Fits checked Oct 1, 2026 · How we check
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Blueair · air purifier

Blueair Blue Pure 311i+ Max replacement filter

Use part F3MAX+. Lasts up to 9 months depending on usage.

The filter that fits

Maker lists this model

Blueair 311i+ Max Particle + Carbon Filter

Blue Pure 311i+ Max Particle + Carbon Filter

Part number
F3MAX+also sold as 110038
How many
1 per unit
How often
Lasts up to 9 months depending on usage

Blueair does not state how many of these filters the unit holds; the count of one shown here is not stated by the maker.

Buy 311i+ Max Particle + Carbon Filter on AmazonManufacturer page

Opens an Amazon search for Blueair 311i+ Max Particle + Carbon Filter F3MAX+. Check the listing says F3MAX+.

See the sources

Does your exact model share this filter?

Blueair labels several versions of the Blue Pure 311i+ Max. Check the label on your unit.

  • Blue Pure 311i+ Max takes F3MAX+
  • Blue Pure 311i Max different filter · Takes F3MAX (110037).

Look-alike models that take a different filter

The 311i Max (no plus) takes F3MAX (110037); the plus changes the filter.

Other genuine options from Blueair

Variants and kits the maker sells for this model. Same fit, different media or packaging.

Sources

High confidence: the manufacturer names this exact model on a live page. Each line is the page we read and the day we read it.

  • Which filter fits blueair.com Maker's own page checked Oct 1, 2026
    Compatible with Blue Pure 311i+ Max ... This filter is compatible only with the Blue Pure Max 311i+ air purifier.
  • How often blueair.com Maker's own page checked Oct 1, 2026
    Depending on usage, your filter will last up to 9 months.
  • What's in it blueair.com Maker's own page checked Oct 1, 2026
    Main filter captures dust mite matter allergen & pet dander allergen ... Activated Carbon Traps light household odors from smoke, cooking odors and more
Show all 4 sources

Which filter fits

  1. blueair.com Maker's own page checked Oct 1, 2026
    Compatible with Blue Pure 311i+ Max ... This filter is compatible only with the Blue Pure Max 311i+ air purifier.
  2. blueair.com Maker's own page checked Oct 1, 2026
    Blue Pure 311i+ Max Particle + Carbon Filter, sku 110038: "F3MAX+ replacement PAC filter for 311i+ Max (3450i)"

How often

  1. blueair.com Maker's own page checked Oct 1, 2026
    Depending on usage, your filter will last up to 9 months.

What's in it

  1. blueair.com Maker's own page checked Oct 1, 2026
    Main filter captures dust mite matter allergen & pet dander allergen ... Activated Carbon Traps light household odors from smoke, cooking odors and more