Originally Posted by JKnight
Basically your saying frame the 14" hole in between the 2 sheets of metal and there is no need to support it back to the supports?
Wondering what kind of wood as well. I have never heard of dried kiln before. I assume thats not something you can get at the local Home Depot?
The opening for my OEM air conditioner was pretty close behind a center rib but the rear rib was about 20" behind the rear of the opening. I built a support frame and slid it all the way back to the rear rib. That way the pads are supported as well as the gasket. After I got the frame installed where I wanted it, I screwed it from below through the inside skin so it wouldn't move.
The wood I used was kiln dried and then air dried to about 8%. I didn't use treated wood because the treatment chemicals are corrosive.