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Blueair Classic 501 replacement filter

Blueair Classic 501 uses Classic 500/600 Series Particle Filter (part 501PFK) as its primary replacement filter set.

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Match the exact filter before buying

The official manufacturer source identifies these primary parts for the Blueair Classic 501.

Standard replacement filter set Classic 500/600 Series Particle Filter 501PFK
View part details Official Blueair source

Marketplace search

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A current exact-part listing snapshot is not available. Use the part-number searches below and verify the listing before ordering.

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All compatible part numbers

Primary, optional, specialty, and alternative filters are listed separately so you can match the role as well as the part number.

Filter Part number Role Source
Classic 500/600 Series Particle Filter 501PFK Standard replacement filter set Blueair Official Classic 500/600 Series Particle Filter
Classic 500/600 Series DualProtection Filter 103770 Alternative DualProtection replacement filter set Blueair Official Classic 500/600 Series DualProtection Filter

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 500/600 Series Particle Filter 501PFK

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.

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

Classic 500/600 Series DualProtection Filter 103770

Official Blueair documentation identifies Classic 500/600 Series DualProtection Filter set, SKU 103770 (501DPF), 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.

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

Buying checklist

How to choose the right replacement

Match the Blueair Classic 501 model label and the exact part number above. Marketplace listings can be OEM or aftermarket, and a similar-looking filter may have different dimensions.

Compare the listing title, product photos, included filter pieces, seller details, delivery estimate, and total price before you order.

Care guidance

Replacement schedule

  • Classic 500/600 Series Particle Filter 501PFK: Blueair recommends replacing the filter set every 6 months under continuous operation.

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

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Frequently asked questions

What filter does the Blueair Classic 501 use?

The Blueair Classic 501 uses Classic 500/600 Series Particle Filter (501PFK) as its primary replacement filter parts. It also has these optional, specialty, or alternative compatible parts: Classic 500/600 Series DualProtection Filter (103770). Those parts are not simultaneously required primary filters.

How often should I replace the Blueair Classic 501 filter?

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

Where can I check replacement filters for the Blueair Classic 501?

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.