I have placed a magnetic flue temperature gauge left over from the wood stove days on the front door of the pellet stove-just to see what temps I am running at different levels of heat and different amounts of draft. Sorta gives me a reference point so that I can see some consistency in the amount of heat I'm getting. Yesterday,I bought some bags of different pellets that were on sale-very wise to try them before you ever commit to a whole ton! They looked good,smelled nice and were extra long compared to what I was using before. Since its been really cold here lately,I've been running the pellet stove wide open and the highest temperature that my magnetic gauge would register is 350 degrees F. Now, when I replaced with the new kind of pellets that I bought,the highest I could register was 280 degrees! Quite a difference. Wanting to make things fair,I broke up all of the long pellets in the new batch,thinking that it may be causing bridging and reducing the amount of fuel. The stove was hot when I tried this experiment and gave ample time for heating up,but when I added my old brand of pellets,the temperature shot up to where it used to be-350 degrees.The only redeeming factor for the new pellets that I brought home may be that they have less ash and keep the glass cleaner-hard to say for sure but wouldn't but them just for that,if they have that much less heat.