Here's another tip. The HITZER stoves have a ledge at the left and right side of the fire box , just above the grates. Ash builds up on them ledges. Every two or three days , run a poker down through the coals , and fluff the coals up BEFORE shaking. Do it twice at each side , and once about 1/4 way in from each side. I found it is also better to use the ash pan air inlets , along with the dial draft on the back. Reason being , if you are useing the back draft only , you are cutting all air off to the fire. When the flapper finally pops opens , the stack temps really climb up there untill entire mass of stove is up to temperature , and flapper gets stuck to magnet again. When useing the ashpan vents , the fire always has air to it , and will respond nicely when back flapper pops off magnet and opens. Start out with the holes in ash pan door looking half moon shape. The back dial pionting strait up. The HITZER really shines when the two drafts are working in harmony.