Broan 433023 is a range hood designed to remove smoke, odors, and grease from the air while cooking. It features a built-in light lens to illuminate the cooking surface and a combination filter to capture grease and other particles. The range hood can be vented to the outside through a 3-1/4" x 10" rectangular or 7" round duct, or it can be used in a non-vented configuration with a non-ducted filter (purchased separately). The range hood should be mounted 18-25" above the cooking surface for optimal performance.