The power of a 4-speed motor adds to the precision of this under-the-cabinet ventilation system that pairs well with most 30-inch cooktops and ranges. The under-the-cabinet design allows you to hide ductwork inside cabinetry for a more built-in look. 600 CFM/65K BTU Threshold Allows installation over any KitchenAid regular 36- or 30-inch range or cooktop, and some commercial-style cooking surfaces with outputs up to 65K BTU. 4-Speed Electronic Touch Control With LED Display Provides sleek, visual confirmation of your ventilation selections, settings, and filter status. Whisper Quiet® System @ 44 DBA (1.3 Sones) At Low Speed Ensures that the ventilation system operates at a quiet level so it can be used while entertaining. At maximum speed, sound level is 68 dBA (7.0 sones). Dishwasher Safe Grease Filters Filter reduces steam, grease, and odor to help avoid contact with ceilings and countertops. The design increases filtration by obstructing the path of vented air to help capture more steam, grease, and odors as they are drawn through the vent. Easy In-Line Conversion Converts from a traditional set-up to an in-line blower installation for an even more quiet operation. Metal box purchase required.