









🌬️ Breathe brilliance — because your air deserves the best.
The Blueair Classic 400 Series Particle Filter (F400PA) is a genuine replacement filter engineered for Blueair Classic 400/500 air purifiers. Utilizing advanced HEPASilent technology, it captures 99.97% of airborne particles as small as 0.1 microns, including allergens, viruses, and fine dust. Its antibacterial polypropylene fibers prevent microbial growth, ensuring cleaner air without recontamination. Designed for easy, tool-free replacement, this filter supports up to 6 months of continuous use at a whisper-quiet 35 dB noise level, making it an essential upgrade for maintaining optimal indoor air quality in any modern professional environment.








| ASIN | B000069A1Q |
| Best Sellers Rank | 284,276 in Home & Kitchen ( See Top 100 in Home & Kitchen ) 335 in Air Purifier Filters |
| Brand | BLUEAIR |
| Colour | White |
| Compatible Models | Air Purifiers |
| Customer Reviews | 4.6 4.6 out of 5 stars (4,051) |
| Date First Available | 7 Aug. 2012 |
| Item Weight | 500 g |
| Material | 100 Percent Recyclable, Anti-Bacterial, Polypropylene and amp; Polyethylene Fibers |
| Model Number | 400 PF |
| Noise Level | 35 Decibels |
| Product Dimensions | 10.16 x 25.4 x 53.34 cm; 500 g |
| Special Features | Gradient structure, ultrasonically bonded filter media, removes particles down to 0.1 micron |
A**R
Good filter
Been using Blueair for many years and was due to replace the filter. Ordered it on Amazon as it was quick and convenient.
K**.
Worth it
The best air purifier brand in the market. I have been using Blue Air Air cleaners for over 8 years. Eliminates dust, pollen or even food smell. Sneezing, hay fever and itchiness are gone as well, and my eyelid doesn't feel heavy. I am extremely tidy, but London's air quality is terrible. I would not recommend any other brand than Blue AIr. The filter is heavy on price but your lungs are worth more than that.
M**T
Expensive, but effective.
Expensive, but effective.
A**R
good filtration
I wish this was more readily available but, when you can get hold of it, it is very easy to fit. Just remove the plastic packaging from the exterior of the filter and slot into place. My old filter was filthy and had needed to be replaced for a while; the difference in air quality afterwards was marked. I only use genuine filters, at least at the moment, but may need to review that should the genuine article remain difficult to source.
M**N
Good oroduct
I was very cautious buying this from Amazon but turned out good experience !!!
G**Y
Good filter.
Bought for mycology. Works as it should.
C**4
Clean air and easy to install!
Easy to install.
M**R
Unpleasant smell
The filter has quite a strong oil-type smell which I think others have encountered. As it arrives sealed and boxed as normal I assume this is an issue with Blueair’s manufacturing process. I’ve never experienced this issue with previous replacement filters. Hopefully the smell fades quickly with use.
D**D
I have had a BlueAir filter machine for over ten years. This filter is a genuine replacement for my unit. It is a little pricey but worth the expense.
E**S
Good quality
黒**彰
期待どおりでした。ただ、このタイプ廃盤になったとのことで、在庫がなくなれば終了。
S**Y
Comme tous les consommables, le prix pour le filtre est assez élevé ... Mais ce sont des bons filtres et il faut les changer tous les 6 mois...
M**D
I can evaluate this Accessiores as it’s not fitting in my blueair 680i has different fillers
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