Which heat pump is most suitable for our new building?

Why should one provide a justification? - Let's think briefly... for example, because it is always very easy to make claims in a typical cunning pig manner and then not provide any justification for them. Besides, I thought the purpose of a forum is to help each other. But honestly, your response doesn't really surprise me, because when I look at 90% of your answers in this forum, they are in the end only little to not at all helpful for the thread starter or questioner and, in my opinion, serve only one purpose: selling your own service!

As for me, I consider it appropriate to follow a claim with a justification and I believe most other people see it the same way. By the way, from my point of view, it does not inspire much confidence in your own service if, like you, you always disparage other things (even if it might be correct) without providing the corresponding justification. Maybe that would rather contribute to someone using your service - ever thought about that!?

....By the way, from my point of view, it does not inspire much confidence in one's own service if, like you, one always only criticizes other things (even if it may be correct), without providing the corresponding justification.

I had already indirectly provided a justification. For this, take a look at the air volume plan and DIN 12831.

best regards