The F40000 series provides installation flexibility with 4-way convertibility to fit virtually all applications. The hood is designed for under cabinet use and installs as 3-1/4 in. x 10 in. ducted opening with vertical or horizontal ducting; or 7 in. round vertical ducting or as non-ducted with air recirculation. The hood is equipped with a 230 MAX Blower CFM designed for years of trouble free service, an easy to clean grease filter, a protective lamp lens that distributes light evenly over the cook-top, and control switches for fan speed and light activation Provides installation flexibility with 4-way convertibility to fit virtually all applications Simple to use rocker switches let you adjust the fan speed and the light setting separately Two fan speeds help you tackle a variety of venting jobs 230 MAX Blower CFM quickly removes smoke and cooking odors from the air Vertical and horizontal exhaust option lets you connect the ductwork to the top or rear of the range hood Removable, reusable, dishwasher-safe aluminum mesh filter for easy cleaning and maintenance; supports ductless filtration via non-ducted filter (purchase separately) Uses up to a 75-Watt in incandescent light to brightly illuminate the cooking area (bulb sold separately) Includes a 3-1/4 in. x 10 in. damper/adapter and a 7 in. round adapter for easy installation (7 in. damper sold separately) Enclosed light and fan/filter assemblies, mitered corners and hemmed edges for good looks and easy cleaning