I got done building my propane tank smoker and decided to test fire it. The first run I was using wet wood so it wasnt a real good test. Today I was using charcoal and dry wood and I could not get the temo above 250. I have a 26x18x18 firebox on the back of it and a 6 inch hole between the box and smoker. The exhaust is also 6 inches. I had a raging fire inside the fire box and the top of the smoker was too hot to touch. The bottom of the smoker you could lay your hand on. My exhaust stack does go down into the cooker almost to the grates. Can some one suggest something to bring my temps up? I know it is hot enough for smoking but I want to use it as a grill sometimes as well and I think you should be able to get it a lot hotter than it is.