best managed companies we know how to move air! canarm xfs series exhaust shutter fars was xfs exhaust shutter fans • easy to install - plug & play • 3 speeds • fully assembled • maintenance free operation • pull chain speed control • magnetic shutter closes automatically when not in use learn more fan selection guide application minutes per air change minutes per air change determine the proper canarm® fan for your number of cubic feet in room required cfm number of minutes capacity per air change bowling alley church classroom dance hall department store dry cleaning minutes per air change application engine room factory forge room foundry garage general office minutes per air change application gymnasium laundry locker room machine shop plating room pressing room application projection booth summer cooling toilet transformer room warehouse welding shop check out our huge fan selection! single-speed standard wall fan standard wall fan variable speed wall fan single-speed explosion proof wall fan shop now shop now shop now shop now