Air purifier filter · Blueair
Blueair SmokeBlock filter (Blue Pure 411i Max / 411a Max)
- Replace every 6 months
- Fits inside the fridge
- Fits 2 models
Blueair's SmokeBlock filter for the Blue Pure 411i Max and 411a Max: a smoke-and-odour-focused alternative to the standard Particle + Carbon filter, fitting the same slot. Choose one main filter, not both.
Reduces
- Smoke and odours (extra carbon)
- Fine dust, pollen and allergens
- Fits
- Blue Pure 411i Max, Blue Pure 411a Max
- Alternative to
- F4MAX Particle + Carbon
Every number this part goes by
- Retail name:
- 411i Max SmokeBlock
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.
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.
We haven't found a clear video for this filter yet. The steps on the right cover it.
- 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
Alternative to F4MAX in the same slot.
Common questions
- Which filter fits the Blueair 111237?
- The Blueair 111237 takes the Blueair SmokeBlock filter (Blue Pure 411i Max / 411a Max) (part 111237). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Blueair 111237?
- 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 111237 in Australia?
- We track 1 Australian seller for the 111237; the lowest listed price when we last checked was A$39.99 at blueair-au. Prices are re-checked daily and dated on this page.
- How do I fit the 111237 in a Blueair 111237?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
Own a 111237 and this looks wrong? . Reports go to a person, not a bot.