Do you know how your gas furnace works? You probably have a basic idea: gas burners heat the air and this air goes into the ductwork to the rooms. You don’t need to have more complex knowledge than that to enjoy heat from your furnace, especially since you’ll need to have professionals handle any services you need for it.
But you can benefit from knowing more about the basics of how your furnace works. More knowledge makes it easier to understand when the furnace is malfunctioning and requires service. It can also help you with safe practices.
Temperatures have dropped down to the point where you’ve probably turned on your home’s furnace at least once—and you can expect it to stay running for longer stretches as we move into another cold winter. 
