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

Well if you have to buy filters then this is a good brand. I dont know much about filters however i have used this brand numerous times with no issues. Of course in hindsight i wish i bought a filterless air purifier but in the meantime i will continue to use this product. Yes i will recommend.

The unit covers my entire lower level of my home which includes the kitchen living dining room and sunroom, its a very powerful device. Great product for the price.

Good quality and value. fast shipping

I honestly didnt even know what these were when I got them. Now I know they make my filter last 4x longer. Nothing touched the filter with these pre-filters properly installed and changed regularly.

Sent the product back on 9/25 and still awaiting a refund. Nothing wrong with it, simply ordered the wrong filter thinking it was the complete filter system. This is the longest Ive ever had to wait for a credit for anything on Amazon. Oy vay...

Price is good but too big for the filter so I recommend cutting it to fit the length. Also you should really buy the original hepa replacement once a year because it comes with the WHITE and the black filters that are meant for the filter to work well.

good service/delivery good product. thanks

These were cheaper than the other filters offered by other sellers. I cannot say how well they work in terms of the activated carbon absorbing anything but it helps to be able to replace the outer filters when they become dusty. I put them in a 1 gallon zip top bag once I got them to keep them fresh (prevent the carbon from absorbing as much as it would otherwise). On the downside, although the width was correct, the filters are not tall enough so I have to cut one of the others to fill the rest of the filter area.

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.

Bad thing is to small for my machine, maybe was bad measured in the supply.