Running an HVAC System Past 30 Years Multiplies Failure Risk and Replacement Cost Exposure
https://precision-bonded-hvac.iamarrows.com/sudden-loss-of-cooling-or-heating-costs-between-four-and-twelve-thousand-dollars-for-replacement
Yes, an HVAC system can technically last 30 years, but running it beyond manufacturer design life creates severe failure risk and efficiency-loss liability