Windows & window size: what to choose? Double-leaf windows?

Maybe one should use double-wing windows with this width?

In terms of measurements, it is right on the edge.

About 25 cm of glass area is lost in the middle.

Well, for me, not quite eighteen - with a post (even less with a mullion).

Counterproposal: in "Child 2" and "Work" take a fixed part at the bottom, up to the sill height of the bathroom window; and then keep the rest single-wing throughout. This way, the facade looks less wildly mixed than with double-wing windows, and potted plants can simply stay in place when airing out.

So for me not quite eighteen - with mullion (even less with muntin).

I haven't measured it. But it just feels like a lot of frame for a small window...

Thank you very much for your opinions, Nordly, we initially had windows 126 cm wide, I find the ratio of glass area to room size too small (1/8 ratio), that's why I enlarged them to 138.5. I tried to visually represent different variants on the computer. 01. is the current state 02. 138.5-double-winged 03.138.5-horizontally divided ( version) we have already submitted the building application but I assume these changes are not relevant for the building permit or can simply be communicated. Therefore, I have another version: 04. 151-double-winged 05-151-double-winged - also bathroom Alternatively, for double-winged you can have the window vertically divided with one wing and one fixed part. Considering only the glass area, 138.5 wide and divided is worse than 126 cm single-winged, therefore I find 138.5 double-winged rather pointless. What do you think?

I would stick with 01. I think such small divided windows somehow look silly. And it doesn’t bring any benefit – in your case it even reduces the glass area. I would only do double-leaf from 180 cm total width or for doors.

01!

03 was just a note from me regarding clearing the windowsill. My favorite would be 01, however, I would still bring the toilet window to the same sill height as the bathroom window. No worries, you still won't be crouching there in the dark. But it tidies up the facade.