WhisperCeiling® DC™ Precision Spot Ventilation Fan with built-in Pick-A-Flow® speed selector switch allows you to select your required airflow (50-80-110 CFM). Features a ECM Motor with SmartFlow® technology and a Flex-Z Fast installation bracket. Can be used to comply with the latest codes and standards. KEY FEATURES Revolutionary ECM motor with SmartFlow™ technology for optimum CFM output Pick-A-Flow® Speed Selector – one fan, you choose the CFM (50, 80, 110 CFM models) Flex-Z Fast bracket provides flexible, fast & trouble-free installation, even from below the ceiling Lighted models incorporate one long-life, 10W dimmable LED chip panel with