Beyond 12 years, the 50% cost threshold signals when replacement outpaces repair economics

https://precisionhireprosac.image-perth.org/identifying-which-parts-fail-between-12-and-17-years-determines-repair-versus-replacement

The ideal age to replace an HVAC system hinges on documented cost-ratio data: once repair expenses exceed 50% of replacement cost in a single season, replacement becomes the data-backed threshold