The QS1 Series is the new benchmark in under cabinet hoods in terms of style and value as well as quiet operation thanks to unique axial blade technology. The hood delivers revolutionary performance and the brilliance of halogen lighting for greater satisfaction over standard hoods of the past. The fully enclosed design and aluminum dishwasher-safe filters make cleaning easy. Includes damper/adapter. Ducted or non-ducted recirculation capability makes installation easy in most applications. 3-1/4 in x 10 in adapter/damper and 7 in round adapter included, optional 7 in round damper (BP 87) to prevent backdrafts sold seperately. For non-duct recirculation replaceable charcoal filters are available that simply clip on to the back of the grease filters sold seperately.