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

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

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.

This filter assembly fit the air purifier perfect. Carbon filter is normal thickness. Product is as described

This is a HEPA-rated air filter for a unit I use in my bedroom at night to help me sleep. After about 6 months use I needed to replace my worn filter for a new one. This one fit the bill. I suppose it cleans and filters the air, the filter sure looks like its battle-worn. So pop in the new one and I suppose its doing its job and cleaning the air I breath. Dont know if it works against Covid or not but taking no chances. My inside air is going to be fresh and clean with two different air filters running, both HEPA, as well as my home a/c unit with HEPA filter.

Work well

I have such bad allergies. I love that my machine is about 4 yrs old and I can still easily find new filters here on Amazon!

Lucky that we have it.. The air quality is bad recently due to vacavile fire

While these are just filters, the machine from this manufacturer is also very good. I have issues with allergies, bronchitis and asthma but these systems, including the filters offer relief. Recent years added significant wildfire smoke in this region, but I got through that as well. Like this brand

My daughter left this machine when they moved to Japan. I almost sold it but I said “wait, I have a dog in my bedroom “! I bought this new filter- it for perfect. I love this machine!!