I am looking a two manufacturers, Harman and Quadra-Fire, I have this article from another forum and wonder if anyone can way in on this question. What about possible fires caused by the two different technologies used in the manufacturer of theses pellet stoves! Thanks for the help. "Harman and Quadra-Fire use 2 different technologies. Harman is a bottom feed (pushes pellets from the bottom of the stove); whereas Quadra-Fire is a top feed (it drops pellets down a tube into the firepot). Be careful listening to salespeople. They will push their product not because they are dishonest; but because they tend to be mis-informed about the competitor's products. Bottom-Feed (Harman) has the advantage of requiring less cleaning of the firepot area (it pushes out ash and clinkers as it feeds pellets). There is inherently more danger of fire in the hopper with a bottom feed stove; just because of the way they are designed. Harman is an excellent product, by the way. Top-Feed (Quadra Fire and many others) require more frequent cleaning of the burnpot (usually daily). Ashes and clinkers basically "pile up" until you clean it out. There is very little danger of fire in the hopper; because the pellets drop down a tube to get to the firepot. "