The average lifespan of ducts is between 20 to 25 years, but they start to show signs of wear and tear after 15 years. This can significantly reduce the efficiency of your air conditioning system, so it is recommended to replace them every 15 years or so. Duct materials can become worn out over time, which can have a major impact on the performance of your air conditioning system and the quality of air inside your home. It is best to replace your ducts after 20 years or sooner if you notice any signs of deterioration.
Doing so will help you save money on repairs and replacements, and ensure that you get the most out of your air conditioning system.