Hello I have a Hampton HI300 Insert. My problem is that I can’t get a good overnight burn or any lengthy burn before all the wood I load turns into coals. I get the stove up to a good temperature and gradually lower the air intake and the fire is burning good, but only seems to produce flames for a 2 – 3 hr period before the t just turns to a bunch of red coals. I load the stove up with a good amount of wood with a variety of wood. Does anybody have any suggestions? I’m sure this question has been asked a bunch of times, I’m sorry for the redundancy.