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. WhisperWarm 110 CFM Ceiling Mounted Fan/Heat Combination: * Add a little warmth for those cold days * So quiet you might not know it"s on * Continuous, trouble-free operation for many years * Power consumption (watts): 30.7 at 0.1" static pressure and 30.5 at 0.25" static pressure * Energy efficiency (CFM"s/watts): 3.6 at 0.1" static pressure and 2.9 at 0.25" static pressure * Speed (RPM): 778 at 0.1" static pressure and 935 at 0.25" static pressure * Duct diameter: 4" * Grille size: 18-1/8"L x 13-5/16"W * Weight: 20.1 lbs