Manual J Calculations Add 10 Years to Unit Lifespan Through Accurate Sizing
https://precision-insurance-approved.theglensecret.com/most-hvac-systems-reach-30-years-through-planned-repair-investment-and-diagnostic-pricing
An HVAC system typically lasts 15 to 20 years, but correct Manual J load calculation and proper tonnage sizing can add a full decade to that lifespan