To let a breeze into your room, do your windows open out from the bottom or the top?
If your windows are stacked (upper and lower) which part opens and which part stays fixed?
(Germans with 3D windows don't count. Lüften is a weird cultish ritual and you should all feel bad.)
They are good for that, but sometimes the little arm falls out of the track, then you have to remove the screen and put it back in. Always great during a torrential downpour..... Not that I'd know from experience haha.
I'd love to see how some of those German window types would work here.