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

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.

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 use this 24 hours a day

Good quality and value. fast shipping

I hadnt bought these because I hate how much money it takes to keep up with the HEPA filter in my filter-fan, but I indulged because my allergies have been so bad and I have a dog, plus I hoped these would lengthen the lifespan of my filter. They do! And actually, there are five of these in one box and theyre washable so you can make them last longer! Plus, carbon filtering is so good for you. Worth it.

Exactly what they advertised.

Direct replacement, fits perfectly.

These filters are perfect for my air purifier! They are thicker than what came with the actual purifier. I also take the vacuum and clean out the dust they catch which makes them last even longer! Will definitely buy again.

The filter is a great way to extend the life of my HEPA filter. Right after the 4th of July I checked the carbon pre-filter on my air purifier. The particulate matter from all the fireworks near my home had really coated the old carbon pre-filter. It was great to be able to quickly change just that bit to extend the life of my HEPA filter. Its sill important to regularly change the actual HEPA filter, but I feel that changing the charcoal pre-filter really does help to extend it for a short time

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