Blueair Blue Pure 121 filter
The Blueair Blue Pure 121 takes the Blueair Particle + Carbon filter (Blue Pure 121) (part F121PACF104507) as its filter; replace it every 6 months; Australian sellers list it from A$94.99 as of 1 August 2026. Fitment confirmed against the manufacturer's compatibility list.
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Your air purifier
Blueair Blue Pure 121
Air purifier · Blue Pure
Takes this filter
Particle + Carbon filter (Blue Pure 121)
F121PACF104507
The right filter for Blue Pure 121
Blueair Particle + Carbon filter (Blue Pure 121)
- Replace every 6 months
- Fits inside the fridge
- Fits 1 model
The standard main filter for the Blue Pure 121: a pleated particle filter with an activated-carbon layer in one drop-in cylinder. Blueair's AllergenBlock and SmokeBlock filters fit the same slot if you want an allergy- or smoke-focused alternative.
Reduces
- Fine dust, pollen and allergens
- Odours, smoke and gases (activated carbon)
- Fits
- Blue Pure 121
- Lasts
- 6 months (filter light)
Every number this part goes by
- Retail name:
- 104507
- Retail name:
- 121 filter
Where to buy
Every seller we track for this part, cheapest first. Genuine is the manufacturer's own part; compatible is a third-party filter made to fit. Prices are re-checked daily where the seller publishes them. Last checked 1 August 2026.
How long it lasts
Replace every 6 months — the appliance's filter light tells you when.
After fitting: 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 of the filter.
Not due yet?
This filter is due every 6 months. We'll email you when it's time — free, no spam.
Fitting it
A few minutes, no tools. Watch it done, then 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.
About your Blueair Blue Pure 121
Blueair air purifier, air purifier — Blue Pure. Its filter is the Particle + Carbon filter (Blue Pure 121), part F121PACF104507, changed every 6 months.
Also in this air purifier: Blueair Extra Protection Particle + Carbon filter (Blue Pure 121) (every 6 months), Blueair fabric pre-filter (Blue Pure 121) (every 12 months). Worth replacing together — one job, not two.
Checking the model number: The model number is on the rating label on the bottom or back of the purifier; the old filter usually has its own code printed on the frame.
Fits these models
Blueair1 model
Common questions
- Which filter fits the Blueair Blue Pure 121?
- The Blueair Blue Pure 121 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 Blue Pure 121?
- Every 6 months. Flow slows and performance drops off as the filter fills up, so it's worth doing on time.
- Where can I buy the F121PACF104507 in Australia?
- We track 1 Australian seller for the F121PACF104507; the lowest listed price when we last checked was A$94.99 at blueair-au. Prices are re-checked daily and dated on this page.
- How do I fit the F121PACF104507 in a Blueair Blue Pure 121?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
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