[Tommy]

I have a house with a 16 x 24 stand alone garage next to the water in NW Florida. I needed a way to keep things dry, so I insulated the entire garage and installed the smallest window a/c unit I could find. It takes a long time to cool things down after the double garage door has been opened, but once things are cool, it takes very little to keep it cool and dry. Even 80 degrees feels ok when its dry. So, the answer to your question is - it depends on how well insulated your garage is and how quickly you want to cool it down.