I don't understand that statement about the instructions at all, the installation and running of the exhaust and ducting on my furnace was simple and straightforward. I never talked to this "Mike" guy that spent a whole day looking at his installation (how is that even possible?), but the guys I did talk to were great. They did tell me to keep the exhaust run as straight and level as possible, but mostly the whole installation was just common sense, even I managed to do it
. I'm just guessing, but it seems as if the OP must have been satisfied or he would have been back badmouthing Scan.