The Grainger 14F532 is a 14-inch diameter, 532 CFM, direct drive upblast roof exhaust fan. It features a 1/6 HP, 115V motor with permanently lubricated ball bearings and automatic thermal overload protection. The housing is constructed of heavy gauge aluminum with a spun aluminum venturi for maximum airflow. It comes with a backdraft damper to prevent reverse airflow and has a galvanized steel base with pre-punched mounting holes for easy installation. The 14F532 can help exhaust stale, humid air from commercial kitchens, warehouses, manufacturing facilities and other applications requiring roof ventilation.