Don’t let your morning shower leave you all steamed up! bathroom fan series with humidity and motion sensor provides just the right balance of style and performance so your bathroom “breathes” properly. The fan automatically “kicks up” from a continuous low CFM to a higher CFM speed when the humidity exceeds the preset humidity level and continues to run until the humidity levels fall below the preset setting. The fan with DC motor technology consumes up to 70% less energy than conventional bath fans which means the fan motor runs cooler and improved fan life. Rust-resistant steel housing unit with a built-in backdraft damper. ETL/cETL listed for use in tub/shower enclosure when used with GFCI branch circuit wiring.