Air purifier filter · Blueair
Blueair Classic 400 series DualProtection filter
- Replace every 6 months
- Fits inside the fridge
- Fits 3 models
The DualProtection (particle + carbon) filter for Blueair Classic 400 series purifiers. An alternative to the plain particle filter for the same slot.
Reduces
- Fine dust, pollen and allergens
- Odours, smoke and gases (activated carbon)
- Fits
- Classic 400 series
- Alternative to
- 402PF particle filter
Every number this part goes by
- Retail name:
- 103769
- Retail name:
- 402 DPF
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.
- 2Grip the edges of the front grille and pull it straight off (it is held by magnets). On 400/500/600 units do the same at the back.
- 3Slide the old flat filter(s) out and slide the new ones in the same way round, pleats facing out.
- 4Push the grilles back on, plug in, and hold the button until the filter light goes out.
Will it fit your appliance?
Type your model number and we'll check it against our fitment database.
Fits these models
Blueair3 models
Alternative to 402PF in the same slot.
Common questions
- Which filter fits the Blueair 402DPF?
- The Blueair 402DPF takes the Blueair Classic 400 series DualProtection filter (part 402DPF). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Blueair 402DPF?
- 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 402DPF in Australia?
- We track 1 Australian seller for the 402DPF; the lowest listed price when we last checked was A$129.99 at blueair-au. Prices are re-checked daily and dated on this page.
- How do I fit the 402DPF in a Blueair 402DPF?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
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