Cooling in summer with air-to-water heat pump, underfloor heating and/or ventilation system?

I didn't route the ventilation system through the ground, but in my experience, cooling via air does not work as well as expected. Example: 25 degrees inside the house. Outside at night 8 degrees, bypass open, which means the 8 degrees more or less go directly into the supply air. Still, the room temperature hardly drops at all, because apparently the screed and walls, the entire mass of the house, do not lose the stored heat from the day that quickly. However, I have no comparison to how it would be without ventilation. It could of course be that we would already be at 27 degrees room temperature then.

Hello,

I also have a question: I have a Tecalor 404 THZ Eco in the house, an air heat pump.

In summer, the underfloor heating switches off thanks to the summer mode parameter.

Wouldn't it be possible to set the temperature for the summer mode higher so that the underfloor heating turns on and simply set the room temperature to e.g. 22°?

Then it would actually lead to cooling in the house if, for example, the outside temperature was 25°!?

They always say you have to watch out for condensation forming on the pipes in the floor, but with only a slight difference to the outside temperature...?

No, it doesn't work like that. Because the heating simply wouldn't turn on at 25 degrees.

However, there are heat pumps that simply store the heat in the house passively into the ground via the probe in summer without a compressor. The disadvantage, however, is that the floor then feels cold.

We have geothermal energy with cooling function. It has been 30°C outside for days. In our house, it is constantly 22°C - even on the upper floor. We are so happy that we bought this function back then.

we have an air-to-water heat pump and can also cool with it. It works. The downside is that the floor becomes cold. Negative as well but of course system-related is that the compressor runs all the time and consumes electricity.

At 30°C outside, I am really happy about my cold floor. When you come in from outside, you just want to lie down on the floor. Otherwise, there are slippers. This Friday, nearly 40°C is expected. Let's see what the cooling will manage then.