WhisperCeiling 290 CFM Ceiling Mounted Fan: * The 290 CFM 2.0 sone APPA30VQ3 Panasonic Bathroom Ceiling Fan offers quiet operation at .25" water gauge * Continuous, trouble-free operation for many years * User-friendly installation * Built-in damper to prevent backdraft * 290 CFM 2.0 sone APPA30VQ3 Panasonic Bathroom Ceiling Fan Power consumption: 64W at 0.25" static pressure * Energy efficiency: 4.1W at 0.25" static pressure * Speed (RPM): 877 at .25" static pressure * Duct diameter: 6" * Mounting opening: 12-3/16 sq in * Grille size: 15 sq in * Panasonic Bathroom Fan Weight: 18.3 lbs