ᐅ Can the air-to-water heat pump also be used for cooling in the summer?

...according to some reports, this can work (depending on the construction type).

I imagine it like this: In winter, water circulates through the underfloor heating loops at a temperature a few degrees warmer than my desired room temperature, and in summer, when it’s around 35°C (95°F) outside, the heat pump delivers water at 18°C (64°F) or even cooler. Since the sun is shining, the heat pump runs on its own electricity, and I have a comfortable 23°C (73°F) inside the house.
Of course, the cold air doesn’t rise, so you might only have cold feet, and if it’s set too cool, maybe some damp spots.
Maybe this isn’t needed at all if the building is well insulated and the indoor temperature stays about 10 degrees lower than outside.
Still, I would be interested in your opinions on this topic.

Regards, dieter_m

No. It doesn’t make sense. We are installing a separate air conditioning system.

dieter_m schrieb:
you just end up with cold feet

Exactly, nothing else... without ventilation cooling... the sun doesn’t only warm the floor but everything inside your house.

High cooling capacities cannot be expected from underfloor cooling systems, as the temperature of the floor must not be much lower than the room temperature to avoid condensation. However, even with a mechanical ventilation system, high cooling capacities are unlikely, as the air flow rate is too low.

Exactly. That’s why you should install air conditioning. The costs are reasonable. We only air-condition the bedrooms, living room, and home office. About 7,500 EUR.

Ground-source heat pumps have the option for passive cooling.