The diagrams illustrate the components of a wood pellet stove and a wood pellet boiler, as well as how they are used to heat a house.
When a wood pellet stove is in operation, the wood pellets are initially loaded into the fuel hopper. The pellets then move into the combustion chamber, where they are burned after passing through the fuel feed. As they burn, the ashes fall into the ash pan below. The heated air rises and is directed toward the combustion fan, which blows it into the surrounding space. Meanwhile, smoke from the combustion is expelled through the exhaust duct.
Similarly, when using a pellet boiler, the wood pellets are loaded into a hopper. From there, they are transferred into the furnace, where they are burned. The smoke rises through the smoke stack, while the ashes are collected in an ash container. Inside the furnace, cold water is heated by the burning pellets. This warm water then flows into the radiators, heating each room in the house. The primary distinction between the two methods is that the stove heats by producing hot air, whereas the boiler heats using water.