WhisperFit DC Fan / Dimmable LED and 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 allow for flexible, fast, and easy installation. Can be used to comply with the latest codes and standards.