HEPA filters, or High-Efficiency Particulate Air filters, are designed to trap tiny particles from the air, making them essential for clean indoor environments. 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 popular in air purifiers, vacuum cleaners, and HVAC systems to improve air quality. These filters work by forcing air through a dense mat of fibers, which act like a barrier to catch pollutants. Using HEPA filters can significantly reduce allergens and irritants in your home, benefiting those with allergies or respiratory issues, such as asthma.