I have the stove in my signature and enjoy it. Flue length is about 16.5 feet with one 22 degree offset right off the stove and then straight up class A pipe inside an interior masonry chimney. The draft control is effective only about the first 1/4. Pulling it out further has no effect. I added 3' of stack to test and it made no difference. Cracking the door makes a big difference. I have no real complaints, but wouldn't mind a bit more draft for vaporizing coals, (with the door latched). The stove burns well as is, but I am curious to hear from others. As I say, the first 25% percent of the draft does everything it is supposed to. How about You?