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

Cleans air well.

I had my air filter for about 8 months. I have been using it 24/7 more frequently because I now live with a cat and am allergic. As you can see it works very well. I noticed when it needed to be changed when I started sneezing and was congested. Once I replaced it, I slept amazing that night with no congestion in the morning! It lasts a long time and is SO easy to replace. A very reasonable price for how long it lasts. I will update when I replace this current one to give a more accurate length when using it 24/7.

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

I really like my table-top filter. Judging by the discoloration that happens, I would say that the filter is taking a great deal out of the air in my apartment. Between allergens and other current health threats, I am glad to have these filters cleaning much of the stuff in my air.

The filter lasts about 3 months in my experience. The bulb has worked fine for over a year.

The Guardian Technologies GermGuardian Air Purifier Filter fit perfectly in my kids air purifier. The old filter was practically black and was in dire need of replacement. This filter fit perfectly in his purifier, started filtering out irritants in the air, and he stopped sneezing and was able to sleep well once it was replaced. If you have a small Germ Guardian Air Purifier, these filters fit perfectly in and will help get your allergies in check.

Been using the little air purifier for over a couple years now and its awesome. The filters are descent price and easy to find, so big plus. And they really do help keep the air clean in our bedroom. Definitely recommend.

Aug. 2019 product recd. Update on prior reviews. Been ordering these filters multiple times for a very long time. The purifiers work so very well. Noticed that the pre-filters are getting thinner and thinner. The 2 I just received are tissue paper thin and many spots thin enough to see the pleats on the main filter thru. Will keep an eye going forward to see if the filters are made thicker (as they used to be). If not, this will cause the main filters to have to be replaced even more frequently. Not something I am willing to purchase more frequently if not necessary. Works wonderful and keeps the air cleaner then expected for a smaller unit. Filter is easy to install and has to be changed with your usage of the purifier. A great system.

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.

We use this filter every night while our sons are sleeping. It’s aggravating to have to constantly check the pricing because it changes regularly. We are about to switch purifiers if I have to pay $20 a filter now when I can get the machine for sometimes as low as under $50.