Air purifier filter
Blueair Particle + Carbon filter (Blue Pure 121)
F121PACF104507
Fits 1 model · replace every 6 months
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GenuineGenuine Blueair
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Sold by Blueair and retailersSold by Blueair and retailers
CompatibleCompatible option
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No compatible seller tracked yetNo compatible seller tracked yet
Genuine: made by Blueair. Compatible: another brand. Check certification on the seller's page.Genuine is made by Blueair. Compatible is made by another brand. Check the seller's certification details before choosing.
Sellers
AUD, before delivery. Each price shows when it was checked.
No Australian seller lists this part right now. Blueair has taken it off its Australian store (2026-09-28) and no Australian seller was found. Search the part code F121PACF104507 at your usual retailer.
How long it lasts
Usually every 6 months. The filter light is a reminder, not a water-quality sensor.
After replacing: Press and hold the button until the filter light goes out (about 5 seconds).
Flow slows and taste drops off as the filter fills up. Changing on time is the whole point.
Not due yet?
Get a nudge when your filter is due — it's every 6 months. One email two weeks before, no newsletter. Manage or stop it anytime.
How to change the F121PACF104507 filter
Watch the guide or follow the steps.
- 1Switch the purifier off and unplug it.
- 2Lift the top section straight up off the base.
- 3Lift the old cylindrical filter out, unwrap the new one and drop it in.
- 4Refit the top, plug in, and hold the button until the filter light goes out.
Every number this part goes by
- Retail name:
- 104507
- Retail name:
- 121 filter
- Retail name:
- F121PACF104507
Sellers list any of these; they are the same part.
Will it fit your appliance?
Type your model number and we'll check it against the makers' lists.
Fits these 1 Blueair model
Blueair1 model
Common questions
- Which filter fits the Blueair F121PACF104507?
- The Blueair F121PACF104507 takes the Blueair Particle + Carbon filter (Blue Pure 121) (part F121PACF104507). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Blueair F121PACF104507?
- Every 6 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.
- How do I fit the F121PACF104507 in a Blueair F121PACF104507?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
- What happens if I don't change it?
- The fan works harder for less airflow, and the carbon layer stops taking smells out well before the filter looks dirty.
- How do I reset the filter light?
- Press and hold the button until the filter light goes out (about 5 seconds).
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