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Standard replacement filter

Blueair Classic 400 Series Particle Filter 402PF replacement filter

Classic 400 Series Particle Filter (part 402PF) fits Blueair Classic 402, Blueair Classic 403, Blueair Classic 405 and 4 more models, according to the official Blueair product page.

Official Blueair fit · checked

Blueair models that use Classic 400 Series Particle Filter 402PF

This filter is listed for 7 models. Open a model to see its complete list of primary, optional, and specialty filters.

Before you order

What to check in a 402PF listing

  • The listing names part 402PF. Similar-looking filters are not proof of fit.
  • Your purifier is one of the compatible models: Blueair Classic 402, Blueair Classic 403, Blueair Classic 405 and 4 more models.
  • The pack size and pieces included match what you need. Genuine and third-party filters can differ.
  • The total price with shipping, seller feedback, and delivery estimate work for you.

Care guidance

Replacement schedule

Blueair recommends replacing the filter every 6 months under continuous operation.

Usage conditions can affect service life. Follow the cited manufacturer guidance for this part.

Compare compatible options

These share at least one compatible model but may do a different job, such as a carbon pre-filter or a specialty version. Check each part page before buying.

Frequently asked questions

How often should I replace the Blueair Classic 400 Series Particle Filter (402PF)?

Blueair recommends replacing the filter every 6 months under continuous operation.

Which Blueair models use the Classic 400 Series Particle Filter 402PF?

According to the official Blueair product page, Classic 400 Series Particle Filter (402PF) fits Blueair Classic 402, Blueair Classic 403, Blueair Classic 405 and 4 more models. Verify the model label on your unit before ordering.

Do aftermarket 402PF filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number 402PF, review the listing details, and verify the model label on your unit before buying.

Official compatibility record

Manufacturer source

Official Blueair documentation identifies Classic 400 Series Particle Filter, SKU 402PF, as compatible with Classic 402, Classic 403, Classic 405, Classic 410, Classic 450E, Classic 455EB, and Classic 480i.

Blueair Official Classic 400 Series Particle Filter

Source compatibility checked 2026-08-29. Recheck the listing and your purifier label before ordering.