A central heating system distributes heat throughout the living space by a duct system which is attached to the furnace located in the attic, basement or closet. Williams’ furnaces are mounted on a wall or free-standing in the room. They are not attached to room ducts, but most models must be vented. Depending on the size of your room or home and your climate, a Williams’ furnace may heat your entire home or can be used to heat zones in your home. Zone heating can save your money on your heating bills because you heat only the room you are in and turn the temperature down on your central or main heating system.