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Germ Guardian
Germ Guardian True HEPA Filter Don't forget to replace your air filter regularly with this True HEPA filter. Shop now.

GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction, 22-Inch

2,104 customer reviews
| 648 answered questions

About the Product

  • Captures 99.97% of allergens with True HEPA filtration including: dust mites, pet dander, plant pollens and more
  • Reduces odors from pets, cooking and smoking with activated carbon
  • UV-C light works with filter to kill airborne bacteria, viruses and mold spores
  • According to the American Academy of Pediatric Allergy and Immunology Doctors recommend HEPA air filtration to reduce exposure to indoor asthma triggers
  • 22-inch model best for medium and small size rooms

Frequently Bought Together

  • GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction, 22-Inch
  • +
  • GermGuardian FLT4825 True HEPA GENUINE Replacement Filter B for AC4800/4900 Series Air Purifiers
  • +
  • Carbon Activated Pre-Filter 4-pack for use with the GermGuardian FLT4825 HEPA Filter, AC4800 Series, Filter B
Total price: $130.12
Buy the selected items together

Product Description


germguardian AC4825 3-in-1 Air Cleaning System with True Hepa, UV-C Power and Odor Reduction

GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction, 22-Inch
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Ideal for Medium Size Rooms

Multiple Levels of Cleaning

GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction stands at 22-inches and has multiple levels of cleaning to capture allergens, kill airborne viruses and bacteria, and destroy mold and odors. It is ideal to use in medium-size rooms and is CADR rated 100+.

How it Works

First, a pre-filter and a charcoal filter combine to capture large particles like dust and lint, as well as destroy common household odors. Then, a True HEPA filter captures 99.97 percent of airborne particles, as small as . 3 microns in size, such as dust mites, debris, mold spores, plant pollens, and pet dander. According to the American Academy of Pediatrics Allergy & Immunology, doctors recommend HEPA air filtration systems to reduce exposure to indoor asthma triggers. Finally, UV-C light technology works to help kill airborne viruses and bacteria while Titanium Dioxide is activated by the UV-C light to decompose odor molecules caused by smoking, cooking, and pets.

Captures 99.97% of airborne allergens.
True HEPA Filtration

True HEPA is superior in quality when it comes to filtering allergens from the air. True HEPA filters are proven to capture 99.97% of airborne allergens such as household dust, pet dander, mold spores, and plant pollens and particles as small as .3 microns in size. That can make a big difference in air quality.

Reduces common household odors.
Odor Reduction

Reduces common household odors from pets and cooking. Also removes smoke particles and odor with an activated carbon filter.

UV-C light kills airborne bacteria and viruses.
The Power of UV-C

UV-C light kills bacteria and viruses, including: rhinovirus, E.coli, and streptococcus. UV-C light sanitizes by permanently damaging the DNA of germs so they die.

Energy Efficient with UV-C, True HEPA and Odor Reduction.

This product is CADR rated 100+ and is certified energy efficient. This product earned the ENERGY STAR by meeting strict energy efficiency guidelines set by the US EPA. The energy efficiency of this ENERGY STAR qualified model is measured based on a ratio between the model's CADR for Dust and the electrical energy it consumes, or CADR/Watt.

Multiple layers of filtration all in one filter.
New Feature! Indicator Lights for Filter and UV-C Bulb Replacement

Now equipped with indicator lights that automatically blink when it’s time to replace the Filter or UV-C bulb. No more trying to remember the last time you replaced your filter. Special note: as part of our quality promise – every purifier we make is tested before it reaches you. If the reminder lights are blinking when the air purifier is turned on for the first time, simply reset the system by holding the UV button for at least 3-5 seconds or until the reminder lights stop flashing. The product is now set and ready to go.

Ultra-Quiet Operation
Ultra-Quiet Operation

The GermGuardian 3-in-1 Air Cleaning System can be kept running all night thanks to ultra-quiet operation.

Product Details

Style Name: GermGuardian
Product Warranty: For warranty information about this product, please click here [PDF]|User Manual Manual [PDF]
  • Product Dimensions: 7 x 10.2 x 21.5 inches ; 7 pounds
  • Shipping Weight: 10.4 pounds (View shipping rates and policies)
  • Domestic Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • Origin: China
  • Shipping Advisory: This item must be shipped separately from other items in your order. Additional shipping charges will not apply.
  • UPC: 794628289250 895916000851 879488147947 799475064265 890100045205
  • Item model number: AC4825
  • Average Customer Review: 4.3 out of 5 stars  See all reviews (2,104 customer reviews)
  • Amazon Best Sellers Rank: #66 in Health & Personal Care (See Top 100 in Health & Personal Care)
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Important Information

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Actual product packaging and materials may contain more and different information than what is shown on our website. We recommend that you do not rely solely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. Please see our full disclaimer below.

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

1,961 of 1,985 people found the following review helpful By Toddler Teacher on July 21, 2012
Style Name: GermGuardian Verified Purchase
My toddler and I both have severe allergies and asthma. To the point that over the past month we have both been having major issues with the pollen and smog in the air, even with being home most of the time! I ordered this one after doing A LOT of research, and I decided this was the best for the money. With a true HEPA filter that you replace once a year (opposed to once a month) it would save money in the long run. I chose this one for the den in our house and over the coming weeks we will be getting smaller ones for the bed rooms.

This review for right now is 24 hours in to having it on in the house, and later I will come back and add to it.
Set up was easy straight out of the box, and I put it out of traffic areas in the house. I was worried with where I put it there would be trouble for good air circulation, but it is doing great! In fact with it on high I noticed a tag on the other side of the room (directly across) was moving on one of the toys yesterday as I was cleaning. Then I cooked fish last night (our den has an open doorway to the kitchen), and I couldnt even smell it cooking!! I decided to test it this morning, and sat on the couch painting my nails. Even using nail polish remover I couldnt smell it!!! (which astounds me b/c I hate doing my nails simple b/c of the toxic fumes!!) As far as noise, its not that bad. On high, with the tv and with kids running around it is a little white noise and thats it. I sleep with the bed room doors open, and having a tower computer on in the den annoyed me, however on medium I couldn't even hear it in the den! It also moves a lot of air b/c even when the ac isnt blowing air, it feels like it is b/c of this tower!
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428 of 459 people found the following review helpful By Chandra Faulkner on January 25, 2012
Style Name: GermGuardian
I just purchased this device and put it into service yesterday to combat the terrible mold issue in our old apartment, and also because we have dust and cat dander no matter how often I dust and vacuum. Where there is a mold flare up, my daughter coughs all night long (and ends up getting sick), which happened two nights ago and prompted me to make this purchase. Last night however, there was zero coughing. The air actually smells and feels fresh and we both slept incredibly well. Its very quiet, sleek looking, and Energy Star rated so I don't have to worry too much about using it 24-7.

The previous review said that it emits a strong plastic odor. That odor is present the minute you take it out of the box, like all new things made of plastic. After running it for about 18 hours, the smell is barely noticeable and I'm sure will continue to fade away. In fact, food odors get trapped in the bedroom every time I cook, but not last night! Its the only room in the house that doesn't smell like the garlicky beef I made for dinner. :)
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441 of 475 people found the following review helpful By Kate W on December 30, 2013
Style Name: GermGuardian Verified Purchase
I purchased this about 4 months ago, and I have to say, it has changed my life! I have two large dogs and allergies. Though my dogs don't shed much, they still have dander and they used to send me into middle of the night asthmatic fits. I wasn't sleeping a full night through without a double dose of allergy medicine and an inhaler (and even then it was iffy)...Until I got the GermGuardian. Upon first use there was a little of that "new plastic smell," but it went away after about 36 hours of continuously running it. The first night I used it, I took my allergy medicine, but did not have to use the inhaler. Did not wake up once! The second week after using it, I noticed that there was less dust in our bedroom, and I had been able to take my allergy medicine less and less (now maybe once a week if that). In fact, I haven't touched my inhaler in over two months!

I am going to buy a second (larger unit) for our upstairs living area. I take the smaller one upstairs while I'm cooking if I am making something that is really smelly (like fried fish or bacon) and run it while I cook. It really helps to minimize the amount of lingering odors. It would be nice to not have to move it around all the time!

The best part though...In this yucky cold and flu season, I am pretty sure the GermGuardian kept me from getting full-blown sick! I started to feel a sore throat and stuffy, but it never broke out into a full cold.

I have recommended this item to four people who ordered it, and all of them said that they are noticing a huge difference in the air quality in their home.

***ONE THING TO NOTE*** You have to rinse the thinner filter off about every two weeks (and be careful, it can tear easily). I don't recommend vacuuming it (I tore it up, and it didn't seem to get all the crud out). I usually just rinse it out in the tub with cool water and let it air dry for about 5-10 minutes. It will help prolong the Hepa filter in it.
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692 of 752 people found the following review helpful By Amazon Customer on December 14, 2013
Style Name: GermGuardian
I have been running my air purifier 24/7 for almost a month now. Got this right before Christmas. I haven't had any problems with this unit.

1) Really cleans the air- after just a WEEK of use, the outer (carbon) filter was covered in dust! Disgusting, but I'm satisfied to know that wasn't in my lungs. I vacuum the filter once a week.

2) HEPA filter. Although I can't actually "see" what it is catching, I know it is helping my air quality! I live in Utah where the inversion pollutes the air on a regular basis during the winter. This air purifier gives me peace of mind, knowing that when I come home I am in a clean air environment. Not only that, but it catches dust mite allergens, pollen, plant spores, bacteria, fungi, mold, smoke, dust..... We are definitely sleeping better at night, not waking up with the usual "stuff" that you have to clear out of your throat in the morning... catch my drift?

3) UV light- peace of mind that the germs that are caught by this thing are killed.

4) Catches SMELL (carbon filter)- I am used to smelling leftovers when I let my pots/pans soak in the sink overnight. Not anymore! I know this works because one time we went out of town overnight and turned the unit off. When we came back, our apartment smelled like soaking dishes/leftovers. A smell I'm glad to be rid of using this unit!


1) When I first got this unit, the lowest setting was pretty quiet. It is noticeably louder now. However, at this setting me and my husband are still able to sleep with the unit in our bedroom at night. AKA not too loud for sleeping (and I used to sleep strictly with earplugs for 2 years straight, so that should tell you something!). Because the fan got louder, I rate this product 4/5 stars.
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GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction, 22-Inch
This item: GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction, 22-Inch
Price: $86.00
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