BLUEAIR Classic 500/600 Series Genuine Dual Protection Replacement Filter; fits Classic 580i, 680i, 501, 503, 505, 510, 550E, 555EB, 601, 605

Pricey but great quality. Keeps the Classic Blueair working like a charm.

Fit perfectly! No issues to date. Because of where we live, we only have to replace our filters every two years so these are worth the investment. I was surprised when I pulled out the old filters at all the dust they had accumulated. The air cleaner and filters work well.

Blue air, classic, dual protection filters really work. I live in a dusty prairie community, where summertime pollen and fire and wildfire smoke are a daily issue. These filters are our final level of defense after HEPA filtering all of the incoming air to our house as it circulates the, six month change interval works even under these conditions. Of note: I received very professional and thorough assistance from Amazon when an issue issue. Issue a rose. with shipping. I especially appreciate the help because these filters are sometimes hard to get and the substitute generic types do not seem as effective, especially with smoke. Thanks

The best one so far Clean the air very good.

This is a review of Amazon's inability to effectively sell a correctly package of the Blueair Classic 500/600 Series Genuine Dual Protection Filter. I had historically been purchasing elsewhere based the bad review experiences about incomplete orders; but in a regretful moment of trying to save a few dollars with subscribe and save I am sad to share I also experienced the same missing parts that so many other Reviewers who said Amazon was only shipping 1x of the filter pads even when the description clearly states: the 500/600 series air purifiers use 3 separate filters, this replacement pack contains a set of 3 filters. It boggles my mind that Amazon continues to make this mistake even after over 20 months of reviewers stating this. What's even more concerning to me would be how many buyers are unwittingly paying thrice the price for these filter pads. I reached out to Amazon and their standard offer for me was to return or replace. I opted to speak with customer service because I wanted to ask if a replacement would contain 3x or 1x pads. To their credit, Amazon couldn't answer my question and acknowledged it was their mistake. I asked couldn't they just mail me out 2 more pads and we call it fair and square. After the technician disappeared for a bit presumably discussing with a supervisor he returned and informed me Amazon will be promptly refunding my purchase and I could use, donate, or dispose of my one single pad. I'm glad to get a refund but still I encouraged Amazon to escalate this issue to a team to investigate why this item continues to be mispackaged. I got a standard line it would be escalated but I can't help still feeling skeptical. Why isn't Blueair taking a more vested interest in resolving this packaging issue with the largest retailer in the world? I reached out to Blueair though no answer yet. I ended up buying straight from Blueair which may be exactly what they want. But if I do get an answer I'll come back and update my review. In any case, take my word, and the word of so many other reviewers don't bother trying to buy this from Amazon until they address the packaging issue. By the way, for those of you interested in the product itself, the DualProtection pad is great and is a combination of the particle and the older carbon-based smokestop filter; Blueair's premium filter product. Its high quality, well-packaged and doesn't put off any odors at all. The pad fits perfectly and would be exactly what we needed if only it came as the pack of 3 as indicated.