08-01-2009, 02:36 AM
The ones that I have here are actually held in place by the bottom of the bottom sash. The screws are more or less to keep the sash from rising. You can put the AC unit in the window opening holding it tilted in somewhat, close the bottom sash until it touches the top of the unit and then let unit tilt back until it touches the sash. At this point it will stay in place and you can install the screws.
I have one unit in a vinyl replacement window and screw into the vinyl. The screw is far enough away from the glass that it's not a concern. The hole is not even noticed when the AC unit isn't there. I suppose you could caulk the hole after removal if it bothered you.
I have one unit in a vinyl replacement window and screw into the vinyl. The screw is far enough away from the glass that it's not a concern. The hole is not even noticed when the AC unit isn't there. I suppose you could caulk the hole after removal if it bothered you.