Just a completely different question, the 2.50m in your drawing, is that the room height when everything is finished or the shell height? If the latter, quite a bit of room height would still be lost, which would make such a window difficult...
That meant the room height when everything is finished.
Oh, I lovingly call something like that a walkway. And we have one :D I also want air corridors in my own home.
Oops, I just see that instead of not, also was set. So: I do not want air corridors
But you advise against it, right?
I wouldn’t say so now. I no longer advise anything here except seeing a professional, because you’re putting together a puzzle here over weeks – and in my opinion that can only serve as a waste of time.