Panasonic
Made for quiet operation, WhisperGreen ventilation fans use DC motors, built-in controls, and motion sensors. Operating at 75 percent to 400 percent above minimum energy requirements, the fans have custom variable-speed controls allowing them to run continuously at 30 to 80 cfm. A delay feature keeps fans on for an adjustable amount of time after the homeowner leaves the bathroom. 800-211-7262. www.panasonic.com.