The answer to 'how does air filter work' is that an air filter is a device used to remove contaminants and impurities from the air. Air filters work by trapping particles such as dust, pollen, pet dander, and other airborne pollutants as air passes through the filter material. This helps to improve indoor air quality and protect HVAC equipment from damage.
Air filters come in a variety of materials and designs, including pleated filters, fiberglass filters, and high-efficiency particulate air (HEPA) filters. The filter material and construction determine the size of particles it can effectively capture. Replacing air filters regularly is important to maintain their effectiveness and ensure proper airflow in your HVAC system.