Blueair® 405 Standard (Particle) Replacement Filter


Filters should be changed every 6 months with continuous use. This authentic Blueair filter replaces the particle-trapping filter that comes standard with the Blueair 400 Series air cleaners. Blueair filters use a combination of the best in electrostatic and mechanical filtration, to remove virtually all harmful particles from the air, with high air-flow efficiency and lower noise and energy consumption. Filters trap 99.97% of allergy causing particles down to 0.1 micron, including dust, pollen, bacteria, viruses, pet dander, mold spores.

Blueair’s HEPASilent™ filtration process captures 99.97% of airborne particles down to 0.1 micron in size. Airborne particles pass through a chamber of the Blueair air purifier to get electrically charged before passing through the gradient structure of the filters, causing the polluted particles to adhere effortlessly to the filter media. The filter resists clogging and won't re-release particles back into the air, even when the filter is heavily loaded. Blueair filter media is ultrasonically bonded to prevent filter fibers and other particles from escaping back into your environment, and is naturally antibacterial to prevent bacteria and mold growth. The filters are recyclable. Replace every 6 months.

  • Millions of ultra-thin fibers woven into progressively tighter layers trap progressively smaller particles.
  • Filters resist clogging without releasing captured particles, thus maintaining airflow and peak filtering performance.
  • Filters are water-resistant, naturally antibacterial, and non-toxic.  Thermally bonded media is free of chemical binders, and is environmentally friendly, breaking down into carbon dioxide and water.
  Particle Filter SmokeStop™ Filter
Removes up to 99.97% of all particles down to 0.1μm in size Yes Yes
Maximal removal of gases and odors No Yes1
Hydrophobic filter media that prohibits bacteria and mold growth Yes Yes
Low pressure drop2 Yes Yes
Allows maximum airflow Yes No3
Environmentally friendly4 Yes Yes