402 Using patented 2-Stage HEPASilent™ technology, it captures 99. 1 micron particles on Speed One, including allergy-provoking pollen, dust mites, mold spores, and pet dander. BlueAir is the system for people with allergies, asthma, other respiratory conditions, or for anyone who wants cleaner, more breathable air.
This same filter technology earned the larger BlueAir units Best of Class ranking in independent AHAM testing of Clean Air Delivery Rates. The 402 provides comparable performance for mid-sized rooms. The 402 effectively purifies air in rooms as large as 365 sq. ft. 97% of the tiniest 0.