If you wanna go even cheaper with a fan I got mine at the $ store lol. I have two $1 mini fans that attach to the USB port of a computer, plugged into an adapter for charging your phone and they've been spot on for me. I gorilla taped them to the inside of a piece of 6" ducting I got at Home Depot and so far no problems. Blows outside air in good enough and exhausts my room too. Temps haven't gone above 80-81 so far. So whatever. I may get one more fan though for air circulation under my canopy to put on top of my air intake hole and I'd def consider one of these $15 dollar ones. I can place it on the floor, angle it into the foliage, and on top of it all it's a few dollars cheaper than my hurricane clip fan I'm using for my canopy now