Air-to-air heat pump in KfW 40+ house - switch to brine-water heat pump just before building application?

Indeed, the fact that the underfloor heating is so sluggish is currently bothering us a bit. In the family, there is the idea that with the air-to-air heat pump, individual rooms can be warmed up faster if desired.

You don't "cool" the rooms; you maintain the temperature 24/7... so inertia is not the issue.

I recently had this discussion among friends: they were looking for a heating system for the children's rooms in the new building that can do 23° during the day and 17° at night :oops: Maybe I should recommend [LLWP] :rolleyes:?

The discussion I recently had among friends: they were looking for a heating system for the children's rooms in the new building that could do 23° during the day and 17° at night :oops: Maybe I should recommend an air-to-air heat pump :rolleyes:?

I don't know anything about heat pumps... we have gas... but I can report that we set it 2 degrees lower during the day. That works, at least I don't sweat too much when I clean the windows ;) But it's not worth mentioning when it comes to the idea of constantly turning the valve up and down. Today's houses aren't made for that. It's an old habit that needs to be left behind.

We were in the model house in winter at -20 degrees, which was heated with an air-to-air heat pump. Inside it was pleasantly warm and no negative effects were noticed. However, we were only inside for about 45 minutes. We have also ordered an air-to-air heat pump with a photovoltaic system to compensate for the high electricity consumption with self-production. In summer, it can probably also cool (not as strongly as an air conditioner). We will move in at the end of the year, I'm curious if it will meet my expectations :)