A motor turns the auger which feeds pellets into the firebox. There, a hot rod automatically ignites the pellets, and a combustion fan below keeps them burning. Vents vertically line the inside of the Firebox creating a circular air flow. A fan inside the Pellet Hopper maintains positive pressure which prevents burn-back in the auger tube. When met these two air flows create the ultimate wood burning fire circulating pure hardwood smoke flavor.