This 16-inch silver shutter exhaust fan pulls 2000 CFM at 1450 RPM to clear heat, humidity, dust, and odors from garages, workshops, sheds, chicken coops, attics, and greenhouses. Its fully enclosed motor runs on 120V/60Hz at 115W, with built-in thermal protection and permanent lubrication that keeps maintenance to a minimum. The fan's galvanized steel frame and aluminum alloy blades and shutter stand up to weather, moisture, and dust far better than plastic alternatives, and the unit is FCC listed. Gravity-operated aluminum shutters close automatically to block rain when the fan is off, adding a layer of insulation in colder months. At 18.9 x 18.9 inches and 14.3 pounds, it arrives fully assembled and ready to mount straight out of the box, with four bolts included, so there's no wiring or extra assembly needed before it's up and running.