Blue Pure 121 Relacement Filter, Compatible with Blueair Blue Pure 121 Air Purifier, Particle and Activated Carbon Filter Captures Bacteria, Odors, Smoke, Dust

Saw this option and decided to roll the dice since it costs substantially less than the manufacturer's version. Plus, the company who manufactures this version has good ratings for all their other filters, so I thought it was worth a shot. Seems to be working well and fit in the unit perfectly. Solid product and a good price!

This looks identical to the original. and fits perfectly.

We really like these filters. Cheaper than buying from manufacturers.

We have used this product with each replacement. We're satisfied with its performance.

This filter fits my Blue air machine perfectly and seems to be really well made. I couldn’t see any difference between the original filter and this replacement as far as the build quality. I’m hoping it will work as well. Time will tell.

The item arrived on time as scheduled. This is the 2nd time I have ordered this item and have no complaints

For a blue aire 121 replacement.Works fine now , will see if it lasts as long

I've been using these charcoal filters for my tall Blue Air 121 unit for 3 years and I'm telling you there is no difference at all between the build and effectiveness of them when compared against the ridiculously expensive Blue Air replacement filters. Smoke, pollen, allergic things are captured just as effectively as the Blue Air filters I used to buy and when it is time to replace them, they come out of the unit just as dirty as the Blue Air filters. Today is Black Friday, and the first thing I do is purchase two of these to last me thru next year and I save about $100!