About 1 1/2 weeks ago I spoke with a few members about my chimney which is 11.5 x 7.5. They said to reduce it to 6 inch. My chimney goes down about 5 flue liners and then angles over about 30 degrees and then goes straight down. Its about a 19 foot run. When I spoke with the stove dealer, he suggested installing a flexable stainless steel 5.5 inch liner so I would not have problems getting it into the chimney. I don't know if 6 inch would give me trouble. Has anyone installed a 6 inch liner when the chimney has an angle? Also, do they make adapters to go from 5.5 to 5 inch because I am looking at a Jotul, a Lange or a Cawley Lemay?