The Delta BreezGREEnBuilder GBR80H is the perfect combination of power, quality and performance in a bath fan, and at a value price. Air flow of 80 CFM with loudness rating of 0.8 sones. This quiet energy efficient exhaust fan features an adjustable humidity sensor and adjustable continuous low speed control. Features a DC brushless fan motor for superior reliability and efficiency, and extremely low power consumption. The fan operates using 9.7 Watts with an efficiency rating of 8.2 CFM per Watt. Easy to install; smaller size than most performance fans on the market. ENERGY STAR qualified and HVI certified.