Air filters are devices designed to remove particles and contaminants from the air. They are commonly used in heating, ventilation, and air conditioning systems, as well as in standalone air purifiers. By trapping dust, pollen, smoke, and other pollutants, air filters help improve indoor air quality and create a healthier living environment. There are various types of air filters, including HEPA filters, which can capture very small particles, and activated carbon filters, which are effective at removing odors and gases. Regular maintenance and replacement of air filters are essential to ensure they function effectively and maintain optimal air quality.