Product review (3 stars): Intall easy-Duct connection could be better
Just installed this roof cap 1 week ago. The install into the roof was easy and the look is good. I have two complaints about this product. The first is that the down draft flap was not sitting correctly. When in the closed position there was a 3/4 inch gap on on side. I was about to send it back when I reached inside and pushed on it and it snapped into place. Functions and closes properly after that.
Second is the length of the pipe extending through the roof is only ~ 1 inch and makes it a bit difficult to connect the duct work, in addition the diameter is a little on the small side. This makes it impractical to use metal duct tape as the connection method. This requires you to mash the flex duct using a duct clamp and hope you don't create a rip and that it makes a good seal. In my case there is a very small leak. I am debating removing and reconnecting using some tape or rubber to close the gap between the cap outer diameter and the flex duct inner diameter.