Revisions log for Answer #3123

I agree with the previous speakers: second, these heights don't have to be tight together. And first: if you add the 223mm difference to the 312mm height of the roller shutters, you get 535mm, which is the "upper sill height" between the window and the ceiling.

It is often underestimated how much daylight is reflected in the ceiling. With such high lintels, it will be too dark in the rooms more than half an hour earlier in the current season if you don't add lamp light.