I have to install a stove in the next couple of weeks and I have to decide at last which spot it will go. My Fave/ideal spot has the ceiling height at 83 inches/6feet 11inches. the stove flue will be at approx 27 inches from the floor. this leaves about 56 inches/ 4 feet 8 inches of space to the ceiling. if I ad 5 feet of chimney on top of this, it will total 9 feet 8inches of chimney. Assuming that the wood I burn is in a fair state of dryness, would the chimney be too short for my stove to burn properly? In the Jotul installation data sheet, it says the chimneys should be a minimum of 15 feet. Can this be altered. thank you.