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

This is the best value for the pre-filters Ive found.

This air filter is a quality item and works as specified.

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

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

The filters were folded into half. There is no way to smooth the folded winkles.

I use this 24 hours a day

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

Changing this pre-filter on a regular basis will extend the life of the hepa filter. Also, keeps the air cleaner. Well worth the modest cost.

I have owned three of these air purifiers for a number of years. Very easy to use quiet and do a great job. I have ordered this one for a friend who has severe asthma.

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.