Whenever we install a new heating/cooling system we are always asked the same question: “How long will it last?”. The simple answer: it depends on how well you maintain it. Every manufacturer makes their system slightly different than another and one part could last longer than another. For example, if a manufacturer produces systems that have poor quality compressors, then the overall life expectancy could drop significantly because compressors are sometimes more expensive to replace than the system itself.
Here is a chart which outlines the average life expectancy of HVAC systems based on how much maintenance you use, national averages, and plain old estimates. Please keep in mind that these are estimates, not guarantees. Your brand could result in higher or lower life expectancies.