What is the primary purpose of an HVAC air filter?

An HVAC air filter primarily serves to remove pollutants from the air circulating through the system. By capturing dust, pollen, pet dander, mold spores, and other airborne particles, the filter helps to improve indoor air quality. This purification process is crucial not only for the comfort of occupants but also for the health of individuals sensitive to allergens and irritants.

Furthermore, a clean air filter plays a significant role in the efficiency and lifespan of the HVAC system itself. By preventing dirt and debris from entering the system, filters help maintain optimal airflow, thereby allowing the unit to operate effectively and reducing energy consumption.

While other answers refer to processes related to HVAC systems, they do not capture the primary function of air filters. For instance, regulating temperature is the main role of heating and cooling components, increasing airflow is a byproduct of maintaining clean filters, and moisture absorption is handled by dehumidifiers rather than air filters.