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

This toilet bowl cleaner is the bomb. It makes it much easier for me to clean the toilet. It has enough cleaner that I can clean 2 toilets with one wand.

Work amazingly well and killing odors - even cat box odors. Once you the the filters - keep in mind you can cut them to fit other brands and sizes of air filters. I easily placed one in a brand of air cleaner that is no longer made - works great!

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.

Like the way they seem to clean the air. Expensive filters however.

It goes to my air purifier that I purchased from you but I have not installed these are extra

These carbon filters are half the thickness of original ones sent with the hepa filter 2 pack...not what I expected.

Works great in the air filtration unit but cannot be blown clean or washed. Must be replaced. So in the long run may be a little pricey

If you think this is a replacement for the one that comes with your air filter you are wrong. This is filter cloth but it looks as though someone free hand cut it with scissors including the wrong angles and thin pieces hanging on the side from bad cuts. they also do not have the Velcro boarder that sticks it in place. does it get the job done yes. Other side is look how much you are paying for it because thats what you would be getting for that price. Works, ill probably buy it again but dont expect perfection.

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 change this every month. Between dust, dog hair, etc. it gets pretty full by the end of the month. Seems to work.