So as some of you know, after a few seasons of trial and error, I finally have good draft on my Hearthstone Heritage. Maybe too good. I can only fill the stove about 1/2 way or else the stack temp climbs to at least 500 degrees with the air completely closed. (I know there is no such thing as completely closed anymore). Anyway, I'd rather have all that heat going up my stack heating the room instead which is where the idea of a damper comes in. I'm using single wall pipe, total chimney height is 18'. Will a damper do the trick or should I not waste my time and money?