I can't say anything about the overall ash just yet. I have only burned about 1/2 a bag. I will probably finish them Wednsday morning or so. I will hold my coment on the ash until them. But I am not pleased at all with the heat numbers. I have to bit my tongue now! Don't need to make any waves. There are several long pellets in the bags. About 1 3/4 inches long. Just FYI!