There are four main types of furnaces: natural gas, oil, electric, and propane. Electric furnaces can heat the air by exposing heated elements, while other types of furnaces typically require a heat exchanger or chamber that warms the surrounding air. Finally, the thermostat signals the furnace to shut off when the set temperature is reached.

There are four main types of furnaces: natural gas, oil, electric, and propane. while other types of furnaces typically require a heat exchanger or chamber that warms the surrounding air. Natural gas furnaces are highly economical and widely used throughout the US.

The main types of furnaces are electric, natural gas, propane, and oil. Even though these all heat a home, they are powered differently and have different pros and cons. Nally says, “The fuel source will impact the source—with gas furnaces being more expensive.”