Efficiency Assessment Reveals Operating Cost Projections Across 15 to 20 Year Lifecycles
https://precisioninsurancesaccounty.bearsfanteamshop.com/lower-energy-bills-emerge-from-steady-operation-once-efficiency-ratings-fall-below-seer-13
Most HVAC systems in Sacramento last between 15 to 20 years, but actual lifespan depends on efficiency degradation and repair patterns