WhisperSense-Lite™ ventilation fan/light combination with less than 0.3 sones. Rust proof paint with galvanized steel body. Detachable dual 4 inch or 6 inch diameter duct adaptor with built-in back draft damper. Double hanger bar system allowing for ideal positioning. Attractive design using PP material. Attaches directly to housing with torsion springs. Four pole totally enclosed condenser motor rated for continuous use. Motor equipped with thermal cutoff fuse. Permanently lubricated plug-in motor.FEATURES:- Built-in dual motion and humidity sensors with versatile functionality-SmartAction® motion sensor automatically turns fan on when you enter the room-Humidity sensor detects rapid rise in Relative Humidity (RH) and automatically turns fan on to remove moisture to help prevent mold and mildew-Can be used to comply with ASHRAE 62.2, LEED, CALGreen and California Title 24-Lighted models now feature (2)13W self-ballasted GU24 base CFL lamps-UL listed for tub/shower enclosure when used with a GFCI protected circuit-Fits in 2 x 8 construction-3-year warranty on parts, 1 year on CFL lamps