Can a through-the-wall A/C unit be mounted in a window?
Wow and here after all these years I thought they were the same thing.
Well they are the same, basically. The part that is critical is the external vents can not be blocked by the wall, and that’s where the problem comes in - because of the thickness of the wall. However, going from a wall mount to a window should be no problem at all, other than the mount and making sure to tilt it just enough that the condensate drains outside.
I state this with the understanding that the unit has the normal fully enclosed system except the coils and air vents (I have not seen one that was not enclosed, but wanted to cover all the bases).