When it comes to the life expectancy of a flex duct, industry articles, blogs, and chat rooms indicate that it can last anywhere from 10 to 25 years. Most flexible duct manufacturers guarantee their products for around 10 years, while residential ductwork can last anywhere from 25 to 70 years, with an average of 45 years. The difference in lifespan is due to the variables of materials, workmanship, and maintenance. Flexible ducts tend to have a shorter lifespan than hard ducts, and they can sink over time and restrict airflow if not properly suspended. Generally speaking, the life expectancy of a flex duct is estimated to be between 10 and 15 years.
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