HVAC systems over 15 years old fail at double the repair rate of newer units

https://precision-hvac-repair-sac-apartment-sac-near-liahona-chapel3145.scriblorax.com/posts/keeping-your-12-15-year-coverage-protected-through-warranty-registration-and-maintenance

The frequency of HVAC servicing depends on your system's age and documented failure-rate metrics