I just installed a model 1800 wood/coal furnace. I burned it last night and man does it pump out the heat. My question is should I have a damper installed in the flue pipe to kinda choke the stove down some. The previous owner did not use one in the 5 years he had it. It does have a baffle rod and plate to redirect flue gases up over the bricks. My 1500 didn't have this so I had a damper in the pipe. I am burning wood only no coal.