Set it and forget it. The Delta Breez SIG110H is a powerful yet super quiet bathroom exhaust fan equipped with an adjustable humidity sensor and adjustable continuous low speed control for the ultimate in convenience and worry-free operation. Air flow of 110 CFM and loudness rating of less than 0.3 sones. Features a DC brushless fan motor for extended reliability. Power consumption of 12.7 Watts with an efficiency rating of 8.7 CFM per Watt. ENERGY STAR qualified and HVI certified.