All our HEPA products use HEPA 13 filters, rating as MERV 17 or higher. can trap 99.97% of air particles that are 0.3-1.0 micron in size. HEPA captures pollen, dirt, dust, moisture, bacteria (0.2-2.0 micron), virus (0.02-0.3 micron), and submicron liquid aerosol (0.02-0.5 µm).HEPA is also able to capture some viruses and bacteria which are ≤0.3µm. High-efficiency particulate air (HEPA) filter to enhance air cleaning wherever possible, especially in higher-risk areas such as a nurse’s office or sick/isolation room.