I finally completed the install of my Quadrafire 7100 and have had my first 4 or 5 fires in it. So far it has been working great and am not having any draft/smoke issues what so ever. My wife loves it as much as I do. I haven't enclosed it yet with stonework and so I can still reach up and touch the first two 36" sections, up until in goes into the radiation heat shield at the ceiling. During operation the pipe OD gets pretty hot. Not crazy hot - I can still keep my hand on it and if feels basically like the bottom of a pretty hot laptop, maybe a little more when it's really going (130F). I wouldn't have given it much thought except for reading some posts in the past where some wrote that their Duraplus chimney pipe was cold to the touch and snow was actually building up on the pipe with a raging fire inside. I also noticed the pipe is actually coolest nearest the connection on the fireplace and gradually gets warmer the higher it goes. Anyone have any experience they can share with how hot the OD of the 8" Duraplus pipe typically gets?