Underfloor heating in the children's room? Some rooms planned without underfloor heating? Air-to-water heat pump removed?

I already see the premature compressor death. Rarely have I seen such a contrast between how a modern heating system should be operated in a new building and what the user imagines.

Honestly: Install a gas canister and blast 24kW into your place when needed.

Brine heat pump can cool, personally I think it is a great feature. Of course, you shouldn’t expect the effect of an air conditioner, but you can lower the house temperature by 2 to 3 degrees and that is very pleasant, especially almost without running costs.

The cooling effect via the controlled ventilation system (e.g. via an earth tube) is much smaller to almost imperceptible. Physically also logical, because air as a medium for the transfer of heat/cold is incredibly poorly suited.

The earth tube is installed additionally next to the heat recovery system in the ground? It will probably deliver significantly better results than the heat recovery?

I can already see the premature compressor failure. Rarely have I seen such a contrast between how a modern heating system in a new building should be operated and what the user imagines.

Honestly: Install a gas boiler and blast 24kW into your place when needed.

Rarely seen such unconstructive posts

What is not yet can still be, so chill.

Brine heat pumps can cool; personally, I think it's a great feature. Of course, you shouldn't expect the effect of an air conditioner, but you can lower the house temperature by 2 to 3 degrees, which is very pleasant, especially almost without any running costs.

The cooling effect via controlled residential ventilation (e.g., through an air well) is significantly smaller to almost barely noticeable. Physically, this makes sense because air as a medium for transferring heat/cold is incredibly poorly suited.

In winter, it’s about "free" preheated air.

In summer, you’re right. You can’t lower the indoor temperature with cool air. That’s what air conditioners are for, which... Oh wait

Doesn't the heat exchanger (heat recovery) also produce "free" preheated air in winter?

In summer, the ring trench collector brine heat pump with "cooling function" clearly has the edge.

Where did you get this insight from?

Not for free. Because the air that goes out has already been warmed once. But that is not directly the point either.
The air well simply causes the air that also reaches the heat exchanger to already be pre-warmed outside air.

You can only use the underfloor heating to a certain point for cooling. Namely up to the dew point.
However, if relatively cool outside air is continuously supplied in summer thanks to the air well, it probably has a greater effect according to my assumption.
Warmed air is transported away, cool air is supplied. This takes heat from the house.