Measuring System Efficiency Determines Remaining Lifespan of Your 12-Year-Old HVAC Unit
https://precisionwarrantyhvac.fotosdefrases.com/correct-ac-sizing-determines-whether-your-20-year-old-unit-deserves-repair-investment
Most HVAC systems last between 15 and 20 years, but your system's actual lifespan depends on efficiency metrics you can measure today