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

Blueair 121 Particle + Carbon Filter (F121PACF104507)

Blue Pure 121 Particle + Carbon Filter. Part F121PACF104507. Replacement indicator lights after about 6 months of operation. Fits 1 model.

Buy 121 Particle + Carbon Filter on AmazonManufacturer page

Opens an Amazon search for Blueair 121 Particle + Carbon Filter F121PACF104507. Check the listing says F121PACF104507.

Fits these models

Part numbers

Genuine part
F121PACF104507
How often
Replacement indicator lights after about 6 months of operation
What is in it
main filter media (dust, pollen, pet dander); activated carbon (light household odors)

Sources

  • Which filter fits blueair.com Maker's own page checked Oct 1, 2026
    Compatible with Blue Pure 121 ... This filter is compatible with the Blue Pure 121 air purifier.
  • How often blueair.com Maker's own page checked Oct 1, 2026
    A red filter replacement indicator appears on the air purifier when it is time to change filter, after about 6 months of operation.
  • 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
  • Other genuine options blueair.com Maker's own page checked Oct 1, 2026
    Blue Pure 121 Filter Extra Protection Compatible with Blue Pure 121 ... features highly-porous, activated carbon pellets for extra protection against harmful gaseous pollutants
Show all 5 sources

Which filter fits

  1. blueair.com Maker's own page checked Oct 1, 2026
    Compatible with Blue Pure 121 ... This filter is compatible with the Blue Pure 121 air purifier.
  2. blueair.com Maker's own page checked Oct 1, 2026
    Blue Pure 121 Particle + Carbon Filter, sku F121PACF104507

How often

  1. blueair.com Maker's own page checked Oct 1, 2026
    A red filter replacement indicator appears on the air purifier when it is time to change filter, after about 6 months of operation.

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

Other genuine options

  1. blueair.com Maker's own page checked Oct 1, 2026
    Blue Pure 121 Filter Extra Protection Compatible with Blue Pure 121 ... features highly-porous, activated carbon pellets for extra protection against harmful gaseous pollutants