I live in South Louisiana. As many of you know it gets very hot. With the humidity it gets triple digits. No better at night with the humidity. I have chickens. I needed something that could move some air in their coop at night. I decided on these 12" exhaust fans. Boy did I make the correct decision. This exhaust fans move some serious air. It has brought the temp of the coop down at least 25 to 30 degrees cooler at night. My chickens are less stressed. Nobody likes hot temps. Not even chickens. I would no doubt buy these again.