Air King AK864L is a powerful exhaust fan with light, designed for use in bathrooms up to 100 sq. ft. or other rooms up to 125 sq. ft. It features a heavy-duty motor for continuous operation, a built-in non-metallic backdraft damper for quiet operation, and a plastic collar for 4" duct connection. The fan can be mounted directly to the joist or centered between joists using hanging brackets. It comes with a moonstone glass lens secured with 5 screws and a white, round polymeric grill that can be easily removed if necessary.