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Blueair Classic 203 Slim replacement filter

Blueair Classic 203 Slim uses Classic 200 Series Particle Filter (part 201PF) as its primary replacement filter set.

Quick fit check

Match the exact filter before buying

The official manufacturer source identifies these primary parts for the Blueair Classic 203 Slim.

Standard replacement filter Classic 200 Series Particle Filter 201PF
View part details Official Blueair source

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 200 Series DualProtection Filter 201DPF Alternative DualProtection replacement filter Blueair Official Classic 200 Series DualProtection Filter
Classic 200 Series Particle Filter 201PF Standard replacement filter Blueair Official Classic 200 Series Particle 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 200 Series DualProtection Filter 201DPF

Official Blueair documentation identifies Classic 200 Series DualProtection Filter, SKU 201DPF, as compatible with Classic 203, Classic 203 Slim, Classic 205, Classic 270E, Classic 270E Slim, and Classic 280i.

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

Classic 200 Series Particle Filter 201PF

Official Blueair documentation identifies Classic 200 Series Particle Filter, SKU 201PF, as compatible with Classic 203, Classic 203 Slim, Classic 205, Classic 270E, Classic 270E Slim, and Classic 280i.

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

Buying checklist

How to choose the right replacement

Match the Blueair Classic 203 Slim 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 200 Series Particle Filter 201PF: 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.

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Frequently asked questions

What filter does the Blueair Classic 203 Slim use?

The Blueair Classic 203 Slim uses Classic 200 Series Particle Filter (201PF) as its primary replacement filter parts. It also has these optional, specialty, or alternative compatible parts: Classic 200 Series DualProtection Filter (201DPF). Those parts are not simultaneously required primary filters.

How often should I replace the Blueair Classic 203 Slim filter?

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

Where can I check replacement filters for the Blueair Classic 203 Slim?

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.