The Vevor 24" shutter exhaust fan is designed to improve ventilation in greenhouses, garages, sheds, shops, and attics. Its 190W AC motor delivers up to 3320 CFM airflow to help remove heat, humidity, odors, and dust from enclosed spaces. The fan features a rugged all-metal construction with a galvanized steel frame and aluminum alloy blades and shutters for durable performance. It comes fully assembled for easier installation and includes thermal protection for added operating security.