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So, to answer the question of what is the life span of a furnace, one must define what the furnace is. Typically, the heat exchanger is the component which defines a furnace. In older furnaces, the heat exchanger was good for about up to 15 years, with a high-end expectancy of 20 years if regular maintenance was performed.


A good place to start is to compare your oil or natural gas furnace age to the national average. The average lifespan of furnaces in homes today is between 16 and 20 years. Contact Petro Home Services to learn more.


If your furnace is getting older, you may be wondering how long you can expect it to last. The average service life of a gas furnace is about 15 years, but the actual life span of an individual unit can vary greatly.There are a number of contributing factors that determine the age a furnace reaches:


gas furnaces typically last 20 to 25 years. Furnaces are usually replaced when the heat exchanger fails. Other minor components are typically replaced when they fail. Some furnaces are known by reputation to fail early on a regular basis. Talk to local installers and service people to get a sense of which furnaces are troublesome in your ...


If your furnace were old and worn out, your decision would be easy—buy a more efficient model—but the average life of a well-maintained furnace is 25 years, so yours still has plenty of life in it. If you did replace your furnace with a 97 percent efficient system, you'd cut your heating bills around 20 percent.


An aging gas furnace can develop cracks in the heat exchanger. The cracks may be large enough to emit carbon monoxide (CO) into your home, and if an HVAC technician or the gas provider’s representative finds them, he or she will have to disable your furnace, also known as red tagging.


Lifespan. The average gas furnace will last about 20 years before needing to be replaced. If yours is over 15 years old consider having it replaced earlier than that. By doing this, you will avoid the chance of it breaking down in the middle of winter. Extending Furnace Lifespan.


The Average Age for Gas Furnaces. Estimates for the average lifespan of a gas furnace vary widely. Some sources report the average lifespan of a gas furnace to be only 15 years. If you follow this reasoning, your 30-year-old appliance has already doubled its expected lifespan.


Average life of gas furnace? it depends on how well maintaned it is should be inspected every year ,please do not go to one hour furnace they will tell you you need a knew one when you don't


5. Check Your Gas Valve and Pilot Light – If all these steps have failed to start your furnace back up, you may have an issue with your gas valve or pilot light. If the pilot light has gone out in your furnace, you need to relight it. First, go to your gas valve and turn it off.