The peasant from time immemorial was “fed” mother-button with wood. Then coal and peat replaced them. These are types of solid fuel. Until now, many homeowners prefer to put the stove, considering it the warmth is especially life -giving and useful. Indeed, burning fire, the smell of firewood make the atmosphere of the house of a welcome and friendly. There are also pile boilers. Saws are granules or briquettes made of wood sawdust. If you remove the burner, then you can use firewood.