Available in multiple sizes. Galvanized steel and aluminum construction. Different size options also different power and speed. Features blades, corrosion-resistant wire guards, and automatic shutters. UL listed with speed control, permanently lubricated motor. Electrical hardwiring installation required. Clear the air in your restaurant, factory, warehouse, barn, or any commercial location when you install the iLIVING Variable Speed Wall Mount Shutter Exhaust Fan. Aluminum blades, wire guards, and automatic shutters create a long lasting fan that will pull excess heat, moisture, and nasty odors from your worksite. The motor is enclosed and thermally protected and permanently lubricated for a smooth functioning machine. It is fully assembled and the electrical hardwiring is ready to be installed. The fan comes in various sizes to fit your needs.Size Options: 10 in., 12 in., 16 in., 18 in., 20 in., 24 in.