What is the primary purpose of an air filter in an HVAC system?

The primary purpose of an air filter in an HVAC system is to trap dust and allergens. Air filters are specifically designed to capture particles from the air as it circulates through the HVAC system. This includes dust, pollen, pet dander, mold spores, and other airborne contaminants. By filtering out these particles, the air filter helps to maintain indoor air quality, ensuring that the air circulating within the space is cleaner and healthier for occupants. This is especially important for people with allergies or respiratory issues, as it reduces their exposure to irritants.

While regulating airflow, improving energy efficiency, and controlling temperature are important functions of an HVAC system, they are not the primary purpose of the air filter. The effectiveness of an air filter in trapping particles can also contribute to energy efficiency, as a clogged or dirty filter may restrict airflow, making the system work harder to maintain temperature. However, the core function remains focused on cleansing the air of harmful pollutants.