Yes, it does. Recently there has been a lot of publicity regarding the health risk associated with ultrafine particles, also known as PM 2.5. Ultrafine particles are particles smaller than 2.5 microns, but 90% of ultrafine particles are actually smaller than 0.1 microns. These particles are created by cars, trucks, refineries, manufacturing, and indoor cooking and are particularly worrisome because when they are inhaled, they are deposited deep into the lungs and may be absorbed into the blood. These particles are linked to serious illnesses like heart attacks, strokes, asthma, and cancer. Ordinary HEPA systems claim to remove particles down to 0.3 microns. AmazingAir's UltraHEPA has been independently tested to remove 100% of airborne particles at 0.003 microns in size, 100 times smaller than the HEPA standard.