The Blueair 400 series air purifiers feature patented HEPASilent filtration technology to remove household allergens and irritants. HEPASilent filters work together 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. 1 Replacement Blueair 400 series HEPASilent particle filter F400PA
Reviewed by: g. norris...allergies since birth from Marietta, Georgia
I have used the Blueair purifier and filters for 6 years now and have added two more to the original....all of my filter products come from Achoo....ah, sweet, clean air and relief...
Blueair 400 series filter
Reviewed by: Susan from New Hampshire
We have two of these machines in our offices and they work great. The filters are changed every 6 months. I suffered with severe asthma due to building conditions and this filter has made a major difference in my breathing in the office. Very quiet too. Worth every penny.
Reviewed by: Bill , allergy sufferer from Ohio
Use this filter for my Blue Air Purifier in our bedroom to keep air fresh and clean free of allergens.
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