ENERGY STAR® Products that are ENERGY STAR-qualified prevent greenhouse gas emissions by meeting strict energy efficiency guidelines set by the U.S. Environmental Protection Agency and the U.S. Department of Energy. The ENERGY STAR name and marks are registered marks owned by the U.S. government, as part of their energy efficiency and environmental activities. WhisperValue 80 CFM Super Low Profile Ventilation Fan: * Technology that boots performance * Super low profile housing design * Power consumption (watts): 23.3 at 80 CFM and 23.6 at 65 CFM * Energy efficiency (CFM"s/watts): 3.4 at 80 CFM and 2.8 at 65 CFM * Speed (RPM): 878 at 80 CFM and 1026 at 64 CFM * Mounting opening: 10-7/8 sq in * Grille size: 13 sq in * Gross weight: 9.7 lbs