The Hessaire 20 Inch Shutter Mounted Exhaust Fan is a heavy-duty, corrosion-resistant unit crafted from durable steel, designed for a variety of applications. Pre-wired and fully assembled, this fan offers both variable speed and 3-speed options, making it ideal for efficient ventilation in garages, workshops, and industrial spaces. Enhance your airflow with this reliable exhaust fan, built to withstand the elements and provide optimal performance.