
The fan housing is made of heavy-gauge zinc galvanized steel and painted to protect it from rust. This Energy Star qualified product also features super-quiet operation and high CFM-to-Watt efficiency. This Panasonic fan has a built-in damper to prevent backdraft, which helps to prevent outside air from coming through the fan. FV-05VS1 Features: 50 CFM Ventilation Fan, Ceiling Mounted, Super Quiet Operation, Sirocco Blower Wheel, Totally Enclosed Condenser Motor, UL Listed For Tub-Shower Enclosure, Energy Star Qualified, Thermal Fuse Protection, Rust Proof Paint Treatment, Aerodynamic Fan Design, Built-In Damper, Double Hanger Bar, Galvanized Steel For Long Life, Super Slim Design, Easy Installation"
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