Description : A pellet stove is an appliance that burns compressed wood or biomass pellets to create a source of heat for residential and sometimes industrial spaces. By slowly feeding fuel from a storage container (hopper) into a burn-pot area, they create a constant flame that requires little to no physical adjustments. Pellet stoves can be either free-standing units or fireplace inserts vented into an existing chimney. The pellet stove has changed in appearance over the years from a simple, boxy workhorse design, to a decorative heating appliance.