I had been trying to figure out a way to keep my garage cooler so I could be more comfortable while working at my workbench.  In San Antonio, summer temperatures plus humidity can make it miserable while you're working. Tried many portable A/C units, but none worked. Honestly, I didn't want something I'd have to vent, but finding no other way, I broke down and made a hole through the wall for the A/C exhaust. It was totally worth it! I also insulated the garage door with an insulation kit, and my garage went from being in the high 90's, to hovering around 82°.  Of course, my garage is not sealed so it's not an ice box, but this unit really cranks out the cold air!  I'm really glad I bought it!