The Panasonic WhisperGreen-Lite FV-08VKSL3 Ceiling Mount Bathroom Fan - ENERGY STAR is equipped with a Custom Vent Variable Speed Control that allows the fan to run continuously at a pre-set lower level that can be elevated to a maximum of 80 CFM. It incorporates an enclosed DC motor that provides a high efficiency performance and it is permanently lubricated. It includes ENERGY STAR qualified 32-watt compact, flicker-free fluorescent lamps and a 4-watt night-light.