Measuring System Efficiency Determines Remaining Lifespan of Your 12-Year-Old HVAC Unit
https://precisionhvacnearuc-davis.yousher.com/r-410a-phase-out-changes-when-your-hvac-system-truly-needs-replacement
Most HVAC systems last between 15 and 20 years, but your system's actual lifespan depends on efficiency metrics you can measure today