[doctorhandshake]

While window researching recently I read an interesting comment, likely on a Green Building Advisor article - in many cases the inswing TNT better fits the European use of roll down shutters, whereas American casement windows better suit their more common use of drapes. Not sure if there’s data to back it up but it’s an plausible cultural/architectural reason for slower adoption in the US.

[pintxo]

Not sure about the drapes. After all, there are lots of them in Europe.

[fy20]

They need to be slightly further away from the window so that it can open in the tilt position. In most European homes that's not an issue, as the walls are thick masonry, so the window is inset 20-30cm against the wall.