![Broan® Flex™ ENERGY STAR® Certified Humidity Sensing Ventilation Fan 4 in. Round Duct, 80CFM, 0.7 Sones, 120Vac Broan® Flex™ ENERGY STAR® Certified Humidity Sensing Ventilation Fan 4 in. Round Duct, 80CFM, 0.7 Sones, 120Vac](https://www.siglers.com/media/catalog/product/cache/0befdba2c05cf57d2b95e9bff2d29788/A/E/AE80S.png)
Broan® Flex™ ENERGY STAR® Certified Humidity Sensing Ventilation Fan 4 in. Round Duct, 80CFM, 0.7 Sones, 120Vac
![Sones phons loudness decibel sone 0.2 - 0.3 - 0.4 - 0.5 - 0.6 define sone rating conversion dB level dBA phon phone volume intensity calculator dB dBa and Sone relate fan Sones phons loudness decibel sone 0.2 - 0.3 - 0.4 - 0.5 - 0.6 define sone rating conversion dB level dBA phon phone volume intensity calculator dB dBa and Sone relate fan](https://sengpielaudio.com/RoomSonesTable.gif)
Sones phons loudness decibel sone 0.2 - 0.3 - 0.4 - 0.5 - 0.6 define sone rating conversion dB level dBA phon phone volume intensity calculator dB dBa and Sone relate fan
![Amazon.com: Broan QT130E QT™ 130 CFM 1.5 Sone Ceiling Mounted Energy Star Certified Bath Fan with Galvanized Steel Housing - N/A : Tools & Home Improvement Amazon.com: Broan QT130E QT™ 130 CFM 1.5 Sone Ceiling Mounted Energy Star Certified Bath Fan with Galvanized Steel Housing - N/A : Tools & Home Improvement](https://m.media-amazon.com/images/I/714qzXk3dKL._AC_UF894,1000_QL80_.jpg)
Amazon.com: Broan QT130E QT™ 130 CFM 1.5 Sone Ceiling Mounted Energy Star Certified Bath Fan with Galvanized Steel Housing - N/A : Tools & Home Improvement
![Cyclone HushTone 1.1-Sone 150 CFM Off-White Bathroom Fan with Speaker - Energy Star Certified LSE150BT | RONA Cyclone HushTone 1.1-Sone 150 CFM Off-White Bathroom Fan with Speaker - Energy Star Certified LSE150BT | RONA](https://cdn.rona.ca/webassets/images/330899267_MainImage_001_l.jpg)