Four-way convertible; installs ducted 3-1/4 in. x 10 in. (vertical and horizontal), 7 in. round (vertical) and non-ducted. Non-Ducted Filter sold separately - Model 41F 160 CFM, 6.5 Sone (3-1/4 in. x 10 in. discharge) or 190 CFM (7 in. round discharge) performance HVI 2100 Certified Dishwasher-safe aluminum grease filter A protective lamp lens distributes light evenly over the cook-top and accepts up to 75W bulb (bulb not included) Includes 3-1/4 in. x 10 in. damper/adapter and 7 in. round adapter