Luminous room height and window height. Provider standard 262.50 cm

The windows and roller shutter boxes come as one piece and are installed in the window opening. I estimate that the insulation comes in front of the roller shutters (22 cm deep with a brick depth of 24 cm, so it should fit).

What advantage would it have to integrate the boxes into the facade, so you could then make the windows higher? I believe that boxes in the facade are practically not possible?

It has the advantage that you don't have a lintel on the inside and the windows go up to the inner ceiling.

But I don't think something like that is simply possible, nor do I know where the roller shutter box would then go. I think it's okay as it is, with some lintel above the window; without it also looks unusual.