Other sources estimate that the average lifespan for a modern furnace is between 15 to 30 years.
Trane gas furnace life expectancy.
If you follow this reasoning your 30 year old appliance has already doubled its expected lifespan.
The question is how many years can you reasonably expect a furnace to continue delivering warm air.
Air conditioning unit life expectancy.
Furnace life expectancy like any other product will vary greatly for a number of reasons.
The average service life of a gas furnace is about 15 years but the actual life span of an individual unit can vary greatly.
Typical american standard furnace heat exchanger warranties are 20 or 40 years.
A builder s grade unit may only last 8 to 12 years because it s not built as durably.
Between 15 and 20 years.
The life expectancy of a furnace depends on several factors.
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.
Many owners elect to replace units closer to 10 15 in order to upgrade to a more efficient model.
There are a number of contributing factors that determine the age a furnace reaches.
The quality of the equipment.
With regularly scheduled maintenance your furnace could last anywhere from 15 years up to 25 years.
So the answer to the question how long does a furnace last is complicated.