Air filters are devices designed to remove particles and contaminants from the air. They work by trapping dust, pollen, smoke, and other pollutants, improving indoor air quality. Commonly used in homes, offices, and vehicles, air filters can be found in heating, ventilation, and air conditioning HVAC systems, as well as in portable air purifiers. There are various types of air filters, including HEPA filters, which are highly effective at capturing small particles, and activated carbon filters, which help eliminate odors. Regular maintenance and replacement of air filters are essential to ensure they function effectively and provide clean air for breathing.