GALVANIZED HOUSING with Plated Sound Absorbing Finish for Humid Conditions & Various Attic Temperatures. Attractive Molded Grille with Diffuser Designed for LED Applications and Spring Clips for Smooth Fit Against Ceiling or Wall. Dishwasher Safe Grille for Easy Cleaning. Designed for Ultra Low RPM for Quiet Operation. Permanently Lubricated Ball Bearing Motor, Capacitor Driven & Rated for Continuous Operation.