Powerful 500 CFM internal blower Bright Quad Halogen Lighting (bulbs included); 3 intensities 3-speed electronic push control with blue speed selection indicator Control features Delay-off and Filter clean reminder Optional remote control operation – BCR1 (sold separately) Quick-release aluminum filters Designed to work with Broan Automatic Make-up Air Dampers Heat Sentry™ detects excessive heat and adjusts blower to high speed automatically Telescopic flue accommodates ceiling heights 8' to 9'; optional flue extension for either ducted or non-ducted 9' to 10' ceilings can be purchased separately