Thank you for your question on the model L500K kitchen ventilation system. The L500K can be installed in a ceiling or a wall (as long as you have enough depth). The duct adapter coming off of the unit is 4-1/2” x 18-1/2”. You can keep the duct work this size or convert it to 10” round. You cannot use anything smaller than 10” round.
Date published: 2014-01-17