In the United States, there are three main fuel sources which can power your furnace to heat your home: electricity, natural gas, and propane. An electric furnace uses electricity to produce heat and to propel the heated air through a central heating system. Within the furnace, electricity powers multiple heating elements. Once the heating elements are warm, a fan pulls the surrounding air through the unit. Then, the heated air is propelled through the duct work into your home to warm up the space. Although electricity can be costly, in homes without access to natural gas or propane, an electric furnace can be a great choice. Additionally, electric furnaces are very efficient compared with other types of furnaces in terms of heat loss.