The Airpura I600 Air Purifier uses an extra-large capacity HEPA filter in a pressure-sealed filter chamber to trap 99.97% of airborne particles, as small as 0.3 microns. Designed to deliver two air changes per hour in spaces as large as 2,000 square feet, it's a must-have for removing pollen, mold spores, dust, allergens, odors, and household chemicals. The I600 should be run at low to medium speeds to allow for adequate dwell time of dust particles on the HEPA filter. This will help remove all airborne dust particles from your air.