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)

great

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.

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

I was a little hesitant to buy these since there was only one review at the time but I took the plunge. These are half the price of Blueair filters so they have to cut corners somewhere. First, the built-in handles (two finger holes) you get with Bluair are missing. Second, they are about 1/4 inch too short. You won't notice any difference on the sides but when you slide the top one in you'll notice it doesn't lock into place but has a bit of play. Once you put the lid on you won't be able to tell. So fo half price.....HECK YEAH!!!

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

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

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.