i am installing my new 30nc in my fireplace. I have installed 15ft of 6" - 316t insulated flexible chimney liner. stove is in place but I have not hooked it up yet. I am debating on whether or not to install a damper above stove . my gut was to install one,...... but after a little searching here, from what I have read,.... I am leaning against it in my situation. would like some feedback from other 30nc owners on this subject?