ᐅ Cooling through underfloor heating

Hello
We are currently planning our house and want to install a geothermal heat pump with deep drilling, along with underfloor heating.
We have been offered the option to cool through the underfloor heating in the summer.
Do you have any experience with this, both positive and negative?
I have heard that this can cause condensation to form in the screed, which could lead to damage. Is there any truth to this?

I don’t think there is any condensation in the screed (where would it even come from), but you can’t cool down too much because otherwise condensation will form on the floor covering. You will gain about 1 to 2 degrees Celsius (2 to 4 degrees Fahrenheit) at most, which isn’t much, but it’s better than nothing (for relatively low electricity costs), and it helps to regenerate the ground a bit. For proper cooling in summer, you need a real air conditioning system.

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Well, relatively low electricity costs? There are actually two options – either just run the circulation pumps or actively operate the compressor.

I have the latter, and so far it hasn’t been great, because the compressor kept turning off quite quickly once the brine temperature reached 40°C (104°F)...

I really need to look into this properly...

The operating costs of the circulation pump are low, and the compressor is just as efficient as a proper air conditioning system. But can the compressor run for a long time without making the floor too cold?

No, not less efficient – but the electricity costs are definitely higher 😉

It has a dew point calculation, meaning it normally doesn’t get too cold because of that. But what annoyed me was that it quickly heated the brine so much and then had to wait before running again. So it cycled a lot – but as I said, I haven’t really explored the function much yet.

How does the dew point calculation work? For example, does he have a humidity sensor in the living room?

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