I've had my stove since mid Feb. last year. I spent a lot of time that remainder of winter trying out different brands of pellets. I was able to observe the differences in the ash and byproduct after they were burnt. I really couldn't tell if one was burning hotter than the other. There are so many variables like outside temps, stove setting, length of burn, etc. The stove heats the house well no matter what pellet I used. I just want to find out what I'm looking for in a good pellet. I heard the lignetics were good yet they left boulder sized clinkers in the pot. I never really had clinkers like that before. The penningtons filled the inside of the stove with a gritty ash at a rapid rate but had no clinkers with them. Is there a standard test or way of knowing when the stove is running better or worse?