No science behind this just observation a candle (the stinky ones in a glass jar) on the stove and how dirty the glass was. so far I have tried Premier,Lg, Fireside,Green team,Barefoot,Maine Woods,Dry Creek,Lignetic,Okanagan,andCubex. so here is my opinion so far this was done with my stove on the lowest setting of 1-1. 1) Number one for me Okanagans they burned hotter than all the rest melted the candle in no time and had the least ash and the glass looked as clean as when I started burning it. 2)Number two Barefoot burned very hot melted the candle fast and didn’t have much ash at all light film on glass hardly noticeable very hot burning 3) number three for me is the Cubex it burned as hot or maybe a little hotter than the Barefoot not alot of ash just a light film on the glass but the reason the Barefoot came out ahead is because in the area I live the barefoot is quite a bit less and it is about the same Quality 4)number four this one will sound crazy to most of you but I found the Green Team pellets to be my number four pellet it put out great heat melted the candle pretty fast it did have more ash than the barefoot but not so much that it would make it a problem the glass had a light gray film and had to be wiped after each bag but it was worth the effort 5)Number five Dry Creek burned fairly hot it melted the candle completely but took about 40 min to do it not too much ash but enough that it filled the burn pot over 1.5 in slight brown film enough for it to show up black on a white napkin 6)Number six Premier even though this is the first pellet I had burned through the stove it put out heat it melted the candle after it was put on the stove and didn’t make the glass dirty enough to have to wipe it but it may have had something to do with it being the first bag through the stove. 7)]Number seven Lignetic burned OK not as hot as the rest the candle melted but it took a long time and never quite got there completely the top layer only ended up with a center hole the right side of the glass was dark brown and it had a lot of ash 8)eight Lg they burned but no ware near as hot as the others the candle didn’t melt all the way through a lot of ash and dark brown glass 9)Number nine Fireside the candle melted all the way after a while but the glass got very dirty even before the bag was done the glass was brown enough that you could see it when you looked at the flame and the ash in the pot built up to the point that I had to empty the pot before the burn was through 10)Number ten sorry to say because I live in Maine but it is Maine Woods I would never buy these again they don’t put out much heat never even melted the candle more than half way and they had quite a bit of ash but no ware near what the firesides had the glass was light brown but did I mention they don’t burn hot