An oil furnace is the heating component in some systems in colder weather climates, most commonly in the northeastern United States. It converts oil to heat. Another option is a gas furnace that uses natural gas as its fuel instead of oil. The main components to a furnace include burners and heat exchanger, blower and controls. Trane gas and oil furnaces are built to perform again and again, year after year. Beyond performance, we also provide options for energy-efficient operation.