I installed it on the ac acces door. This door is 22 wide. The grille is 12x22. I liked the way it came out. My only advise is measure twice, cut once and be careful when tightening the screws. I cut the door hole a little too big and 1 screw didn't screw on.. no big deal. I just covered them with these white stickers I had. Another mistake I did was tighten it with a drill and overnight one side by mistake as shown on picture. Not done yet, still need to do other stuff like paint the inside of the hole I cut. I give it 5 stars, I would recommend it.
Rating: [4 of 5 Stars!]