BTW, if you are concerned about security using a storm door even with a lock, these are a couple of suggestions that might help.
My husband found a cheap indoor security camera that sends pictures to a smart phone (or iphone) or email. It's Wireless IP Pan/Tilt/ Night Vision Internet...
I also don't have a place in the wall for a wall unit and my husband would probably be none too happy if I cut a place in the wall for one.
So, I have cooled a two-car garage over very hot summers with a portable a/c unit. I know that wall units are cheaper and do cool well but I have used a...