Question about Sonnenkönig Window kit

Well the material’s job is to create a thin barrier between the inside and the outside while the window is open. If mounted properly it works perfectly fine, but I had to also ensure other small cracks at the joints of the window are covered all the way.

In short, yep it works, but have few small cloths around for those little holes.

hope this helps.

Well it's not very effective but it's the best solution for a "all in one" AC units. Other solutions exist which can be placed under windows which slide vertically but I have no such window. You have to remember that some window in your dwelling will have to remain opened while the AC is operating or else the vacuum created by the AC will detach or even rip the Sonnenkönig Fensterkit. So no, it's not effective but it's still better than nothing. The best solution? a split system. Btw I just ordered another one as the one I have from last year is showing some wear and tear. Stay cool ;)