KfW energy calculation with cooling heat pump

I would immediately think of active cooling and at least have the lines installed. You don’t need to be afraid, no, these will not become obsolete. There are only two copper pipes, a 5x1.5 NYM cable, and a condensate connection for each indoor unit.

Thank you very much for the tip! I will talk to my architect about this. The copper pipes can probably be routed anywhere, right? Is it also allowed to embed the lines into the thin ceiling? We will also be making a reinforced concrete ceiling on the upper floor, and the pipes would definitely find a good place there. ;)

Thanks in advance!

You are allowed to do so, but whether you should is another matter, because they can also leak sometimes. Our installer made sure that all pipes are easily accessible and maintainable with minimal effort.

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In addition, the supply air in summer (before it enters the house) is to be routed through an underground pipe system on the property in order to use the lower temperature below the earth's surface in summer for additional cooling of the fresh air.
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If I'm not mistaken, this is also done like that at .

Yes, we did it that way. However, this only makes sense from a certain duct length and depth onwards. Most plots of land nowadays are too small for it. We also have a cooling system for the air (heat pump, cooling buffer, cold water coil…). Cooling via air only works properly from about 5x air exchange onwards. "Normal" controlled residential ventilation systems are far from this. Our entire system is designed for this. Therefore, it is not really suitable as an example. For a normal single-family house, I would always recommend a proper climate split unit. This has also been explained in some comments before.

The copper pipes can certainly be installed anywhere, right? Is it allowed to embed the pipes in the filigree ceiling? We will also make a reinforced concrete ceiling on the upper floor, and the pipes would certainly fit well "underneath".

Certainly, but I would then lay the pipes in the area of the concrete ceiling in a protective conduit. (A simple HT pipe is sufficient).