Free Shipping* on all orders over $30
Best Seller

FLT4825 Filter-B True HEPA GENUINE Replacement Filter

Availability: In stock - USA and Canada SKU: FLT4825
MSRP: $44.99

Regular Price: $34.99

Sale Price: $31.49

  • Buy 2 for $29.75 each and save 6%
  • Buy 4 for $28.00 each and save 12%
  • Buy 6 for $26.25 each and save 17%
Add to Cart
Free Support SSL Secure
Need Replacement Bulbs, Parts or Accessories?

Product Information

Replacement Combination Filter B 

The Guardian Technologies Replacement Filter B is a combination filter that incorporates multiple layers of filtration including: a pre-filter, charcoal filter and true HEPA filter, to help improve indoor air quality.

It is recommended that the filter be replaced every 6–9 months depending on use.

For use with Guardian Technologies™ models AC4825, AC4850PT, AC4900CA, PureGuardian AP2200CA and Black+Decker BXAP148

This is a GENUINE GermGuardian Filter. It is important to only use genuine Guardian Technologies replacement parts to maintain product performance and warranty. All parts that are not genuine will void the warranty.


Product Specifications

  • SKU: FLT4825
  • Weight: 0.35lbs.
  • Dimensions: 1.29 x 4.76 x 15.77
  • By completing this form, you agree to be automatically added to our marketing lists. We promise to respect your privacy. You can opt-out by clicking unsubscribe from any email you may receive from us.



Customer Reviews

By: Andrew

Good product, fast delivery.

I noticed a big difference in my allergies after a couple hours of use.

Delivery was very fast.

By: Mr. Steve

Fit like a glove!

Super easy swap out of old filter with the new one that fit perfectly. Since the manual covers two different models each with a different size filter I had to search for the model # on the unit to make sure I got the right one. No complaint. New filter arrived in perfect condition.

By: Brian

Happy with my Air Purifier Filter

Original filter lasted 9 months - I have noticed that my problems with dust (sneezing and running nose) have been greatly reduced.

By: Lisarose

Quick delivery

Product shipped fast and I had my new filter in a couple days. Lasts a long long time so I don't have to worry about having to change it out.

By: Kay

Good product; fast shipping

The replacement cartridges shipped very quickly, which was good, because we didn't have any backups on hand. I appreciated that the original box had all of the reordering information printed on it. That was very helpful!

By: viviana

great product

so far happy with the results.

By: TR

Rid me of dog odors!

I moved into a new house where dogs previously lived and figured that getting the carpet cleaned (2 times) would rid me of their odor. This did not happen. Because dog scent gives me allergies I needed to figure out another way to get rid of the smell. So I bought this. I put it on and woke the next morning without any nasal allergies at all! The one bad thing was that it left a new plastic smell in my room, but it went away after a week and was well worth the trade of smells. Sometimes I will put it in another room for a while, but when I start to get allergies for whatever cause I put it back I my bedroom and I go back to having open airways! I am now buying another one to see if it works on my mom's cat odors!


Can really tell a difference

I ordered three by mistake, but gave one to a friend. I can really tell a difference--when I'm stopped up, I just stay in there with door closed and I get un-stopped up. I am taking meds which help my sinuses and nose, so it is a wonderful thing for me. He absolutely loves his, and his wife is really happy too. Would highly recommend.

By: Kayla


This filter lasts for a long time, so it is a great buy to replaced an old one that is used up.

By: Liz Whelan

Good choice

THis really has helped clear the air of cat odor and now you have a hard time telling we even have pets.

By: Kent Chui

well made

little pricey. but well made like the original. i am happy with it. hope it can drop the price little bit. will recommended. Thanks

By: amanda faye olds

Does the job!

Easy to replace, although makes me wonder if price is really worth it. Could just clean off old filter with air compressor tool.

By: Mariacharmediots

Cool item good price

I like this germ guardian it helps cleaning up smoke and bad smells. I thought this was a really great price and for such a big guardian!!


Pure air

I've had this air filter system for over two years and it has made a difference. It's quiet and effective.

By: Sheila Sharkey

germguardian filter

I have some breathing problems and I find that using this product helps my breathing greatly, I also have cats in the home and I feel this keeps thee air cleaner.

By: Marilyn S Rubbo

great buy

we have a cat so even with the brushing and frequent cleaning the air quality was heavy. Also I love to cook so the smells lingered with the home. We notice within the hour a big difference in the fresher air quality.

By: Nelda Sexton

germguardian FLT4825 works great.

I haven't used this replacement filter yet, since I've just had the unit for a week. But I do love the air purifier. My husband has allergies and it has helped clean the air in the bedroom of the cat dander and hair that was floating around. He loves it too.

By: AMD "tropicslady"

Works great...

Helps a lot with allergies. Fairly quiet, but it does make some sound. I just consider it "white noise" that helps drown out the barking fan is louder.

By: Donna Bugarski

Love It!

We chose this for one room in particular that smelled like our animals. Then we ordered another, for the fresh feel to the room after it had been running. Wish we could afford one for every room in the house. In the meantime, we move them from room to room.

By: Ernest

Awesome filter

I bought a Germ guardian, i have using it one week and it help me a lot with my allergies, the filter has double protection, first has a sponge to catch big things, then has the classic kind of withe cloth to filter the dust and thin material.

By: Criminoogist99

Filter Goes With A GREAT Air Purifier

I bought this replacement filter earlier than I need it just to be sure I'm ready. The Germguardian 3-1in-1 Air Purifier is FANTASTIC. It's recommended especially for asthmatics (which I am) but would benefit anyone. It's tall (about the height of a computer tower) but compact and very sleek in the design. It has a UV light that kills pathogenic germs and the filter is a three in one and of course HEPA. I run mine non-stop in my room and it WORKS. The filter takes care of any allergens that are in the air (I live on a farm so there are plenty) and leaves my room "safe" for my asthma. When I have bad asthma attacks and I'm stuck in my room with my 'clean' air, I feel at least a little relief from knowing that this filter is working for me, and it does truly make it much easier to breathe in here. I HIGHLY recommend the air purifier that this filter goes with, ESPECIALLY for asthmatics. It's only $35 and trust me, you will never regret spending that on the GermGuardian.

By: Chad

Great price, great product, great results

Although I'm on the fence on the actual Germguardian unit I have, the filters and UV light kill and eliminate all orders. This replacement filter was reasonably priced, arrived almost overnight and does a great job. My previous hadn't been changed out in almost 2 1/2 years, so with gentle clean, you can maintain for more then 1 year.

By: ecolby44

Very effective fliter

This was my first filter replacement I purchased for my GermGuardian Air purifier. I love the air filter and after a couple months of usage and vacuuming the first part of the outer filter on my original filter I decided to buy a replacement since the inside was black. I received this air filter and was shocked to see that it was exactly like the first. I have bought replacement filters for other make/models of air purifiers and the replacement filters were always different than the original somehow. This was exactly like the original, including the removable black piece on the front that catches the larger pieces of dust and pet dander I have. It popped into my GermGuardian in 2 seconds and has been working excellent since.

Add Your Review * Required Information

Share Your Opinion

Let us know what you think about our products.

Have Questions?
M-F 8:30-4:30 EST