HVAC Lifespan, Maintenance, and When to Replace Your System
How long HVAC systems typically last, how often to service one, and how to decide between repairing and replacing.
What to Know
Most central air conditioners last 10 to 15 years, and furnaces typically last 15 to 20 years, according to industry lifespan data — though quality installation and regular maintenance can extend that range.
Annual maintenance matters more than most homeowners realize. A single yearly professional tune-up can meaningfully reduce the odds of an unexpected breakdown and helps the system run efficiently for its full expected lifespan.
A simple rule of thumb for repair-vs-replace decisions: multiply the repair estimate by the system's age in years. If that number exceeds roughly $5,000, replacement is usually the better financial choice.
Frequent repairs are a signal on their own. One repair in several years is normal wear and tear — three repairs in two years usually means the system is nearing the end of its useful life.
Rising energy bills without a rate change from your utility company often point to declining system efficiency, even before a full breakdown happens.
New system installation typically costs $3,000 to $7,500 for a standard central AC unit, depending on size, efficiency rating, and ductwork condition.
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