Optional remote control operation - BCR1 (sold separately), 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, Bright dual halogen lighting (bulbs included); 3 intensities, Control features Delay-off and Filter clean reminder, Quick-release aluminum filters are dishwasher-safe for easy cleaning, Powerful 650 MAX blower CFM operates at a quiet 2.5 sones at normal speed., Designed to work with Broan Automatic Make-up Air Dampers, Heat Sentry(R) detects excessive heat and adjusts blower to High speed automatically