Broan Heat Sentry(R) detects excessive heat and adjusts the blower speed to prolong the life of the product and provide proper ventilation, ADA compliant, remote operation is possible using a standard UL approved wall switch, 450 Max bower CFM operates at 0.5 sones at normal speed, Compatible with optional Broan Make-up Air Dampers (sold separately) to fit 6", 8" or 10" ducting and help to balance the air pressure when the range hood is in use, keeping your environment comfortable and meeting local codes, 3-Speed electronic pushbutton control incorporates an LCD display to show hood status for fan and light setting, filter clean reminder, Heat Sentry(R) and delay off, Dishwasher-safe, deluxe micro-mesh filters provide highly efficient grease removal and patterned cover provides a decorative complement to the hood design., The Captur(TM) system advanced blower design features a forward positioned centric inlet to remove smoke and odor faster, The filter clean reminder ensures they will always maintain a high level of efficiency, EZ1 brackets make it easy for single-person installation in less than half the time of traditional methods