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Standard replacement filter set

Blueair Classic 500/600 Series Particle Filter 501PFK replacement filter

Classic 500/600 Series Particle Filter (part 501PFK) fits Blueair Classic 501, Blueair Classic 503, Blueair Classic 505 and 9 more models, according to the official Blueair product page.

Official Blueair fit · checked

Blueair models that use Classic 500/600 Series Particle Filter 501PFK

This filter is listed for 12 models. Open a model to see its complete list of primary, optional, and specialty filters.

Before you order

What to check in a 501PFK listing

  • The listing names part 501PFK. Similar-looking filters are not proof of fit.
  • Your purifier is one of the compatible models: Blueair Classic 501, Blueair Classic 503, Blueair Classic 505 and 9 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 set 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 500/600 Series Particle Filter (501PFK)?

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

Which Blueair models use the Classic 500/600 Series Particle Filter 501PFK?

According to the official Blueair product page, Classic 500/600 Series Particle Filter (501PFK) fits Blueair Classic 501, Blueair Classic 503, Blueair Classic 505 and 9 more models. Verify the model label on your unit before ordering.

Do aftermarket 501PFK filters work?

Marketplace listings may be from the manufacturer or a third party. Match the exact part number 501PFK, review the listing details, and verify the model label on your unit before buying.

Official compatibility record

Manufacturer source

Official Blueair documentation identifies Classic 500/600 Series Particle Filter set, SKU 501PFK, as compatible with Classic 501, Classic 503, Classic 505, Classic 510, Classic 550E, Classic 555EB, Classic 580i, Classic 601, Classic 603, Classic 605, Classic 650E, and Classic 680i.

Blueair Official Classic 500/600 Series Particle Filter

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