So every time I think I have this stove figured out, I don't. Thought the low heat was due to the air intake not being connected (wrong). So I called the dealer and they suggested switching pellets again. I got some Somerset pellets, really like the low ash, but they seam to get ash on top of the pile in the burn pot. Heat is about the same as the Michigan Wood Pellets. Back to the issue, the colder the weather, the less heat I'm getting and the pellets burn slower. I have cleaned this thing over and over again in the two and a half weeks I've owned it. It is a Harman xxv, if anyone has experienced this problem and has the magic answer please let me know.