I want to move my flue over, so that I can get more head room in my basement. I've looked at various web sites for information on how many bends I can make with the trane xe90, but can't find any. I see how long the pipe can be and the pipes dimension. Can someone point the way or do they know the answer? Does it even matter? Overall, the pipe will only lengthen by 3 feet. The total distance will be around 36 feet for the pipe with four/five 90 degree bends. At one point the pipe will go down then back up. Any help would be appreciated.