What's the Lifespan of an HVAC System?

The HVAC system of your home continually works hard to keep your home comfortable. You rely on it to silently labor to cool your home in the summer, and heat it in the winter. Due to its continual usage, the HVAC system endures constant wear and tear. Which makes one wonder… How long can you expect this workhorse to last before it's time to call in a repair technician? 

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The reality is that there's no one-size-fits-all answer to the lifespan of an HVAC system. Several factors influence how long it will serve you.

Average Lifespan of Common HVAC Systems and Components

An HVAC system comprises several components, so let’s cover the lifespans of each.

Central AC Unit

These workhorses typically hum along for 15 to 20 years, although some models may only function well for 10 years. As your central AC unit nears the end of its lifespan, you might notice decreased cooling efficiency, strange noises and more frequent repairs.

Furnace

Furnaces last about the same as central AC units, with an average lifespan of 15 to 20 years (depending on the fuel source). Toward the end of their service, furnaces might exhibit ignition problems, struggle to maintain consistent temperatures or have pilot light issues.

Heat Pump

Heat pumps offer heating and cooling functionality, and their lifespan can vary from 10 to 20 years (although they can last an additional 10 years with proper care). Signs a heat pump is nearing retirement include reduced heating and cooling capacity, unusual noises and frequent defrost cycles.

Window AC Unit

Window AC units are known for their affordability and ease of installation, but their lifespans are shorter than most AC units, typically lasting between eight and 10 years. Reduced cooling power and excessive noise are telltale signs a unit is nearing its end.

Portable AC Unit

Similar to window AC units, portable units are known for their convenience. Depending on the model you choose, you can get up to 10 years of service from these handy appliances. Decreased cooling capacity and malfunctions with the electrical components are signs it might be time for a replacement.

Boiler and Radiators

With proper maintenance, boilers can be quite durable, lasting 20 to 30 years (depending on the type). Watch out for leaks, unusual boiler noises and radiators that struggle to heat rooms efficiently.

Ductwork

The material used for ductwork determines its lifespan. If yours is made from flexible aluminum, expect to get up to 20 years. If it’s galvanized steel, you can get up to 25 years of service. Warning signs include increased dust circulation, rooms that are difficult to heat or cool evenly and strange rattling noises.

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Regular Maintenance Is Key to Extending Your HVAC System’s Lifespan

Think of regular maintenance as preventive health care for your HVAC system. Scheduling annual maintenance with an HVAC professional can significantly extend your unit’s life. During a maintenance visit, the technician inspects, cleans and tunes up your system, identifying and resolving minor issues before they become major problems.

The benefits of regular maintenance include:

• Less wear and tear
• Improved efficiency
• Catching minor problems early
• Extension of the unit's lifespan

When Is It Time to Replace Your HVAC System?

Even with the best care, all machines eventually reach the end of their usable life. Here are some signs that might indicate it's time to replace your HVAC system:

• Frequent repairs: If your system requires repairs constantly, the cost of those repairs might outweigh the benefit of holding on to an aging unit.
• Rising energy bills: An inefficient HVAC system works harder to maintain your desired temperature, leading to increased energy consumption and higher utility bills.
• Reduced comfort: If your system struggles to keep your home comfortable, it might be time for an upgrade to a more efficient model.
• Your system’s age: As a general rule, if your HVAC system is over 15 to 20 years old, you should begin thinking about a replacement, especially if you're experiencing any of the previously mentioned issues.