Perfect for Warehouses, Workshops, Greenhouses, Sheds and Barns.
They exhaust when needed and then the shutter automatically closes to stop infiltration of air when the fans are not operating. Eliminate Dust, Odors and Moisture and Heat.Comes with power cord. Professional Grade Products Plastic Shutter Exhaust Fan 8" 434 CFM Shutter mounted exhaust fans are widely used for ventilating stores, offices, factories, shops and farm buildings.