Blueair 500/600 Series HEPASilent Particle Filter
Compatible with these Blueair purifiers: 501, 501B, 503, 550E (any model number beginning with a 5). 601, 603, 650E (any model number beginning with a 6)
Patented HEPASilent filter technology generally provides higher filtration performance than other air purifiers, trapping up to six times more dirt. Fine polypropylene fibers effectively capture 99.97% of airborne particles. The Blueair 3-stage progressive filter effectively removes every type of particulate air pollutant,, including allergens, pollen, mold spores, dust, pet dander, bacteria, and viruses.