Convertible 30 In. wide range hood can be installed ducted or non-ducted for easy replacement of older hoods. Quiet Hood features a patented air chamber design that significantly reduces noise up to 40% over comparable, conventional hoods. Variable speed control provides effective ventilation for all kitchens. Dual 40 watt lamps increase light efficiency. Includes nightlight option. (Lamps not included). 4-way convertible, installs 3-1/4 In. x 10 In. horizontal and vertical ducted, 7 In. round vertical ducted, and non-ducted. 200 CFM (cubic feet per minute). 18 In. minimum height above cook top. Aluminum filter is included with range hood for ducted installation. For non-ducted installation use replacement filter not included with range hood. ADA (Americans with Disabilities Act) compliant when wired to operate from a dedicated standard 2-rocker/3-rocker wall switch. HVI-2100 certified.