The Grainger 14F539 is a 14-inch diameter, 539 CFM, 115V, 1/3 HP, direct drive exhaust fan. It features a galvanized steel housing, backward-inclined aluminum blades, and permanently lubricated ball bearings. This exhaust fan is suitable for commercial and industrial applications such as ventilation for warehouses, manufacturing facilities, kitchens, and bathrooms. With a maximum temperature rating of 104°F, it can withstand hot and humid environments. The 14F539 operates at 3450 RPM and weighs approximately 25 lbs.