Control features Delay-off and Filter clean reminder, Heat Sentry(R) detects excessive heat and adjusts blower to High speed automatically, Bright Quad Halogen Lighting (bulbs included); 3 intensities, 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, 3-speed electronic push control with blue speed selection indicator, Optional remote control operation - BCR1 (sold separately), Powerful 520 Max Blower CFM internal blower, Quick-release aluminum filters, Designed to work with Broan Automatic Make-up Air Dampers