Blueair 400 series particle filter

Uncompromised particle removal
Advanced HEPASilent™ technology removes at least 99.97% of all airborne particles like PM 2.5, pollen, dust, pet dander, and mold spores down to 0.1 microns.

Particle filter
Removes airborne pollutants and allergens such as pollen, dust, pet dander, mold spores, fine smoke particles and more.


Traps particles for good
The gradient filter structure traps even the smallest particles and resists clogging to maintain maximum airflow.


100% recyclable
This filter is 100% recyclable, so the only thing you're adding back into the environment is clean air.


Naturally antibacterial
Filter fibers naturally prevent bacteria and mold growth, to ensure you'll never put bacteria and mold back into the air.


6-month filter life
To maintain optimum performance, we recommend changing your filter about once every 6-months when used 24 hours a day.


Manufacturer recommended
Genuine Blueair replacement filters guarantee the superior performance of your air purifier and ensure your warranty remains intact.