Centrifugal Wall Mounted Exhauster Direct Drive Fans (CWD) are designed to exhaust air up to 3,360 CFM, with high static pressure capability up to 1". The spun aluminum exterior provides a pleasing appearance, weatherproof construction, and resistance to corrosion. The low silhouette design is less noticeable on the building exterior, and the removable dome provides easy access to the fan interior for service and cleaning.