Pipelines in most homes typically have a lifespan of 10 to 15 years. If the ducts are older than 15 years, it is recommended to replace them to prevent pests, voids, drafts, and ensure that all parts of your home remain comfortable. Central air units usually last 12 to 17 years with average use and good maintenance. The size of the unit does not affect the lifespan of the air conditioner, unless it is not the right size for your home.
On average, an air conditioning system can last between 10 and 25 years, depending on several factors. If you keep up with suggested maintenance, the average life expectancy of commercial HVAC systems is 15 to 20 years. However, just like your body needs exercise, proper nutrition, and enough sleep to stay healthy, your commercial air conditioning system will wear out more quickly if you don't perform necessary maintenance and repairs.