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

https://sacramentoprecisionhvac-local-sac-near-mcdonald-hearing-aid2826.readspirex.com/posts/cascade-damage-spreads-through-neglected-filter-changes-costing-thousands-in-repairs

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