Air purifier filter · Blueair
Blueair Classic 500/600 series Particle filter set (3)
- Replace every 6 months
- Fits inside the fridge
- Fits 4 models
The set of three particle filters (with carbon sheet) for Blueair Classic 500 and 600 series purifiers (505, 605, 680i, 690i); the machine holds all three. Change every six months.
Reduces
- Fine dust, pollen and allergens
- Light odours (carbon sheet)
- Pack
- 3 filters
- Fits
- Classic 500 and 600 series
- Lasts
- 6 months
Every number this part goes by
- Retail name:
- 501 PFK
- Retail name:
- Classic 500 particle filter
- Retail name:
- Classic 600 particle 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.
- 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
Blueair4 models
Common questions
- Which filter fits the Blueair 501PFK?
- The Blueair 501PFK takes the Blueair Classic 500/600 series Particle filter set (3) (part 501PFK). Compatible filters made to the same specification also fit.
- How often should I replace the filter in my Blueair 501PFK?
- 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 501PFK in Australia?
- We track 1 Australian seller for the 501PFK; the lowest listed price when we last checked was A$99.99 at blueair-au. Prices are re-checked daily and dated on this page.
- How do I fit the 501PFK in a Blueair 501PFK?
- No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
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