Ceiling valves in style - does such a thing exist?

Honestly, you don’t notice that on the ceiling at all. Every smoke detector is more noticeable, like a pimple on the ceiling.

And it’s only the exhaust vents anyway, which you naturally have in secondary rooms and rather not in the living room.

Nope, it's also supply air. Unless I choose something else...

They are not adjustable at all (except volume). With Zehnder, (for me) adjustable valves in the supply air were standard.

So another argument for it, is ok

I find it really ugly. Even without the association mentioned earlier.

We have those :p it's for exhaust air. Simpler round ones are for supply air. I didn't like any of it either. But we don’t see it anymore. Still, thanks for the thread and the other examples. I’d probably like to go for square ones, but replacing at least €20 per ventilation outlet – I'm probably too stingy for that :rolleyes:, because we’ve gotten used to ignoring the things anyway.

Also noch ein Argument dafür, ist doch ok

No, functionally the simple caps are exactly right for the exhaust air. However, not for the supply air.