The answer to 'what does air filter do' is that an air filter is a critical component in your home's HVAC system that helps clean the air by removing dust, pollen, and other airborne particles. Air filters work by trapping these contaminants before they can circulate through your ductwork and into the air you breathe. This helps improve indoor air quality and extends the lifespan of your HVAC equipment by preventing buildup of debris that can restrict airflow and reduce efficiency.
Air filters come in a variety of sizes, materials, and efficiency ratings to suit different HVAC system needs. Replacing your air filter regularly, typically every 1-3 months, is an important maintenance task that helps keep your home's air clean and your system running at its best.