It's the only ENERGY STAR rated vent fan to incorporate dual motion and humidity sensors for moisture control.
Dual Motion and Humidity Sensor Technology
WhisperSense 80CFM fan features exclusive, dual motion and humidity sensor technology. SmartAction® motion sensor automatically turns fan on when you enter the room. Humidity sensor detects rapid rise in relative humidity (RH), turning fan on to remove moisture and help prevent mold and mildew. Can be used to comply with the latest codes and standards.
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