YAE1018 Features: * Motor equipped with thermal shut off * Built in backdraft damper prevents outdoor air from entering through fan * Rust-proofed steel fan housing unit * Motor unit easily detaches from housing for wiring and installation * Aluminum reflective coating prevents overheating and maximizes heat output * Air volume: 90 CFM * Noise level- 1.5 sones * Conforms to UL/CUL safety standards when used with gfci circuit wiring * 4" Diameter duct connection * The fan, light, and heater may be wired separately Includes: * 4 Long life 270W infrared heat lamps and 60W center light bulb included * Four function switch included * Easy installation mounting brackets included Construction: * Enclosed AC motor engineered for quiet operation Specifications: * Durable 270 Watt anti-blast hardened glass bulb manufactured for resistance to condensation and water Dimensions: * Dimensions: 11.63" H x 11.25" W x 7.13" D