How often is it normal to fill the heating circuit in a new building with underfloor heating?

Somewhere something is wrong, there is definitely a leak or air present!

oh oh oh this is going to be expensive

I bet you don’t own your own house, or you are extremely dissatisfied with "yours".

I bet you don't own your own house, or you are extremely dissatisfied with "yours."

I am curious about the reasoning behind this statement.

I am looking forward to the explanation behind this statement.

It's really annoying to tell someone who just needs help and maybe is worried, without knowing what caused the error, that it will be expensive.

The statement has exactly zero added value. Not only that, but it can also be absolutely irritating.

In my opinion, only people who are very dissatisfied with their own situation do something like that and take delight in the fact that others will also be badly affected.

But hey, I'm happy to be proven wrong.

What do you think this statement by Danixf is supposed to achieve?

Also, the statement from the heating technician as well as Viessmann is that this is normal because the internal pressure equalization vessel is only there to protect the device and does not really contain much volume.

PS: I can only agree that I expected somewhat different comments here...

So the statement from the heating engineer as well as Viessmann is that it is normal, since the internal pressure equalization vessel is only there for device protection and doesn't really contain much.

PS: I can only agree that I expected somewhat different comments here...

Well, that's great! Then it's working.

And don't mind some statements... Unfortunately, there are unhappy people everywhere.