But that is only a small part due to the heat pump. It is due to the solar heat gains through large windows and extremely insulated houses. The "problem" can only be solved if you live in a poorly insulated house ;-)
Once the heat is inside the house, it doesn't go out anymore. It's like a thermos flask.
Oh yes, I (still) live in an uninsulated old building. Even now, when the sun shines properly, it is up to 26 degrees warm in my living room.
We didn’t have a heat pump in the last place but rather underfloor heating, and I didn’t like it that much. For some reason, I just like to be able to react spontaneously with a heater. In summer it was... In spring, I sometimes found it annoying when it suddenly got really warm inside just because the sun was shining outside. Then it was time to "air out." We didn’t have large windows; it was a listed building; in summer it was rather cool inside, as the underfloor heating was probably off. The topic only came up during the transitional months.
Only if they are installed in standard 55 houses that have heating loads too high for an air-to-air heat pump. 40 and better looks different again.
That is why in the first postings it is always asked what kind of house is being built. So you have to approach it very differentiated.
First, you have to determine what the house will look like energetically in the end. And then choose the heat generator. Of course, you can also say "I want IR and build the appropriate house around it." It’s just not the wisest decision...
Well, our situation was quite tricky since we didn’t want to build a house or were already living in our own home. Then came Corona and everything closed, and one thing led to another. I was "always trying" even here in the Saxon countryside, where, among other things, I lacked the necessary contacts, so it turned out the way it is now and we find it pretty nice with us.
I never claimed wisdom anyway; the path would be too long for me. My well-being is my priority, and that arises for me at least less from a heat pump, IR, or anything else. Even if it would have been energetically sensible, I wouldn’t have installed underfloor heating because we wanted our beautiful floorboards and the fireplace to go with them.
I would never want to deal with these topics so extensively; I just like it, and I like it nice. I have both here, although by now I would do everything differently again.
But yes, I do not contradict you at all in the field of heat pump or underfloor heating technology; you obviously know your stuff well; I just asked those who know about IR and followed that. Luckily, both or many things are possible.