Looking to increase efficiency of my smoke dragon and was thing about draft induction. It seems that as the fire dies down, if somehow the dampers could open a little like a spring on the stove pipe thermometer. Or maybe something to draw/push air. I ran across this http://www.draftinducers.com/ad1.htm and was wandering about putting it on a thermostat. Has anone tried this or know if it would work?