20 Inch Shutter Exhaust Fan,Aluminum Wall Mounted Attic Vent Fan with 2660 CFM,Heavy-duty Automatic Shutter,Low Noise,for Shed,Garage,Greenhouse Ventilation Cooling

Powerful Ventilation：Experience powerful ventilation with ease, delivering large volumes of air. This fan delivers 2600 cubic feet (CFM) of air per minute at 1,500 RPM, quickly removing heat, smoke, and stale air from any space. Rugged and Durable：Designed for harsh environments. High-quality aluminum louvers and blades are corrosion- and heat-resistant, ensuring long-term reliable operation. Easy and Convenient Pre-Assembled：Ready to use immediately. Simply install it in a wall or window opening, plug it in, and enjoy efficient ventilation. Automatic Louvers：Achieve maximum efficiency with automatic louvers that open when the fan starts and close when it stops. Prevents backflow and pests without any manual intervention. Versatile Application：Ideal for various spaces, including garages, studios, lofts, greenhouses, and warehouses.