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

Easy to install! Price is perfect! As simple as that!

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

Work well

I was a little skeptical about how much this would purify the air. Then i replaced the filter & WOW! what it filtered out was amazing! The picture makes it look like a brick pattern is on the filter, but no— the white is actually all the garbage that it filtered from the air! I definitely felt that my allergies were improved this spring/summer, but thought that maybe wearing a face mask at work helped too. In any case, it does the job, easy to replace filter. Literally about 10 seconds.

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!

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 definitely works. From dust, dander, smoke, particles in the air etc. There is no match for this unit. I would recommend a different unit if you are using this for your sleep schedule; near your bed. This is not the most quiet machine ever but it is not super loud. Right in the middle. I would consider this unit to be a Post Malone of the air scrubber world.

this is an air cleaner filter. it seems to work fine.

I found the genuine filter at this time to only be $1 more expensive than the off brands. Decided to go with a genuine. Came quickly an came with the charcoal pre-filter, which I had a hard time figuring out if it did on some listings. It did fit a little more snug than the original one that came with the air purifier. This is my first replacement so Im not sure if thats common or just a mishap. Either way it still works fine and I plan to keep vacuuming the pre-filter every 2 weeks.

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.