Classic 500/600 Series HEPA Particle Filter Replacement Compatible with Blueair Air Purifier Models 501 503 505 510 550E 555EB 601 603 605 650E by LifeSupplyUSA (3-Pack)

Lot cheaper than the original. So far so good. Fits perfectly

great

These fit my air filter perfectly, and do a really good job of catching small particles from the air.

Always looking for a less expensive option for the Blue Air filters. Amazon keeps changing the vendors I have purchased from in the past. These are also half the price as OEM and seem to work just as well. Only complaint is that they don't have the little tab to make it easier when removing them from the filter well. Not a big deal.

Perfect fit. Got 3 filters for less than 1 OEM filter. Saved even more buying a box with mild cosmetic damage with no damage to the filters.

these are pretty good, i liked the pure burg ones better but i couldn’t find them this time still way better than paying out the yin yang for blueair brand tho

I was apprehensive because, like others said, these are cheaper than the blueAir filters, however, they fit PERFECTLY in our blueAir 600 unit and immediately helped. The part that faces out is black, so it blends perfectly with the grills. Nice snug fit, didn't affect any airflow or issues with our unit. Our low setting wasn't working before (probably from the icky and overdue for a replacement OEM filters) and now works perfectly fine! Fall (and Spring) in Texas really kick up the seasonal allergies around here and so far this is helping our purifier work and helping everyone breathe easier. I would definitely buy these again and recommend them to anyone!

I was really happy to find a less expensive filter for my Blueair 505. These appeared to be acti well made and look like factory duplicates. The finishing is just as good. I was so convinced that after I put them in I didn't check how the unit was functioning for the first week. One day I set the unit to high to feel the air coming out of the top and it was hard to feel any - it was imperceptible. However I could feel air rushing in a stream from the edges of the top panel. I removed the top screen to investigate and found that there was hardly any air passing through the filters it was going around them. Apparently the filters blocked so much air flow that the air found an easier path. Not exactly HEPA if the air isn't forced to go through the filters.

The first days it had a particular smell, but after it is gone. They are lightly sub-dimensional. The price is good. I recommend it but manufacturer should review dimensions.

Fitted perfectly my Blueair 600.

As much as this product did not work for me, the customer service was good and I was reimbursed.