Cooling with heat pump via underfloor heating?

May I ask how much the air conditioning cost? Did you build with Viebrockhaus?

May I ask how much the air conditioning cost? Did you build with Viebrockhaus?

No, with a construction company that mostly operates in the northern region. I think we paid about 5000 for the air conditioning. The preparation for something like that should not be underestimated; because of the condensate water, substantial pipes had to go through the walls.

Preparation for something like this should not be underestimated; because of the condensation water, solid pipe sections had to go through the walls

This is very individual. Sometimes it's only 1 meter of hose that is routed through the sloping roof/wall to the outside. It depends on the installation location and form factor of the system.

I just spoke with our prospective neighbor yesterday because he is unsure whether an air conditioning system should be prepared or not. My advice: If it is not completely ruled out to install a unit at some point, he should definitely at least provide the condensate lines. This only costs a small additional charge, but with reasonable effort, it will no longer be visually appealing to implement later. If I take these items from our offer, we are talking about roughly 1200 EUR gross. Depending on where your drains are located, you might even save a few meters.

So we are building Kfw 40+ and definitely want an air conditioning system. We would have 60sqm open space and 20sqm work/bedroom to cool on the ground floor and on the upper floor three rooms of 18sqm each and one room of 12sqm. Our construction company mentioned something like 20-25k for everything. One unit in each room. But the company does not install it themselves; they would also source it through a subcontractor. This subcontractor is known for his pharmacy prices. We have now contacted several companies ourselves and are waiting for offers. I'm curious... In the open space, for example, I would like a ceiling outlet and no unit on the wall. But this will probably be difficult to impossible due to the statics / delicate ceiling.

Everything is possible if it is planned early enough. For a ceiling cassette, however, I would rather increase the room height and use a suspended ceiling. Then you also have plenty of space for all kinds of other lines.

For our system with a similar size (although "only" with normal wall units), we will definitely stay well under 20 K, which also seems to be a good price for the models used compared to some nationwide (Internet) providers.