The answer to 'how long does HVAC system last' is that a typical HVAC system has an average lifespan of 15-25 years, depending on the type of equipment and how well it is maintained. Proper installation, regular maintenance, and timely repairs can help extend the system's lifespan at the higher end of that range. Factors like climate, usage patterns, and the quality of the original installation also play a role in determining the system's longevity.
It's important to keep an eye on your HVAC system's performance and have it serviced by a professional technician at least once a year. This can help identify any issues early on and ensure the system is running efficiently, which can maximize its useful life.