Replacement Filter Compatible with Blueair Blue Pure 411, Fits Blue Pure 411, 411 Auto, 411+ & MINI Air Purifiers, Particle and Activated Carbon

There's a lot of generic replacements listed, some on the super-cheap end of the spectrum. The cabiclean products are high-quality and good value, and strike a nice balance between avoiding the overpriced OEM versions and the cheapo knockoffs. Filters are not exactly the same, and you can see some minor work defects (like extra glue between the attaching pleats), but none that seem to affect quality.The real test is -- how "dirty" do they look after 3-6 months of filtration? And the answer there is pretty clear -- they are quite grey (at my house) and look like they've trapped just as much fine particulate as the OEM versions. So it seems to be just as good, but you should obviously try it out for yourself and make your own judgments!

They work great! Keeps the air clean! They fit perfect in the air filter.

What’s noticeable with these replacement filters is there appears to be greater number of pleats than original Blueair filters. The material is firmer and thinner on replacement filters. Not sure how that would affect filtration, if it degrades dust pickup, reduces life or creates back pressure for fan. The replacement filter fits onto frame a little looser than the original. Makes installation easier but it could permit some passage of unfiltered air. This loose fit is most apparent where filter folds are as shown in one photo. Will have to see how these replacement filters work out, haven’t used them yet. Price certainly is right, as long as they filter air adequately

This is a replacement filter for my air purifier. It was easy to switch out. Could definitely tell the old one needed replacement as it became much more sensitive when the new filter was on.

This is the brand filter: good, as advertised.Nothing to complain about, it's just as I expected.

Fits perfectly in my Blueair 411 Auto. Filter construction and materials look like a match to OEM. Same clean air smell and still no cat dander problems I used to have.

the replacement filter was a perfect match for the original filter at half the cost. well worth using this filter. seems to perform just as good as the OEM version

After 3 months, it was time to change the filter on my air purifier. Boy, did my Blue do it’s job well! I purchased these filters and they are superior replacements for my Blue 411. These filters actually seem thicker than the original supplied by the manufacturer and a bit more sturdy. Photo show’s replacement filter on left with 3 month old filter on right. The filter was a snap to install and has thus far, worked perfectly. Highly recommended.