Air purifier filter · Blueair
Blueair F4MAX Particle + Carbon filter (Blue Pure 411i Max / 411a Max)
- Replace every 6 months
- Fits inside the fridge
- Fits 2 models
The standard main filter for the Blue Pure 411i Max and 411a Max: 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 411i Max (3250i), Blue Pure 411a Max
- Lasts
- 6–9 months, tracked by the app (RealTrack)
Every number this part goes by
- Retail name:
- 110036
- Retail name:
- 3250i filter
- Retail name:
- 411i Max filter
- Retail name:
- F4 Max
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 (6–9 months on RealTrack (app tracks actual use)) — the app reminds you.
After fitting: Hold the button on the top of the purifier until the filter light goes out, or clear it in the Blueair app.
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.
- 2Hold the base, twist the top section a little anti-clockwise and lift it off.
- 3Lift the old cylindrical filter out of the base and drop the new one in, pull tab up. Take the plastic wrap off first.
- 4Refit the top, plug in, and hold the button until the filter light goes out (or reset it in the Blueair app).
Will it fit your appliance?
Type your model number and we'll check it against our fitment database.
Fits these models
Blueair2 models
Common questions
- Which filter fits the Blueair F4MAX?
- The Blueair F4MAX takes the Blueair F4MAX Particle + Carbon filter (Blue Pure 411i Max / 411a Max) (part F4MAX). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Blueair F4MAX?
- 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 F4MAX in Australia?
- We track 1 Australian seller for the F4MAX; the lowest listed price when we last checked was A$29.99 at blueair-au. Prices are re-checked daily and dated on this page.
- How do I fit the F4MAX in a Blueair F4MAX?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
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