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Okaysou · air purifier

Okaysou AirMax 8L replacement filter

Use part OS1109B1831A and OS1109B1831B. Replace every 6 months.

The filter that fits

From the maker's archived page

Okaysou AirMax 8L HEPA Ultra-Filter

Okaysou AirMax 8L 3-in-1 HEPA Ultra-Filter

Part number
OS1109B1831A
How many
1 per unit
How often
Replace every 6 months

Okaysou's own site no longer loads; this fit rests on an archived copy of its filter page.

Buy AirMax 8L HEPA Ultra-Filter on Amazon

Opens an Amazon search for Okaysou AirMax 8L HEPA Ultra-Filter OS1109B1831A. Check the listing says OS1109B1831A.

See the sources

Also fits

From the maker's archived page

Okaysou AirMax 8L Carbon Duo-Filter

Okaysou AirMax 8L 2-in-1 Carbon Duo-Filter

Part number
OS1109B1831B
How many
1 per unit
How often
Replace every 6 months

Okaysou's own site no longer loads; this fit rests on an archived copy of its filter page.

Buy AirMax 8L Carbon Duo-Filter on Amazon

Opens an Amazon search for Okaysou AirMax 8L Carbon Duo-Filter OS1109B1831B. Check the listing says OS1109B1831B.

See the sources

Look-alike models that take a different filter

The AirMax 10L, 10L Pro and 11L take different Okaysou filter sets.

Sources

Medium confidence: from an archived manufacturer page, a licensed brand store, or a live manufacturer page that names a sibling variant rather than this exact model. Each line is the page we read and the day we read it.

  • Which filter fits web.archive.org Maker's archived page checked Oct 1, 2026
    True HEPA Filter unique designed for Okaysou AirMax8L air purifier (snapshot 2021-10-19)
  • How many web.archive.org Maker's archived page checked Oct 1, 2026
    Page for the AirMax 8L (per its URL): the powerful Ultra HEPA Filter and Duo Carbon Filter, which work together (snapshot 2023-06-02)
  • How often web.archive.org Maker's archived page checked Oct 1, 2026
    it is recommended to replace the filter every 6 months
  • What's in it web.archive.org Maker's archived page checked Oct 1, 2026
    Combines with Pre-filter, HEPA filter, and Antimicrobial filter in 1
Show all 9 sources

Which filter fits

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    True HEPA Filter unique designed for Okaysou AirMax8L air purifier (snapshot 2021-10-19)
  2. web.archive.org Maker's archived page checked Oct 1, 2026
    genuine Okaysou Active Carbon & Cold Catalyst replacement filter to make your AirMax8L air purifier in its best working condition; variant 2-in-1 Carbon Duo-Filter, sku OS1109B1831B (snapshot 2023-10-02)
  3. web.archive.org Maker's archived page checked Oct 1, 2026
    Okaysou AirMax 8L HEPA Ultra-Filter ... sku OS1109B1831A
  4. web.archive.org Maker's archived page checked Oct 1, 2026
    variant 3-in-1 HEPA Ultra-Filter, sku OS1109B1831A, barcode 736900011074 (snapshot 2023-10-02)
  5. web.archive.org Maker's archived page checked Oct 1, 2026
    2-in-1 Carbon Duo-Filter, sku OS1109B1831B

How many

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    Page for the AirMax 8L (per its URL): the powerful Ultra HEPA Filter and Duo Carbon Filter, which work together (snapshot 2023-06-02)

How often

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    it is recommended to replace the filter every 6 months
  2. web.archive.org Maker's archived page checked Oct 1, 2026
    it is recommended replacing the filter every 6 months

What's in it

  1. web.archive.org Maker's archived page checked Oct 1, 2026
    Combines with Pre-filter, HEPA filter, and Antimicrobial filter in 1