Carbon Activated Pre-Filter 4-pack for use with the Germ Guardian FLT4825 HEPA Filter, AC4800 Series, Filter B By Complete Filtration Services

The filters were folded over in open plastic bag without labeling.

Good quality and value. fast shipping

Was able to cut these up to fit in my Holmes hepa old air purifier. I cut these a little larger than the size the Holmes came with so they fit snugly and their are no leaks. The old Holmes is like new.

Product is good and performs well but gets folded up and sent in a bag, leaving the filters crumpled and creased and difficult to make them stay in place and fitwell on the larger filter. I set mine underneath a book for several weeks to get it to flatten out. There really should be another velcro spot halfway down the filter to hold it more securely. Otherwise the product works quite well.

I just changed my pre-filter after 3-4 months of use. I changed it based on time rather than a change in machine operation. It was extremely dirty; it looks like it did its job well. It protected the more expensive HEPA filter. Will buy more when needed.

Works fine but needs to be changed frequently. Like once a month maybe. Otherwise its gets blocked and the noise level increases

Good product for the price. I recommend using these filters instead of replacing the entire cartridge. Just clean and vacuum the cartridge with the vacuum hose attachment.

I recently purchased a replacement HEPA filter for my GermGuardian and didnt realize that it also came with a carbon activated pre-filter, so I also ordered this 4 pack. The quality is the same as the one that came with the GermGuardian branded HEPA filter, although the sizing was a bit different. I do not think I would have a problem fitting this into the GermGuardian, but they are also easily altered simply by cutting them with a scissors. As I had 4 more carbon filters than I needed for a while, I used two of them for another separate air conditioner; I cut the filters to fit and inserted them behind the mesh filter in front of the rear air intake, effectively adding an additional filter where there was none from the factory. As the air conditioner runs 24/7 in the summer, I now had the added benefit of extra air/odor filtration, and the room smelled noticeably crisper. These filters will work for your GermGuardian and are a good value, but be aware they can also be reconfigured for other applications where you might need a carbon filter. I even saw a picture on a website of someone who had attached them to the rear of an oscillating fan to help with filtration! Excellent for multipurpose use.

These are nice and cheap, which is great, but before you buy these, try washing the one you have off under the sink. If you are careful, you can probably reuse the filter a few times.

Easy to replace