Quadrafire pellet stoves, Harman pellet stoves & Enviro pellet stoves burn wood pellets. These stove pellets actually are recycled sawdust, wood shavings, corn, walnut and peanut shells, and similar biomass wastes that are ground up into small pellets, compressed and extruded for use in your stove.
Both because of a pellet stove's fuel's consistency and because of the stove's combustion mechanics, pellets burn very hot. This means they burn more efficiently and cleaner than wood. Intense compression squeezes the moisture out of pellets, dropping their moisture content to below 8%, which is very dry compared to cord wood that has from 20% to 30% moisture. The dryer the fuel, the more heat it can produce, and the high-temperature fire burns more of the fuel.