This thing looks huge compared to my Keystone but I could actually slide it back further and have more room in front. I had the dealer do the install, sure is nice not having to move these heavy things around. I'm using Security double wall pipe with a 20" vertical rise off the stove top with slip pipe, 2ea 45 elbows, 2' horizontal run into an 18' Supaflu 6" chimney. The stove collar was smooth and didn't require an adapter. I still have to connect the OAK but here's some pictures