Energy Material: The level of energy stored inside of a device mass of pellets, usually expressed in kWh/kg or BTU/lb. A pellet stove is actually a heating appliance that burns compressed Wooden or biomass pellets to make a source of warmth for residential and sometimes industrial spaces. By bit by https://simonetjyn.wikimillions.com/4439898/the_basic_principles_of_pellets_kwh_per_kg