some of us dont have the ability to put in a wall mounted AC unit. I dont have any windows in my garage but oh well. What I think I'll finally break down and do is insulate above the garage with R-13 insulation and run in a small duct from my inside AC that I can shut off if I need to. I'll also run a duct coming into my cabinet for fresh air from the inside of the house....basically a passive intake. being in the "south" it gets quite HOT here, so we'll have to see how it goes.