The wood pellet stove is a relatively new concept to the UK, although they have been widely used in both North America and parts of Europe for many years. Using pellets made from the by-products of the wood processing industry, these are automatically fed into the wood pellet stove to maintain the demand for heat and hot water. There is now a UK network of pellets suppliers that use sustainable sources of wood, and with the new environmental awareness wood pellet stoves are growing in popularity.