Blueair Classic 400 Series DualProtection Filter (New)

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Blueair Classic 400 Series DualProtection™ Filter

(Replaces the Old Classic 400 Series Smokestop Filters)

Compatible with 403 • 405 • 450E • 402 • 410 • 455EB • 480i

Classic 400 Series DualProtection™ Optional Filter is designed to remove a larger range of impurities from your indoor air when installed inside the traditional Blueair Air Purifier. Each model has its own size filter so be sure to check your model number or contact us for verification.

Faster gas and odor removal
The DualProtection filter is designed with high-porosity coconut carbon which efficiently removes gaseous pollutants like PM 2.5, VOCs, traffic exhaust, smog, smoke, odors and airborne chemicals faster compared to other carbon filters, to prevent them from ever building up.

Particle Removal
Designed for Blueair HEPASilent™ technology, which removes 99.97% of particles down to 0.1 micron. Rapidly removes pollutants such as pollen, dust, pet dander, mold spores, viruses and bacteria.

Classic 400 Series DualProtection™ Filters Remove

  • Harmful Gaseous Pollutants
  • Tobacco Smoke
  • Carbon Monoxide
  • Ethylene Oxide
  • Ozone
  • VOC's (Volatile Organic Compounds
  • Household Paint Fumes
  • Chemical Off-Gasing
  • Dust, Pollen, Pet dander, Mold, etc


Fits the Following Current Models:

  • Blueair 403 Air Filter
  • Blueair 450E Digital Air Filter


Fits the Following Discontinued Models:

  • Blueair 401 Smokestop Air Cleaner
  • Blueair 402 Smokestop Air Cleaner
  • Blueair 403 Smokestop Air Cleaner
  • Blueair 470E Digital Smokestop Air Cleaner
  • Blueair 450E Digital Smokestop Air Cleaner
  • Blueair 401 Air Purifier
  • Blueair 402 Air Purifier


All filters designed to last 6 to 12 months with average use.

  • 20.5 x 9.8 x 3.7 in


The Blueair Swedish-designed Advanced Air Cleaner AND Air Purifier uses a 3-stage mechanical and electrostatic filter to capture 99.97% of particles down to .01 microns in size with an average CADR (Clean Air Delivery Rate) of 437.5 - 28% higher than the average air cleaner. The HEPASilent™ air filtration technology actually reduces levels of ozone in the air while maintaining low energy consumption.

Blueair Air Cleaners Remove:

  • Allergens
  • Pollen
  • Dust and Dust Mites
  • Mold Spores
  • Pet Dander
  • Bacteria and Viruses