|The Blueair 401 and 403 air purifiers feature patented HEPASilent filtration technology. HEPASilent filters work with electrostatic filtration to eliminate 99.97% of all particles 0.1 microns or larger. Replace your HEPASilent 400 filter every six months to maximize performance.
All Blueair HEPASilent filters eliminate particulate matter and allergens such as mold spores, pet dander, dust mite allergen, pollen, as well as some odors and gases.
For Blueair models: 402, 403, 450E