New underfloor heating instead of radiators and controlled residential ventilation; yes or no?

..... According to an independent building expert, this is supposed to have the advantage that we only have to heat at about 35 degrees when heating solely with underfloor heating....

How is this advantage reflected in relation to the additional investment cost?

..... The builder is a renowned company that has existed for 30 years and carries out about 150 constructions annually.... They have their own energy consultant who calculates the house on the computer and can tell us whether all the measures are sufficient for KFW 55.

Whether one has to desperately chase a certain subsidy level should be specifically examined on a case-by-case basis. The idea of receiving "gifts" is mistaken. The subsidies are intended to more or less cap the higher expenditure. To what extent this actually succeeds depends on the individual case. In any case, the expected consumption costs should be determined beforehand. For this purpose, knowledge of the actual demand (power, energy) for heating and hot water is required. Best regards

Hello €uro,

That is unfortunately a mistake. Some time ago I completed the planning for a KfW40, with radiators!

Then please write how you got there; I would be interested; with radiators alone it certainly is not enough.

Rhenish greetings

Hello construction expert,

... I would be interested; with the radiators alone it is certainly not done.

Completely correct, the type of heating surfaces plays a rather subordinate role. In my case: timber frame construction, detail. WB verification, fully modulated air heat pump of small capacity, controlled residential ventilation with heat recovery, and radiators as heating surfaces. Best regards.

We have decided on underfloor heating and [Kontrollierte-Wohnraumlüftung]. Today, the energy consultant also informed us that this allows us to achieve KFW 55.