David, the AC unit on the roof has iced up. No, the garage is 550 sq. ft. You have to add 10% for Arizona and 10% if not shaded.
Steve, don't know the ton thing but at least a 18K unit for my shop. Around $1500 to $1800 shipped. This is for a 16 to 17 seer rating unit.
As far as power an 8/4 wire with a dryer plug in one end. My 220 in the shop is 25 ft. of where I want to put the outside unit. We only do wash about once a week. No sense in spending the money to run a 220 line the entire length of the house.
The best prices are AJ Madison out of New York. The bad news are the reviews of issues. Not good. They do offer free ship and no tax. Want to get one ordered before the nitwits apply internet tax. Not sure how far out that is.
tt