There are four types of furnaces: natural gas, electric, oil, and propane. "If you see a visible flame or hear a burner sound while it's operating, you have a gas furnace," says Max Veggeberg, CEO and ...

Learn all about your furnace pilot light — where it is, what it does, and how to troubleshoot the most common issue.

A furnace is a heating system that uses gas, oil, or electricity to heat the air and distribute it throughout your home via ductwork. Furnaces are typically found in homes with central heating ...