The longevity of R6 ducting can vary, contingent upon elements such as the caliber of installation, upkeep, and environmental conditions. However, with proficient installation and routine maintenance, it is capable of enduring for numerous years, frequently mirroring the lifespan of the HVAC system itself. In general, ductwork persists for approximately 10 to 25 years, reliant on factors including maintenance, duct type, and the excellence of installation. The longevity of flex ducts, in particular, can fluctuate significantly; some have been known to endure for nearly 30 years, while others may only last for about a decade. The sole method to ascertain the condition and potential longevity of existing ductwork is through inspection.