HIGH-CAPACITY FAN: Ventilation fan operates on a single, impact-resistant centrifugal blower wheel with 157 CFM, 1.5 Sones, and 120V for a powerful and effective performance HEAVY-DUTY: Housing is constructed of 20-gauge galvanized steel and features a 6" round metal duct connector to provide long-lasting use CUSTOMIZATION: Fan ducts horizontally, vertically, or in-line with a separate adapter for your convenience EFFECTIVE: Motors are permanently lubricated to provide continuous and quiet operation VERSATILE: Install fan in ceiling or wall -wherever it's needed most!