HEPA filters, or High-Efficiency Particulate Air filters, are designed to trap very small particles from the air. They can capture at least 99.97% of particles that are 0.3 microns in size, including dust, pollen, and pet dander. This makes them highly effective for improving indoor air quality, especially for people with allergies or respiratory issues. These filters are commonly used in various applications, such as vacuum cleaners, air purifiers, and HVAC systems. Regular maintenance and replacement of HEPA filters are essential to ensure they continue to function effectively and provide clean air in homes and workplaces.