WhisperFit DC Fan / Dimmable LED & Nightlight is an ideal retrofit solution. Built-in energy efficient ECM (DC) motor with Pick-A-Flow® airflow selector allows you to select required airflow (50, 80 or 110 CFM). Single-hinged Flex-Z Fast® bracket, pre-installed alignment guides, and temporary clip allows for flexible, fast and easy installation. Can be used to comply with the latest codes and standards. KEY FEATURES Revolutionary ECM motor with SmartFlow™ Technology ensures optimal CFM output Built-in Pick-A-Flow® airflow selector allows you to select your required airflow of 50, 80, or 110 CFM with a simple flip of a switch Lighted model incorporates one 10W dimmable LED chip panel with <1W LED night light for warm, long-life energy efficient illumination (night light must be wired separately) Single-hinged Flex-Z Fast® bracket provides flexible, fast and easy installation Can be used to comply with ASHRAE 62.2, LEED, IAP and California Title 24