I am thinking of installing this OAK adapter this weekend, I have it already its supposed to be warm this weekend as well. I have a exhaust flange that will fit over the hole in my classic bay 1200. http://www.amazon.com/PelletVent-Pro-Fresh-Intake-Flex/dp/B003UKXBXK I plan to go straight out and to the side a bit to miss my exhaust thimble. How do these kits get mounted on the inside drywall anchors? Should it be insulated? If not is condensation in the wall cavity a possibility?