I think mounting a big fan on the wall up high and getting a phantom screen on the garage door leading to the backyard is the winner.
https://s-media-cache-ak0.pinimg.com/236x/b7/1a/7c/b71a7c0278928e47c1e42c8c11246a94--electric-fan-garage-doors.jpg
http://www.entryways.com/images/doors/D156-2.jpg