What Does a Gas Furnace Do

Heat exchanger: The part of a gas furnace that adds heat to the indoor air. The gas combusts inside the heat exchanger, creating heat that is used to heat the passing air. The design of the heat exchanger can add energy efficient operation of a gas furnace. … Gas furnaces come in a variety of shapes to fit your space.

What is gas furnace used for?

A gas furnace is a home heating appliance that runs off of natural gas. The natural gas is ignited in the furnace, warming up the air, which is then delivered throughout the home. A fully functioning gas furnace requires all of its components to be working in sync.

Is a gas furnace expensive to run?

Efficiency can have a major impact on gas furnace operating costs. While it costs around $14.02 to generate 1 million Btu from furnace in the United States with an 82 percent efficiency (based on U.S. average natural gas prices), it costs just $12.10 for the same million Btu from a unit that is 95 percent efficient.