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How Long Will My New HVAC System Last?

New HVAC System

Whether you own or rent your home, you must maintain your heating and air conditioning unit. With proper maintenance, most HVAC units can last anywhere between 15 and 25 years. But, the lifeof your system depends on the quality of install, type of system and even where you live.

Conditions That Affect Lifespan

The lifespan of your unit not only depends on the type but also on how it’s maintained. Both improper installation and maintenance can shorten its lifespan. Improper usage can also affect your system’s lifespan. This can include setting the temperature too high or too low.


Most gas furnaces last around 15 years. With proper maintenance, some models can last as long as 30 years. Installation, efficiency, ventilation and routine maintenance can all affect a furnace’s lifestpan. Repairing a furnace only when it’s stopped working will shorten its lifespan. This is why having an HVAC professional check yours at least once a year is important.

Air-Conditioning Units

There are many types of air conditioning units, and each one has its own average lifespan. Central AC and ductless mini-splits last between 15 to 20 years. The size of the unit will impact how long it works. Central air conditioners that are too large for your house can wear out faster. This is due to the strain placed on the compressor.

Compressors are expensive to replace. If your unit is already too big for your home, it’s best to upgrade to a newer model. How much you use it also factors into an air conditioner’s lifespan. This is especially true when you look at how it’s regulated and maintained. Failure to clean ducts, replace air filters or get repairs will lead to early failure.

Heat Pump

Heat pumps last around 10 to 15 years, but newer models can last longer than that. An air-source heat pump might last longer than a water-source heat pump. But, a dual-source heat pump tends to last the longest out of all three models. They can perform the job of a central heating and cooling system for less energy. But, heat pumps tend to wear out faster in cold climates. Harsh winters could result in the need for a secondary heat source.


Boilers last approximately 15 years. They can be a cost-efficient heating solution for many households. But, because they connect to the plumbing, they can breakdown due to frozen or burst pipes. Because of this, you should with an HVAC professional about proper boiler insulation.

If you’re still wondering how long your unit will last, we’re here for you. Contact Cahill Heating, Cooling, Electric, Plumbing & Sewer and Air Conditioning to schedule an appointment. We’ll make sure your HVAC unit stays running like new.

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