What is the primary function of air filters in a HVAC system?

The primary function of air filters in an HVAC system is to remove airborne particles and contaminants from the air. This includes dust, pollen, mold spores, pet dander, and other particulate matter that can negatively affect indoor air quality. By trapping these particles, air filters help to ensure that the air circulating through the HVAC system and into the living spaces is clean and healthy.

Moreover, the filtration process helps protect the internal components of the HVAC system from buildup that could affect its performance and longevity. Cleaner air also contributes to the comfort of occupants by reducing allergens and potential irritants. While other functions like maintaining temperature control, regulating humidity levels, and enhancing energy efficiency may indirectly be aided by the presence of a good air filter, their primary and most direct purpose is filtration. Thus, selecting the right filter is integral to the overall effectiveness of the HVAC system.