The WhisperFit® DC Fan 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. This fan is perfect for bathroom ventilation. It can be used to comply with the latest codes and standards.