Product review (4 stars): Does not include 7" round adapter
I installed this hood today and had to drill some holes in the sides due to the existing cabinet configuration.  This hood replaced a similar, 32 year old Nutone hood with a 7" round duct.  The information given here states that a 7" round adapter is included.  But, IT IS NOT included, and the owners manual and installation instructions DOES NOT list the adapter as part of the package, and the specification sheet states that the adapter must be purchased.  The hood seems fine so far (owning it less than a day), but if you have a 7" round duct you will have to supply an adapter.  This fact can make the installation much less simple than what is implied by another review of this hood.  I suggest reading both the specification sheet and the installation/owners manual prior to purchase.