The BROAN QT20000 range hood combines modern styling and quiet operation to make cooking more relaxing and social. The larger filter area captures steam and odor for a more enjoyable kitchen experience, especially when you're serving a crowd. Ducted or non-ducted recirculation capability makes installation easy in most any application. Patented air chamber design that reduces noise up to 40 percent over conventional hoods, 210 CFM, 5.0 Sones (vertical discharge) HVI 2100 Certified. Infinitely adjustable, rotary speed control. Convertible versatility. Installs as 3-1/4 x 10 inch (vertical or horizontal), 7 inch round (vertical) or non-ducted. (Non-ducted filter sold separately.) Dual 40 W lamps increase light distribution, night-light feature adds safety (lamps not included). Includes 3-1/4 x 10 inch damper/adapter.