Gas heating capacity selection 20kW instead of 14kW

Ok. Yes, I expected these answers. I will not have the additional radiators installed for now and possibly after the construction.

Hi, maybe even reconsider the 14KW power. We have a 5.3KW demand (according to the energy consultant) for about 300m²!!)

So individual room heating load, then dimensioning of the heating system. Without the heating load calculation, it will be done "as usual." And that does not always mean good! (properly dimensioned)

I believe 14 kW is the lowest (max) output in the Wolf Gas-Solar series. We are building with GU. We are initially bound to the construction and performance specifications there.

With 20kW you can then also heat the other half of the semi-detached house at the same time, so yes, if possible, take the 14kW. Or you open an [UG] and sell your excess heat to your neighbor.

So the company insists on the higher power output and otherwise refuses to provide any warranty for the radiators.

Insist on a room-specific heating load calculation according to DIN xxx