Alright, I had money in hand and went to finally make my purchase, a hearthstone clydesdale. I was happy with price of unit, so we started talking about install. From reading these forums I was able to ask the right questions, I think. Something told me to hold off a day or two and post here. Here is the deal, I have a 14ft exterior chimney the specs call for a min 13ft. I inquired if that would be a problem being so close to min height. He said no. I asked if they as part of there installation install insulated liner, figuring that would help draft with short chimney, he said "maybe", but if I wanted insulated liner that the cost of it would triple. I also noticed in the clydesdale manual that the install calls for a seal off plate, which I assume is a block off plate. I inquired if they do that as part of the install, he said no that they just stuff roxal up there. This is a big purchase for me, and it seems like when I asked question about possible performance issues he just kept saying maybe, you never know. What do you guys and galls think about the chimney, do you think I'll have draft issues?