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

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.

The HEPA filters can be expensive and this little layer not only removes any odors from the air but acts as a prefilter for dust. This is a multi pack and you simply peal off the old one (best done outside) and then stick the new one on using the velcro strips.

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.

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.

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

I bought these to replace the outer charcoal pre-filter for the GermGuardian AC4825. The filter is cut to the exact size and it sticks very well to the velcro. The material is at least twice as dense as the original filter so will definitely help to filter out more large particles. However, I do worry that the density of the material will put extra strain on the fan motor. I guess Ill find out. Photos 1 and 2: product packaging Photo 3: Original filter (left) vs this filter (right). Right filter is much more dense. Photo 4: This filter installed on top of HEPA filter (left), original dirty filter (right)

Great filters. I love my purifier machine germ guardian.