Furnace is applied in the home to create heat in the home because in USA majority home needs furnace to heat their rooms in the winter season. In the furnace system the air is heated and circulated in the room. Depends on the types of furnace you select there are different types of fuel use to run the furnace.
There are different models of furnace are available in the market. It is run on gas, electricity, coal and oil. You need to select the proper model based on the fuel that suits to your needs. The furnace is design in such a way that the dust of fuels get clean in the filter and than it will get circulated in the room.
It is essential to see that the furnace you select must be fuel efficient and it less polluted. The designs of furnace are differ based on the types of fuel based furnace you need to select. It is essential to select the proper furnace that suits to your living room.