The answer to 'how long does ductwork last' is that properly installed and maintained ductwork can last 15-25 years on average. Ductwork is a critical component of an HVAC system, responsible for distributing heated or cooled air throughout a home. The lifespan of ductwork can vary depending on factors like the materials used, installation quality, and how well it's maintained over time.
Well-constructed metal ductwork made from galvanized steel or aluminum tends to have the longest lifespan, often lasting 20-25 years with proper care. Flexible ductwork made from plastic or foil materials generally has a shorter lifespan of 10-15 years. Proper insulation, sealing, and regular cleaning are important to maximize the longevity of any ductwork system.