Blueair 400 Series Particle Filter Replacement, Single Unit, White

Stephen Russell: Very expensive. The filters work fine.

United States on Dec 16, 2023

Amazonのお客様A: 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。

Japan on Nov 26, 2023

jeff: Haven't used my BlueAir in a while. Have an older unit. Concerned about reviews talking about odor. Opened package and airing out just in case. Otherwise, looking forward to using my BlueAir 402 again.

United States on Nov 01, 2023

Maurice Poirier: Excellent, mais assez chère Merci

Canada on Oct 19, 2022

ow1: It appears the measurements of the filter are incorrect as listed. Possibly the box was measured instead of the filter itself

Canada on Mar 02, 2022

Amazon カスタマー: Like the Blue air device, gets rid of a lot of the contaminants.

Japan on Apr 23, 2021

H: 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.

United Kingdom on Feb 16, 2021

KathleenKathleen: 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...

United States on Oct 03, 2017

Marino Shauye: I get this replacement filter every 6 months for my Blueair 402 model. It has changed slightly over the years (I have owned the 402 for about 8 years already), but it is still the same great quality, and super easy to change out.

Open the side door, pull out the old filter, vacuum the inside of accumulated dust, slide the new filter in. Voila! Clean air for another 6 months!

It smells a little bit funny when you first insert a new filter, but just turn the cleaner on high and let it go for a couple of hours. The smell dissipates quickly.

As an allergy sufferer and multiple cat owner, the Blueair is a necessity for the bedroom. Silent, clean air.

United States on Feb 07, 2014

Mr. Reader: 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.

United States on Apr 18, 2013