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. WhisperLite 80 CFM Ceiling Mounted Fan/Light Combination: * Quiet operation at .25" water gauge * Continuous, trouble-free operation for many years * User-friendly installation * Built-in damper to prevent backdraft * 32-watt compact fluorescent lamp * Panasonic Bathroom Fan-Light features 4-watt nightlight * Power consumption (watts): 14.9 at 80 CFM and 14.7 at 62 CFM * Energy efficiency (CFM"s/watts): 5.5 at 80 CFM and 4.3 at 62 CFM * Speed (RPM): 863 at 80 CFM and 1117 at 62 CFM * Duct diameter: 4" * Mounting opening: 10-1/2 sq in * Grille size: 13 sq in * Dimensions: 11.5"H x 14.17"W x 16.73"D * Weight: 12.57 lbs