Forced Air Gas Furnace Life Expectancy

See exhibit 5 s5 the life expectancy of a unit or system is less than one year.

Forced air gas furnace life expectancy.

The quality of the equipment. Between 15 and 20 years. 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. There are a number of contributing factors that determine the age a furnace reaches.

Some sources report the average lifespan of a gas furnace to be only 15 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. The predicted lifespan for an electric furnace is 20 30 years while a gas furnace will last on average 10 15 years.

Typically the heat exchanger is the component which defines a furnace. 101 life safety code as identified with a flame spread factor of 25 or less as tested using astm e 84. This pl wxm assumes an existing 70 natural gas furnace. Remember your furnace doesn t run on one component alone.

If you follow this reasoning your 30 year old appliance has already doubled its expected lifespan. Shopping for a replacement furnace in an emergency does not allow time for you to make your best decision. A builder s grade unit may only last 8 to 12 years because it s not built as durably. Furnace life expectancy like any other product will vary greatly for a number of reasons.

The question is how many years can you reasonably expect a furnace to continue delivering warm air. After that time the seals and the fan motor start to wear out. However if a key component such as the heat exchanger or control module fails you re probably better off replacing the furnace especially if the unit is more than about 15 years old. So the answer to the question how long does a furnace last is complicated.

As long as you have scheduled yearly furnace maintenance your furnace should easily last over 15 years. If your furnace is close to this age or older you should begin shopping. So to answer the question of what is the life span of a furnace one must define what the furnace is. Here are some factors that will affect how long your furnace will last.

The average life expectancy of furnaces in homes today is between 16 and 20 years. Of course proper maintenance and the replacement of any worn parts have a bearing on the life expectancy of the furnace. What is the life expectancy of a forced air furnace. The life expectancy of a good quality forced air furnace is about 15 years.