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Blueair air purifier

Blueair Classic 405 replacement filter

Blueair Classic 405 uses Classic 400 Series Particle Filter (part 402PF) as its primary replacement filter set.

Official Blueair fit · checked

Same filter, other models

Other Blueair purifiers that use Classic 400 Series Particle Filter 402PF

Own more than one purifier? These models share the same official part number.

All compatible Blueair Classic 405 filters

Primary filters are listed first. Specialty, optional, and alternative filters also fit, but you only need them if you want that feature.

Filter Part number Type Price
Classic 400 Series Particle Filter 402PF Standard replacement filter Check price
Classic 400 Series DualProtection Filter 402DPF Alternative DualProtection replacement filter Check price

Price links open sponsored eBay searches for the exact part number.

Before you order

How to buy the right Blueair Classic 405 filter

  • Confirm the label on your purifier reads Classic 405.
  • Make sure the listing names part 402PF, not just a similar-looking filter.
  • Check the pack size and pieces included. Genuine and third-party filters can differ.
  • Compare the total price with shipping, plus the seller's feedback and delivery estimate.

Care guidance

Replacement schedule

  • Classic 400 Series Particle Filter 402PF: Blueair recommends replacing the filter every 6 months under continuous operation.

Usage and air quality can affect service life. Follow the cited manufacturer guidance for each part.

Frequently asked questions

What filter does the Blueair Classic 405 use?

The Blueair Classic 405 uses Classic 400 Series Particle Filter (402PF) as its primary replacement filter parts. It also has these optional, specialty, or alternative compatible parts: Classic 400 Series DualProtection Filter (402DPF). Those parts are not simultaneously required primary filters.

How often should I replace the Blueair Classic 405 filter?

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

Where can I check replacement filters for the Blueair Classic 405?

This page links directly to the cited official Blueair product page and shows sponsored individual eBay listings when a fresh exact-part snapshot is available, with an exact-part eBay search fallback. This site does not sell filters; match the part number and review the current source or seller listing before buying.

Official compatibility record

Manufacturer evidence

Each compatibility and care statement below is reproduced from the cited official manufacturer record. Check the source again before ordering.

Classic 400 Series DualProtection Filter 402DPF

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

Source checked
Replacement guidance
Blueair recommends replacing the filter every 6 months under continuous operation.
Guidance checked

Classic 400 Series Particle Filter 402PF

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.

Source checked
Replacement guidance
Blueair recommends replacing the filter every 6 months under continuous operation.
Guidance checked

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