Product Description The Delta Breez GreenBuilder GBR100 is the perfect combination of power, quality and performance in a bath fan, and at a value price. Air flow of 100 CFM with loudness rating of 1.4 sones. Features a DC brushless fan motor for superior reliability and efficiency, and extremely low power consumption. The fan operates using 12.6 Watts with an efficiency rating of 7.9 CFM per Watt. Easy to install; smaller size than most performance fans on the market. ENERGY STAR qualified and HVI certified. From the Manufacturer The Breez Ventilation Fan combines several design innovations, including a switching power supply and DC brushless motor to provide a quieter solution with energy savings up to 74% compared to similar products. The Breez Ventilation Fan is easy to install