12 in. Aluminum Shutter High Speed Exhaust Fan (2-Pack)

The 12 in. exhaust fan with automatic shutters can help replace your ac unit by cooling your garage, attic, greenhouse shop or chicken coop. And this shutter exhaust fan can easily be added to a window opening or opening in the wall. With high quality corrosion resistant aluminum blades, can better extend the service life of the exhaust fan.