germguardian Guardian Technologies FLT41002PK FLT4100 HEPA Replacement Filter E for AC4100, AC4100CA AC4150BL, AC4150PCA, 2 pack, Black Air Purifier

I always need this replacement it works so well

Not much to say about this. It goes with the air purifier I am using and it fits perfectly and does the job! I was impressed at how much dust and crap it filters out of the air, and am very thankful for it as my workplace is the worst when it comes to dust. Great product. Will be buying more as long as my air purifier works!

Works great

My mom was a very heavy smoker and these filters made visiting her SO much more pleasant. In her small apartment, the smoke hung thick in the air and could really be overwhelming. After starting to use these filters, it was a completely different experience.

Love your product had it for years

The whole air purifier is great. As others have stated, it seems as if they have gone cheap on the carbon filter. You can buy a bunch of carbon filters from anyone, and just double up. After that, it is still a good price

It works fine super easy to install and I can tell the difference in the air with this new filter.

Great product. Used to replace filters on the air cleaner I bought that doesnt make there filters any more...) :

Used to be much better quality- the top and bottom of the filter used to have some foam padding for a snug tight fit. Now the fit doesnt seem air tight. Also the pre-filter is shedding black debris everywhere. Its so thin and poorly made. When you put your hand on it youre fingers are covered with black debris? Was it always like this?

Bought these to replace the ones that came with the units. They helped reduce the odor great after smoke smell from a near by wild fire. I’d buy again for sure.