Balanced airflow extends HVAC longevity beyond the typical 15 to 20 year window

https://blogfreely.net/lithilszxt/h1-b-underneath-every-25-year-old-hvac-unit-lies-the-need-for-professional

The lifespan of an HVAC system typically ranges from 15 to 20 years, but proper airflow balancing throughout its measurement sequence and calibration checkpoints can extend that window significantly