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

Ive been buying these for a few years now and they just changed how the black filter is made. Im not a fan of the new material at face value. It looks like a way cheaper quality material and one that Ive never seen before in any HEPA filter. Im now happy about the change so far. Im still undecided if the change has degraded the quality of the filter in general. It also makes me question whether the white filter design was also cheapened. I was pretty happy with the Gem Guardian until now. UPDATE: Ive had this new filter in for about a week now and I was shocked how much dust was already on the black filter already. Im thinking this new style filter actually filters out more than the old one does so Im increasing my rating to 4 stars now. I also washed the black part and it didnt fall apart as expected and was surprisingly easier to clean than the older one. The old design would have dust getting stuck inside the holes of the filter and Id have to wash it for a while before i could get everythign out of it. The new one seemed to clean up much easier because the holes in the filter arent as big. It cleaned up well and didnt degrade like I expected. Overall Im actually liking the new design better now.

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.

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.

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.

Perfect for ease and does the job

Perfect fit just as advertised

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

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.

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.

I love my air purifier but having cats and living in New England means being ready for dander and pollen. I noticed a burning smells after several months of the original filter. The smell went away after replacing it with this one. An air purifier is one of the best things you can add to your bedroom.