I used my new Master Forge Double Door smoker the other day. I had two 4.5# butts in it. Mild day, light, but consistent breeze. About 80 or 85 degrees. Had plenty of propane. I ran it about four or five hours (had to hit the road and finish them in the oven when I got there). I was never able to get it over about 235. I played with the vents. This unit has a vent/damper on each side of the burner at the bottom, and it has a vent on the chimney up top. A lot of people were losing smoke because of a crappy door seal. But I installed a fiberglass rope gasket as soon as I got it so that isn't a problem. I had the gas wide open and the burner wide open. I don't know what else to do short of wrapping it in a big blanket that won't catch on fire. Any thoughts? I don't need a whole lot more heat. I cook most things around 235-250. But still, I want to be able to at least get to 250. But I'd like to hit 300 for when I want to run some chicken hotter or something.