this may sound wacked **** ,**** I have had air lock with large fire doors like 36 and up. open a window 1/2 inch and they slammed shut . has worked with inspectors I also try to keep them closed for a few days to help set weatherstrip
My 24x42 garage did not have any windows .When I was working in the back corner we lost power getting to the door was not fun. I put 2 transom windows in the back gable end , they are 1 1/2' x 5' 8' off the floor so about 9 off the ground. I love the light now .