I get a pretty good burn time. I do however have to deal with a wide range of temperature fluctuations with the full burn cycles. I usually load up at 8pm and have enough heat and coals to reload at 5am. I then reload a half load at 3pm over coals again. Stove room (1,000sf) gets to 80 and the rest of the house is usually around 67-70. I have fans everywhere moving the cold air to the stove room. Took a while to figure it out.