Within proper refrigerant handling procedures lies the key to extending system longevity by 15 to 20 years
https://telegra.ph/Across-HVAC-maintenance-schedules-same-day-dispatch-eliminates-waiting-for-urgent-seasonal-service-needs-08-10
Most furnaces last 15 to 20 years, but their actual lifespan hinges on how well refrigerant is handled during maintenance and repair