The Panasonic FV-0511VQC1 WhisperSense DC bathroom fan features an ECM motor with SmartFlow technology and a Pick-A-Flow speed selector switch that allows you to select your required airflow (50-80-110 CFM). Flex-Z Fast installation bracket with articulating joints is ideal for positioning the bathroom ceiling fan exactly where you want it, in old or new construction. An integrated dual 4 in. or 6 in. duct adapter gives greater flexibility in duct layout and design. The Dual Sensor Technology (motion and moisture) provides built-in redundancy for the ultimate tool in automatic moisture and odor control. It can also be used to comply with the latest codes and standards. ENERGY STAR certified vent fans meet strict parameters set by the US Environmental Protection Agency.. Air Volume (CFM): 110,50,80. Amperage (amps): 0.075,0.11,0.18. Color/Finish: White. Duct Compatible Sizes: 4 or 6 in. Features: Adjustable Fan Speed,Humidity Sensing,Motion Sensing,Timer. Grill Shape: Square. Housing Material: Galvanized Steel. Included: No Additional Items Included. Installation Type: Ceiling. Maximum Room Size (sq. ft.): 110. Mount Type: Flush Mount. Pack Size: 1. Product Weight (lb.): 9.48 lb. Room Size: Large Room Fan. Voltage (V): 120 V. Wattage (watts): 10.5,4,5.8. Housing Length (in.): 10.25. Housing Width (in.): 10.25. Product Height (in.): 8.5 in. Product Width (in.): 13.00 in