Your in Texas, so hot like me! Best thing I did was put in these 60" Agricultural ceiling fans. Got them from Global. Doesn't cool it off, but just nice to have air moving, and you can really feel them in about a 10' circle underneath. I have eight, with them split for front and back of shop. The big fan in the eve is a 24,000 CuFtMin unit that can change the air in the shop in about 4 minutes. It is loud, but moves a ridiculous amount of air. If I shut the roll ups, the air speed through the man door is like 15 MPH!