If you follow this reasoning your 30 year old appliance has already doubled its expected lifespan.
Trane gas furnace life expectancy.
If your furnace was correctly sized for your square footage and installed by a licensed technician you can expect a long lifespan.
Air conditioning unit life expectancy.
Many owners elect to replace units closer to 10 15 in order to upgrade to a more efficient model.
The question is how many years can you reasonably expect a furnace to continue delivering warm air.
The quality of the equipment.
The good news for those who choose to go with a trane ac unit is that these days the expected lifespan for the unit is 15 20 years.
Regardless of the logic you follow the 30 year mark is at or close to the maximum lifespan you should expect from your furnace.
Furnace life expectancy like any other product will vary greatly for a number of reasons.
So the answer to the question how long does a furnace last is complicated.
With regularly scheduled maintenance your furnace could last anywhere from 15 years up to 25 years.
A builder s grade unit may only last 8 to 12 years because it s not built as durably.
Some sources report the average lifespan of a gas furnace to be only 15 years.
Typical american standard furnace heat exchanger warranties are 20 or 40 years.
Other sources estimate that the average lifespan for a modern furnace is between 15 to 30 years.
The average service life of a gas furnace is about 15 years but the actual life span of an individual unit can vary greatly.