The iLIVING smart remote shutter exhaust fans are equipped with a thermostat, humidistat, variable speed and timer. These fans can be activated with a remote control up to 1,000 feet range. The iLiving exhaust fans are perfect for removing excess heat, moisture, and unpleasant odors from virtually any commercial location, including restaurants, factories, warehouses, barns, and greenhouses. This fan features aluminum blades, OSHA compliant wire guards, and automatic shutters that open and close in tandem with the operation of the fan. The completely enclosed motor is thermally protected and permanently lubricated. The fan comes fully assembled out of the box. The shutter fan comes in 6 different sizes: 10 inch, 12 inch, 16 inch, 18 inch, 20 inch, 24 inch.