GermGuardian AC4825 22” 3-in-1 Full Room Air Purifier Review

Based on a report of the EPA (Environmental Protection Agency), indoor levels of pollutants may be two to five times higher compared to outdoor pollutant levels. What this implies is the value of indoor air quality can’t be taken too lightly. For numerous of us who spend most of our days indoors, it makes sense to purchase a quality air purifier that has multiple levels of cleaning the air.

In this post, we’ll talk about some of the pros and cons of the Germ Guardian AC4825 True HEPA Filter Air Purifier that is manufactured to catch allergens, eliminate airborne viruses and bacteria, and destroy mold & odors.

Introduction to the GermGuardian AC4825

First, a pre-filter and a charcoal filter are combined to capture large particles like dust and lint, as well as destroying typical household odors. Subsequently, HEPA filtration 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.

As reported by the American Academy of Pediatrics Allergy & Immunology, doctors recommend HEPA air filtration systems to decrease exposure to indoor asthma triggers. Last but not least, the UV-C light technology works to help eliminate airborne viruses and bacteria while Titanium Dioxide is activated by the UV-C light to decay odor molecules caused by smoking, cooking, and domestic pets.

Germ Guardian True HEPA Filter Air Purifier for Home, Office, Bedrooms, Filters Allergies, Pollen, Smoke, Dust, Pet Dander, UV-C Sanitizer Eliminates Germs, Mold, Odors, Quiet 22 inch 3-in-1 AC4825

Description of the GermGuardian AC4825

The GermGuardian AC4825 will come in a nice, 7×10.2×21.5 inches box. This air purifier is manufactured to get rid of allergens from the air that it discharges. According to GermGuardian, this air cleaning system is capable of capturing 99.97% of airborne pollutants. How can such a claim be supported? Well, the unit superposes different layers of protection:

– True HEPA filtration mechanism that is ideal for capturing plant pollens, spores, pet dander, and dust mites to name a couple of.
– UV light is suitable for killing airborne viruses and bacteria. The AC4825 features a UV based mechanism that eliminates viruses, bacteria, and other germs. Thanks to this layers, this unit – Successfully eliminate rhinovirus, streptococcus, and E. coli to make the air in your room germ-free. The UV-C light destroys these disease-causing microorganisms with a smart, energy-saving mechanism.

Odor Reduction stands. Pets and routine house activities can be sources of odor. Unless you decrease this bad smell, it can make the environment in your room unpleasant. The AC4825 is manufactured to decrease bad smell from your room to make a fresh environment. This system utilizes a carbon filter to get rid of odor and smoke particles from your room.

Features and Specs of the GermGuardian AC4825

– 22-inch plastic Tower
– UV-C light
– Measures 7″ x 10″ x 22″.
– 3-year limited warranty
– Clears up to 99.7% of dust.
– Clears allergens as small as .3 microns.
– Recommended for small-medium sized rooms
– Eliminates airborne mold.
– Fights household odors such as nail polish, pets, cooking and smoking

Germ Guardian AC4825

GermGuardian AC4825 Filter

The Germ Guardian AC4825 comes with an activated charcoal pre-filter which is a thin layer of activated charcoal. This pre-filter is connected to the HEPA filter. Both of these are put in the front of the UV-C light.

The 2 filters are combined into one filter pack and come together. They’re changed about every 8 months to one year and done at the same time. The changing expense is approximate $30.


There is not something to learn about how to use the GermGuardian 8425. Once you put it on you do not have to touch another button. The only thing you have to care about is the dust that accumulates on top of the air purifier, mostly when it’s switched off. A good dry cloth is sufficient enough to do all the cleaning, while you may either change the filters or vacuum them occasionally based on how frequently you use the GermGuardian.

Will the GermGuardian AC4825 clean my home?

The GermGuardian AC4825 air purifier is perfect for a 155 square foot room – basically, a small to medium sized area. This air purification product is perfect for a smaller bedroom or a small office. This air purifier should be used in a room where the area can be simply cut off (and all house windows and doors shut). This air cleaner is good at eliminating irritants, pet dander, mold spores, dust mites, pollutants, and regular domestic odors such as kitchen odors, smoke, and pet smells. The use of a UV-C light feature is convenient, due to the fact it eliminates germs in the air.

Based on the reviews, the AC4825 is great to eradicating the odors, specifically those from pets and the kitchen. More heavy smells, like odors from candles and incense, take a little longer to get rid of, but they’re eliminated if given enough time.

a couple of consumers talked about noticing a smell after switching the unit on for the first time, but the vast majority said that the smell disappeared after a couple of days. The presumption is that this odor is simply from the new plastic, housing the filters – most new items have that “new product” smell and it’s nothing to worry about.

Germ Guardian True HEPA Filter Air Purifier for Home

Multiple Stage Air Filtration

With its distinctive 3-Stage filtering ability, the GermGuardian AC4825 can cover a wide range of air pollutants. We’re going to get technical now, so bear with me.

The very first part of the 3-in-1 air purifier is the pre-filter which uses activated carbon to trap bigger particles found indoors such as dust, lint, and hair. Activated charcoal is very porous, and its uneven surface is great for trapping larger pollutants, but there is another gain to carbon as well. A carbon layer successfully removes odors stemming from household pets and cooking.

During the second stage, the air is filtered through a HEPA filtration system. True HEPA filters have to meet strict criteria which involve being able to collect close to 100% of airborne particles as tiny as 0.3 microns in diameter. For example, pet dander, dust mites, mold spores and pollen all fall into this group.

The third stage involves air filtration using UV-C light. Essentially, when the air is exposed to short range UV light (UV-C) which is regarded as to be the germicidal UV light pathogens such as rhinovirus, E.coli and streptococcus are killed.

Germ Guardian True HEPA Filter Air Purifier for Home Review


The GermGuardian AC4825 Air Purifier has all the glitz and glamor of a specialized quality air purifying system. The device comes with a pre-filter, a charcoal filter and a True HEPA filter that cleans the air of dust particles, dust mites, pollen and even particulates produced by wood burning fireplaces.

Regardless of the criticisms that have been leveled at this air purifier, it seems that the vast majority of the users have been satisfied with their buy. As outlined by them, this ENERGY STAR qualified device works so well at cleaning the air, some have stated that they can tell the difference in the air quality after a number of hours of use. Other people found out that it quite helps control odors from pets and cooking. Obviously, it makes the air so much easier to breathe. Other prominent features of the GermGuardian AC4825 include its modern design and that it functions quietly on the low fan setting.

The GermGuardian AC4825 Air Purifier will not entirely meet everybody’s needs. But if you’re in the market for a true HEPA air purifier that works well for small rooms for under 100 dollars, subsequently based on the customer feedback you’ll be pleased with this air purifier.

GermGuardian AC4300 vs AC4825 vs AC5300B vs AC5350B: Air Purifier Comparison

3 Recommended Air Purifiers
Best of the
Multiple Functions Budget Pick
(< $100)
Alen BreatheSmart Classic Large Room Air Purifier - HEPA Filter for Allergies & Dust - 1100 sqft - Graphite Dyson Pure Hot + Cool Link HP02 Wi-Fi Enabled Air Purifier,White/Silver LEVOIT Air Purifier for Home Smokers Allergies and Pets Hair, True HEPA Filter, Quiet in Bedroom, Filtration System Cleaner Eliminators, Odor Smoke Dust Mold, Night Light, 2-Year Warranty, LV-H132
Alen Dyson Levoit
Classic HP02 LV-H132
1100 SqFt 300 SqFt 130 SqFt
10 x 17.8 x 26.8 in 8.7 x 6 x 24.9 in 8.5 x 8.5 x 14.5 in
21 pounds 8.62 pounds 6.5 pounds

Air Purifier Banner
Best Air Purifiers Buying Guide
Best HEPA Air Purifiers
Best Air Purifier for Allergies
Best Air Purifiers for Mold
Best Air Purifiers for Smoke
Best Air Purifier for Bacteria
Best Charcoal Air Purifiers
Best Air Purifiers for Dust

Related Guides
Best Air Purifiers for the Office
Best Air Ionizers
Best Air Purifiers for the Baby
Best Air Purifiers for Pet Owners
Best Travel-Size Air Purifiers

The Best of HouseholdMe in Your Inbox!

We’d love to stay in touch, sign up for the HouseholdMe team to contact you with great news, content and offers.

* indicates required