A workshop that traps heat and fumes, or a greenhouse that bakes in the afternoon sun, needs more than an open window. This 20-inch wall-mounted shutter exhaust fan moves 2,660 cubic feet of air per minute, pulling stale, hot air out and letting fresh air in. The aluminum blades are driven by a 130-watt AC motor that runs on a standard 120-volt US circuit, spinning at 1,500 RPM to create enough airflow to cool and ventilate a garage, barn, warehouse, or commercial bay.The louvers are aluminum and fully automatic. They open when the fan starts and close when it shuts off, sealing the opening against rain, snow, and pests when the fan is not running. No chains, no manual latches to forget. The fan body is carbon steel with a black powder-coated finish that resists rust and holds up in humid or dusty conditions. Installation is straightforward: the fan arrives pre-assembled, and mounting it to a wall or window frame requires only basic tools and the included hardware.This fan is designed for spaces where heat, moisture, and fumes accumulate and need to be moved out quickly. Use it to ventilate a welding bay, pull smoke out of a commercial kitchen, cool a chicken coop, or dry out a flooded basement. Always disconnect power before servicing, and keep the blades and shutters clean for maximum airflow. Measure the intended wall opening before ordering to confirm the 20-inch fit.