Thank you for your question on the model ACS30 range hood. The ACS30 can be vented horizontally with 3-1/4” x 10” rectangular duct work or vertically with 3-1/4” x 10” rectangular duct work or 7” round. We have 2 wall caps (model 639 and 649) that could be used for venting horizontally. There are two roof caps (model 634 and 644) that can be used whether you are using the rectangular or round duct work.
Date published: 2015-11-09