The Vevor 12" shutter exhaust fan is designed to improve ventilation in greenhouses, garages, sheds, shops, attics, and other enclosed spaces. Its 1000 CFM airflow helps remove heat, humidity, odors, and dust for a fresher environment. The fan features a premium AC motor with thermal protection and permanent lubrication for reliable operation. Built with an aluminum alloy fan and galvanized steel frame, it is made for long-lasting durability and weather resistance. It comes fully assembled for easier installation.