How To Tell the Age of Your Furnace

March 7, 2022 12:00 am Published by Leave your thoughts

If you have moved into a new-to-you home, it is important that you determine furnace age. This information will help you determine what types of repairs or maintenance will be needed or if the system needs to be replaced altogether. Here are some tips on how to tell furnace age.  

Check the System

In some cases, the age of the furnace will be indicated somewhere on the system itself. Search for any labels on the furnace. You may need to get a flashlight and really search for this information.

Installation or Last Service Date

If the furnace’s age is not clearly labeled, you may need to dig a little deeper and find out when the system was installed or when it was last serviced. The previous homeowner may be able to share this information with you. There may have been documents left in the home or near the furnace that include this information given to you when you purchased the home. If the HVAC manual is available, it may have an installation date available for you.


Some newer model furnaces will have labels, but older models may have serial numbers. These numbers could be hiding deep within the furnace. Before searching for serial numbers, be sure to turn the unit completely off. You can use the serial numbers and make the furnace to track down an age. You should be able to complete this detective work online, but if you are still having trouble, you should contact the manufacturer.

How Long Should My Furnace Last?

The life span of a furnace will be dependent on many factors. The most important factor will be the care and maintenance given to the system. You can expand the life of a furnace through meticulous maintenance. It is also important to make sure you run your furnace the way it was intended to be used.

In most cases, furnaces need replacement about every 15 years. This time could be stretched a little with good maintenance, though. If your home is not very energy efficient, your furnace will work harder during the winter to keep the house warm. This will cause additional wear and tear, and the furnace may need to be replaced sooner.

If you would like to learn more about furnace care and maintenance, or if you need our HVAC services, please contact us at Ken’s Comfort Zone Air Conditioning.

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