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FLT4000 High Performance Allergen GENUINE Replacement Filter FLT4000 High Performance Allergen GENUINE Replacement Filter
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FLT4000 High Performance Allergen GENUINE Replacement Filter

Availability: In stock - USA Only SKU: FLT4000L
MSRP: $24.99
  • Buy 2 for $18.99 each
  • Buy 4 for $17.99 each
  • Buy 6 for $16.99 each
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Product Information

Use this filter as a replacement for models AC3900, AC4000, and AC4000CA.

The GermGuardian® Table-Top Air Purifier has one combination replacement filter that combines several filtering technologies. The GermGuardian® Table-Top Air Purifier has one combination replacement filter that combines several filtering technologies. A combination filter captures dust and allergens, and fights germs and unwanted odors. It is suggested that the filter be replaced every 6-9 months depending on use.

This is a GENUINE GermGuardian® Filter. It is important to only use genuine Guardian Technologies™ replacement parts to maintain product performance.


Product Specifications

  • SKU: FLT4000L
  • Weight: 0.11lbs.
  • Dimensions: 5.15 x 5.11 x 0.59

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By: JBlackburn

Excellent product

These filters, and the portable air cleaners that they fit, are great for a traveler with allergies like I have. Using the portable air cleaner in a room away from home makes quite a difference to my getting a good night's sleep when I travel. Thanks for making the ordering of the replacement filters so convenient.

By: Jackie Dial

not to be found in stores

The Replacement filters were not to be found locally, even though I originally bought the germguardian locally. I was pleased to be able to get them.

By: christine chadwell

Perfect fit

I had a hard time finding replacement filters in stores. These work great! I bought a few so I won't run out

By: C. Rethi

Very Good Product

I use these filters in my germguardian air cleaner which is in my bedroom. It helps with my severe allergy symptoms. Amazon is the only place I can find these filters any more. They are pricey, but well worth the purchase.

By: Theresa Howard

Works well

I have small rooms and it does very well what it is designed for. I actually keep it across the room in front of the AC and it keeps the room fresh. I use a small GermGuardian which I can move from room to room as for me it is more economical and effective.

By: Marissa A. Kehr

Happy Replacements

I was very happy to find these replacements without having to leave the house and hunt them down at a store.

By: Marilyn A. Farmer

Great price

These were bought for my small table top air cleaner for my bedroom. They were a great price, and I plan to buy more in the future.

By: Jennifer

Does what it claims...how refreshing!

I actually purchased the unit at a second hand store..but find it to be amazing. I raise small reptiles and it has totally removed any odor from the room within a couple hours. Its very quiet and really does what it says it can do. In this day and age, its refreshing to find a product which really does what it claims. I also like its 3 way purification system. Finally, I research the filters ( the filter which was in this unit appears unused) and found they are very reasonably priced. If this one ever breaks, I would purchase a new one.

By: Bunkster Brown


I have this unit in a very small bedroom, on top of my dresser. It is very effective in eliminating dust, pollen, and odors from the air. It has really helped my seasonal allergies. An added bonus is that it creates a soft, white noise that drowns out the sounds of city traffic. Really helps me to sleep. The filter lasts a very long time; I got about six or eight months from the most recent one, and that included a spring allergy season. I tried changing it after 3 months (which one reviewer said was its life), but the old one looked the same as the new one. This time, after six or eight months, they looked markedly different. The old one was filthy. Nice to know I'm not breathing all that gunk in! This little desktop model is well worth the money. When it dies, I will be very likely to buy another one just like it.

By: Mike M.

nice filter

appears to be the real deal. fits perfect. packed in original box. sometimes hard to find at stores, these arrived fast and at a good price.

By: P. Peterson

Really works!

I keep this machine on overnight while sleeping. It helps to clear my room of pollens, dust and other spore-types. The machine is small enough to take with me when traveling too.

By: K. Ball

Great filter!

This filter appears to do what it is supposed to do. Very easy to change...Wish it was a little less expensive for it's short life cycle of 3 months.

By: skeeter

Air Purifier Filter

I have been using this air purifier for two years and I am completely satisfied with its performance. Small size but for a desk top unit work really well. I believe it helped my seasonal allergies.

By: Runningwithdogs "Granddaddy"

great filter for a good air filter unit

This filter has charcoal, which naturally removes odors from the air. We find that it is very effective in small rooms, and truly gets rid of odors within an hour or two. We can't live without it (filter and unit). The price here is good.