How Many Years If a Gas Furnace Last?

The first time your gas furnace stops putting out heat over a winter night is not the opportunity to consider whether it is nearing the end of its useful life. Warranties typically cover individual components for variable periods and more efficiency, but your furnace might outlive them all. Your furnace might be in good health at age 35, but it’s lived at least 10 years past the average.

Law of Averages

In a report prepared by the Department of Housing and Urban Development in 2000, the typical life of a gas-fired furnace was estimated in 18 decadesago Other estimates average 15 to 25 decades. How frequently your furnace is employed determines tear and wear to components involved in stopping and starting the system, such as fans and digital ignitions. Its efficiency might impact control mechanisms, how much fuel the furnace uses and how much sooting occurs in burners. Regular inspection and cleaning affects efficiency and also identifies components that require replacement, possibly lengthening lifespan.

Once the End Comes

Before replacing your old furnace with a new, super-efficient unit, call your utility company for an energy audit to identify ways to save energy in your house. Gas furnaces might not get enough usage in a Mediterranean-type climate to warrant a 97-percent-efficient unit. On the other hand, a less expensive 80- or 90-percent-efficient unit coupled with increased insulation, duct cleaning or repairs, along with e-glass windows, might pay off previously — and last longer.

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