For a bathroom, a noise level of 2 sones or less is considered quiet. However, some fans may be as loud as 4 sones or more.
Energy Efficiency
The energy efficiency of a vent fan is measured by its Energy Star rating. Energy Star-rated fans meet certain energy efficiency standards set by the U.S. Environmental Protection Agency (EPA).
Energy Star-rated fans can help to save energy and money on your utility bills.
