Geothermal heating with cooling function - adjustable?

Hello,
first of all, thank you very much for the information. Here again is the overall situation for better understanding:
We have a plot with a southern exposure in an open field - no trees - no shade... it will definitely get warm in summer.

The cooling function costs us around €1,300 more than without. This is not peanuts, but considering the total investment rather marginal.

The goal, as already mentioned, is to cool the bedroom a little in the height of summer. We hope for up to 4°C less than the other rooms.
It is about 2 full floors with 36.5 cm Ytong walls ([KFW70] is achieved). The rooms are therefore not directly under the roof (insulation on the ceiling of the upper floor). The bedroom already faces north.

Since it is the bedroom and we (mostly) do not lie on the floor there, the whole "cold feet" discussion is unnecessary.
Let's see if it works out as we hope. We will gladly share our experience.

Hi,

I find that interesting. I had also thought about it once, but dismissed it. As I understand it now, minimal cooling with such a cooling function by 1-2K is possible? Stupid question, what does that "cost"? I.e., how much energy is needed for it?

Wouldn't it be more sensible and probably cheaper in terms of investment (possibly also running costs) to only cool the bedroom with air conditioning?

@Euro: What is the construction weight class?

Ah thanks, I thought it always gets pumped through the compressor.

Wouldn't it be more sensible and probably cheaper in terms of investment (possibly also running costs) to only cool the bedroom with air conditioning?

Apart from the electricity costs, you always need a way to get rid of the water for an air conditioner. Usually a hole through the wall to the outside is required. Then an ugly box hangs outside on the masonry or something similar. We didn't want that. Basically, an air conditioner is much more effective - of course. With a different construction method (e.g. more glass, gabled roof, less insulation), I would probably have considered planning one into the house build from the start.

Well, I thought if I only get 1 degree down for €1300, that's pretty little. It wouldn't be a reason for me to spend money.

AAC can achieve more of what I imagine cooling to be. I wasn't thinking of a professional split unit with installation, more of a small combo with a condensate water container. It seems to be only about a room of 15-20m² (?) and maybe for 20 days a year, right?

Apart from the electricity costs, you always need a way to get rid of the water for an air conditioning unit. Usually, a hole through the wall to the outside is necessary. Then an ugly box hangs outside on the masonry or something similar. We didn’t want that.

yes, all as part of a new build...no problem at all...you can drain the water directly into the sewer, the hole in the wall is finished in no time, the ugly box is placed outside in a corner on the ground and covered with specially designed wooden lattices...

As already said, with the passive cooling as you have it there, you can’t expect more than 1-2 degrees. If then the sun shines on the house for a few days in midsummer and it heats up...then it’s questionable whether you will feel any cooling effect at all...