Genuine Classic 400 Series Air Purifier Particle Replacement Filter | Authentic Classic 400 Filter, The Everyday Particle Filter for Classic 400 Series Only. HEPASilent Technology

great item. Have four in my house, nobody is stuffed up. works sooo well

I have had allergies for years, shots on two arms every spring. And after years of suffering, my brother told me about Bluair and I got it. This thing is short of miracle. The Bluair series is great. It filters air, odors etc. And from the time I have gotten the Bluair and the filter, I have had limited or no pollen issues. It sucks the air and filters air so well. The filter is by other comparative standards, on the expensive side, but it really lasts. And you can see how black it gets. One filter lasted more than 6 months plus longer. But for health, reducing my allergies, removing odors...can't beat it. I love this thing. It is by far the best investment I made. No complaints.

Have been using our Blueair 400 Series Air Filter for years. The unit and replacement filters are both very high quality. Used in the bedroom to facilitate clean air for better sleep. Change the element every 6 months. Between filter changes, every 3 months I take the unit and filter outside and use my air blaster to thoroughly clean the unit and the filter. For proper contact seal, must be very accurate with filter alignment when inserting the element. I recommend Blueair products.

Was happy to find this filter sold at Amazon. I have owned a Blueair 402 air purifier for over six years and it has been a great purchase. Even though the machine and filters are expensive, they are well worth the investment. I run my machine 24/7 during months when pollen is heavy. In the summer, I run it 24/7 to help keep my bedroom cool and it is wonderful to sleep in cool, CLEAN air. That's six years of constant use and have never had to do any repair...just replace the filter a couple of times year. I have recommended the Blueair 400 series to my friends and those who have purchased it have always thanked me as it works great for them too.

If you want a HEPA filter that actually works you need two things: Forced Air: - Cleaning the air in a room simply cannot be done with out exchanging significant volumes of air. The Model 402 air purifier this filter goes into can move some serious air and because of its size and design it can do so quietly. On the lowest setting it generates a nice gentle breeze with zero noise. On the highest setting the torrent of air it moves will have papers flying. If you own an iconic device find the nearest dumpster and throw it in. These devices are simply not capable of moving enough air and pollute your home with ozone. Particle Filtration down to .1 microns: - This filter can do that while on lower speed settings. Which is perfect cause the model 402 is too loud on the higher settings anyway. 99.97% of 0.1 micron particles are removed on Speed One. The replacement schedule for these is 6 months. Which means you go through about $100 in filters per device per year. That being said the effectiveness is so dramatic and the machine so versatile that the cost is justified. The filters come well packaged, and I have not had any problems ordering these from amazon.

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.

Blueair recommends changing the filters for their air purifiers every six months. The entire system is not inexpensive because the purifier is expensive and the replacement filters seem relatively expensive. However, the performance is valuable for anyone with allergies. By the time my filters are changed, there is noticeable build-up of particles so I know that this is something that we would be breathing in if not for the purifier. When I think about what our purifier does, running 24 hours a day, 7 days a week, for 365 days a year, I am appreciative for our cleaner air and decreases allergy reactions. The cost of the filter, changed twice a year, is approximately $0.45/day. For me, and my family, this is a good deal!

We have two cats and a nephew that is severely allergic to them. Bought this unit a couple of years ago to make the house bearable - when he would visit, within an hour his eyes would start watering, nose would get stuffy, and he was miserable. The first time we used the air cleaner we did so for one day in one of the main rooms and the next in another, and upon our nephew's next visit he was fine the whole day! Let me add that our house is very allergy friendly - there are no carpets, no drapes, both of which are great for holding in the stuff that people with allergies react to. This is a great unit and the filters, while expensive, are well worth it.

Good quality

純正品なので間違えなくスムーズに交換できました。

The Blueair filters are hospital grade filters that remove particulate down to about 1 micron. The filter with charcoal filters out unhealthy gasses. The Swedish designed Blueair Filter Units are excellent quality with noise levels below ambient bedtime levels (about 30 dbA)

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 oil Who sells someone something that’s already defective.

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.