Hi everyone - I'm new to the forums (lots of good info). This might seem like a very trivial or curiosity question. I've been using a Ponderosa wood stove for many years now (inherited from my grandfather, so it's old - I'm 62). Never had any problems - works great. The stove has 3 dampers on the door - two towards the bottom part of the door spaced equally across and one on top spaced equally across. The 3 together make a triangle. I generally use the bottom 2 dampers and keep the top one closed with no problems. I'm curious if there is any functional reason for having 3 dampers (or was it just the way they built them years ago). Any thoughts or history on this stove?