ᐅ Heat Pump for Space Cooling Combined with a Split Air Conditioner?

Hello everyone,
we are currently planning the renovation of an older house, or at least part of it. As part of this, a new air-to-water heat pump will be installed.
Since the renovation mainly concerns the upper floor and it gets quite warm there in summer, we are considering installing some form of air conditioning.
New heat pumps can also be used with underfloor heating systems for cooling purposes, effectively reducing indoor temperature. I have read in several articles that this is the most efficient solution, but the cooling effect is limited to a maximum of about 4°C (7°F) and works rather slowly.

Also – if I’m not mistaken – when cooling with a heat pump’s system, every room or each floor is cooled collectively. Individual room control is not possible. Or am I wrong here?

I am now wondering whether it makes sense to install an additional split air conditioning system, or if this is generally not done, not recommended, or simply uneconomical?

Does anyone here have any experience with this?

Best regards
Christian

Cooling through the underfloor system only works to a limited extent in new buildings. In a renovated older building, it is a waste of money.

You will need a commonly used split system. Incidentally, this is the same device you would use for heating. However, it affects the air rather than the water in the underfloor heating.

Thanks in advance for the feedback.
I spoke today with a technician who specializes in air conditioning. He explained the issue of cooling via underfloor heating from a physical perspective. Cold air sinks from top to bottom >> cooling through underfloor heating means the cold is already at the floor level.
He will now prepare a quote for my building project. I'm curious to see what the final cost will be. As a rough estimate, it was around €2700 to €3000 per room...

That's correct, which is why in this case, essentially only the floor is being cooled, and you also have to be careful not to fall below the dew point. So, the cooling is happening in the wrong place, and it cannot be done to the necessary extent, because that would cause moisture problems.