Philippe Schutt wrote:The circuit is not necessarily visible, there are plinths and cornices that hide the pipes, and of course the walls and heated floors.
a 15kw is around 4000 €, a 22kw 4700 €.
If your house is insulated (and an electric one should be) 15kw should be enough.
floor and wall this will not be easy.
isolated electrical house of the time, but I will remedy that.