I cannot believe there can be such a difference in pellets. Newbie here, first year of burning pellets and I must say I was a little disappointed in the output of heat from my Big E. I have burnt about 8 bags of pellets with a whole lot of ash. My window gets really sooty and dirty daily. I purchased three tons of Athens pellets back in June. They are all nicely stacked down in my basement. What a disappointment. Where I work we are selling Lignetics. I bought three bags, and decided to check out any differences. Let me tell you, I cleaned the stove, loaded with two bags of Lignetics. It has been burning since 7:00 last night. I have it on thermostat so it ran on #1 setting basically all night. The window is nice and clean, hardly any ashes and the heat output is AWESOME. #1 setting feels like the #3 with the Athens pellets. And the #3 setting will blow you away. Wow, wish I hadn't done that. I think maybe I will try to mix them. What does anybody think???? I never would have guessed there could be such a difference. Live and Learn. I think I will check out other pellet brands too (for future purchases). Any body have any favorites???