Overall, without maintenance, the average HVAC system will have a life expectancy of about 15 years. With routine maintenance, HVAC systems can last up to an additional 10 years. Remember that while the average lifespan of HVAC systems ranges from 10 to 25 years, depending on your climate and the type of heating and cooling system you have. However, your HVAC system may last less time than that if it has been overworked due to insufficient insulation and unwanted airflow (due to unsealed air leaks).
Learn how to find air leaks in your home. In the United States, the average lifespan of an HVAC system is 14 years. Of course, systems can last much longer or disappear much sooner for a variety of reasons. Most utility companies will offer HVAC rebates when you're ready to upgrade your HVAC system to an energy efficient model.
Even if ahead of schedule, HVAC filters should be replaced if they are heavily soiled, both for the sake of your HVAC system and for your own. HVAC technology has come a long way, and your home's energy efficiency is affected only by holding on to older HVAC technology, so it's time to think about a replacement, yes, even if it “continues to work well”. What most homeowners don't know is that, even with a newer, more energy efficient HVAC system, if your home isn't properly insulated or sealed by a professional, it automatically shortens the life of your HVAC system. A dirty air filter forces the HVAC system to work harder to move air around the house, increasing wear and tear.
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