www.teplonachalupe.cz//