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

This fit my GermGuardian model AC4100 like a glove. Easy to install - simply pop off the back over, remove the old filter, pay attention to the arrows and put the cover back on. Authentic filter replacement; will purchase again.

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

Works great

It works as expected. My last filter I changed at 90 days just because of COVID-19 pandemic. It wasnt gunky dirty but there was visible dirt just from running it a few hours a day. I wanted to change it to get rid of any virus germs that could have been lingering there.

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.

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

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!

The charcoal fabric filter could be more sturdy, after a few washes it loses its shape & integrity.

These Guardian air purifier filters are the absolute best. Even though they are small and for a smaller air purifier, they do an outstanding job at cleaning the air and making it fresh and breathable, especially for people like me who have allergies and asthma. And they do this even in a house with a lot of animals. I’m so impressed by how well these air filters work. I keep coming back and getting this brand filter for my air purifier because it simply does the job right. Highly recommend.

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.