I was looking to buy a vermont castings vigilant wood stove (used) and the lenghth of pipe from the top of the stove to the top of the chimney recommended by the VC manual suggested that it should be 14 feet....as my roof is flat, the distance from the top of this stove to the surface of the roof would only be about 6 and a half feet. If I was to make the complete 14 foot run, it would be sticking up off of my roof by 7 and a half feet....Needless to say, that might be a little bizarre looking....After having read some of the postings here about drafts, would any lenghth under 14 feet, let's say 10 and a half, be a problem. My only other solution would be to put the stove in the basement....any help would be appreciated....thanks.