BLUEAIRF400Pa - Hepasilent Particle Filter For Classic 400Series Compatible With Classic 402, 403, 405, 410, 450E, 455Eb, 480I - White."Min 1 year manufacturer warranty"

Sold me a filter that was already written down as defective, and returned by a previous buyer. They even wrote the dates when it was bought and returned.I tried it and the smell was horrible, like a car that was leaking gasoline and oilWho sells someone something that’s already defective.

Great filter, works perfect with my Blueair device.

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.

Good quality

I hate paying so much for a filter as we have 3 of these units BUT I think it’s worth it to buy the genuine model. I’ve tried a couple of different knock-off brands and I just don’t think they work as well as they seem to mess up the auto function. One of my units continuously kept going back and forth between settings 2 & 3 and the only way to stop this was to turn off auto. This has not happened with the Blueair filter. When changing the knock-offs they also don’t seem to be as dirty as the Blueair brand for some reason plus the Blueair seems to slide in and fit better and are easier to remove. I'm not a germophobe or fanatic but my air just seems fresher.These new ones I just purchased have different instructions on the sides. Instead of saying “This side must face back or front” there’s just a sticker with an arrow indicating AIR FLOW DIRECTION. I pulled this sticker back and sure enough it covered the original side placement instructions. I’m really not sure if this is really clearer as it was a little confusing to me. However, looks like the metal side goes facing the intake and the corrugated side faces the control side. Seems to be working great and I think I’ll stick with the Blueair from now on. Don’t be alarmed by the slight oil odor when you first install as it seems to dissipate very quickly.

５年位は使っています。ワンルームにブルーエアクラシックの40畳用のやつをぶん回しています。最近、センサーが効かなくなってサポートに出したら、5万くらいで新品の次機種に交換すると言われました。センサー交換だけなら２，３万です。今迷っていますが新品交換すると思います。スモーカーにとっては必需品です。

I wish this was more readily available but, when you can get hold of it, it is very easy to fit. Just remove the packaging and slot into place. My old filters were 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.