This air filter has been treated to be extremely porous, and this is the popular filtration against gases, chemicals and Volatile Organic Compounds (VOCs). However, the Activated Carbon air filter can’t remove fine particles like dust, dust mites, pet dander or pollen from the air. For that you need the HEPA filter. Typical particle sizes which can be removed by carbon filters range from 0.5 to 50 µm.