Anything short of an air conditioner, the best you're going to get is the same temperature as it is outside. That's why I went with the screen, also if you're in the garage working or doing laundry you'll need the extra daylight. I thought about the motorized screens, but if you're outside working in the yard it's too much trouble to keep putting it up and down. We went with the horizontal sliders, so you can open one section go and close it behind you. Also it's much cheaper, we paid $850 installed for our 12' door opening.
