Powerful Three Speed Ventilation Fan Quickly move odors and steam away from the cooktop's surface with three levels of ventilation that recirculate air up to 350 cubic feet per minute (CFM). Lower Noise Operation When using the fans to circulate air, on the lower setting the sones rating is 3.0, equivalent to a face-to-face conversation. The maximum fan sones rating is 5.5, equivalent to busy restaurant. * Lower noise operation with a Min/Max Sones rating of 3.0-5.5. Convertible Exhaust Duct Designed for outdoor (ducted) or indoor (non-ducted) vented installations LED Lighting Get a clearer view of your cooktop with two LED lights that illuminate the cooking surface. Dishwasher Safe Grease Filters Easy to remove, dishwasher safe aluminum mesh filters trap particles and helps reduce odors Push Button Controls Easily select fan speed or lighting level with simple push button controls Professional Design Features a sleek, stainless steel finish and professional-looking design. Charcoal Filter Enjoy fresher air with the replaceable carbon charcoal recirculation filter, which captures odors and helps filter recirculated air from the exhaust fan. Ready for Installation Includes all necessary components for installation, such as a damper, mounting hardware, and flexible ductwork.