By the way, one of these fans displace a lot of air
http://www.walmart.com/ip/Lasko-20-W...-Gray/22614934. One is all I use to keep the fumes out of the 252 sq. ft room I use, and as soon as the gun is clean I can remove the respirator. I pulled the face off and mounted it to a piece of 1/4" laminate to fit in the window frame.