Product review (5 stars): kitchen vent with vinyl siding
Excellent. Added adjesive pipe wrap, Frost King IT30 1/8" thick or equivalent, as a gasket material and aluminum tape to seal around. It is sturdy and the damper has a good seal. I improved the sealing by adding the adhesive pipe wrap. Highly recommend this vent with or without the modifications I made.

Since we have siding we also had to purchase a "Builders Edge Recessed Jumbo Mounting Block", choose color according to your siding/trim. Used the following video to learn how to properly install. [...]