GermGuardian AC4100 Small and Budget-Friendly – Review

Do you know any perfect air purifier? If not then let me introduce you to the GermGuardian AC1400. Its compact size makes it ideal for small rooms which have limited space. It is considered as one of the most sought air purifiers with a 3 in 1 HEPA filter.

The GermGuardian AC4100 serves you by providing better air quality by eliminating 99.97 percent airborne particles even as small as .3 microns. It also captures dust, plant pollen, and pet hair.

GermGuardian AC4100 3-in-1 Desktop Air Purifier

The presence of charcoal and PCO filter assists in removing odor occurring from cooking, pets, or smoking. Titanium dioxide is present in the filter that activates whenever odor is inspected and helps in decomposing it. UV-C light also destroys bacteria and viruses present in the air causing health issues.

GermGuardian AC4100 Specifications

Below is a complete list of important specifications and features included on the GermGuardian AC4100 Air Purifier:

Manufacturer Guardian Technologies
Model AC4100
Dimensions 7.5 x 6.5 x 11 inches
Filters Pre-filter and Charcoal Filter, True HEPA Filter and UV-C Light
UV-C Yes
Coverage 78 sq. ft.
CADR Dust 56, Pollen 76, and Smoke 50
Warranty 1-year
User manual PDF

GermGuardian Air Purifier Features

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Feature Info
UV-C Light Kills airborne germs including: staph, influenza, and rhinovirus. Titanium Dioxide is activated by the UV-C light to reduce remaining organisms.
Pre-Filter/Activated Carbon
Captures large dust particles and pet hair, extending filter life. Activated carbon traps household odors and harmful VOC’s


The GermGuardian AC4100 is compact, and its minimalistic design makes it the best air purifier for the house. It is designed in a way that it can be placed in any part of your room or office. It is also extremely light in weight that makes it possible to carry it around. If you are looking for an air purifier which is good for medium and small sized rooms, then you need to look elsewhere. GemGuardian AC4100 works perfectly in small rooms, but in large and medium rooms its power is lost.

Three stage filtration

The GermGuardian AC4100 has a three-stage filtration system that amazingly removes allergens and household odors. The air purifier has a proper filtration process. The first step is the filtration process; the dirty air passes through the machine that further activates the charcoal pre-filter. The pre-filter traps airborne bacteria and helps in getting rid of the bad odor, dust, and smoke particles.

The next step is where the air is passed through the HEPA filter. HEPA filter traps 99.97 percent of air particles as small as .3 microns. These particles usually contain contaminants that trigger asthma and allergies.

The third and last stage is treated by the UV-C light mechanism. This mechanism is a modern way of getting rid of common germs and dust. It efficiently penetrates bacteria and many thin-walled viruses that cause diseases such as pneumonia, tuberculosis, or bronchitis. It putrefies odor particles that emerge from smoke or pets. Because of that, it is highly recommended as an air purifier which is good for pets, cooking, and smoking.

3 Speeds and incredibly silent

The Germ Guardian air purifier has startling three various fan speed options. If you want no noise and satisfactory results, you can set the machine at a low setting. For proper operation and healthy air circulation set the parameters at medium. Whereas if you want optimal results and the best air circulation, set the fan at the high option. The high setting emits a lot of noise that is quite disturbing for many people, but if you keep the low settings on you will not even know the air purifier is working.

The GermGuardian AC4100 is considered as the best air purifier because of its efficiency and powerful operation. If you are tired of noisy air purifiers, then this is the best option for you because it is incredibly silent. You can place it in your office and work peacefully without realizing it’s there. It’s sleek, and compact design makes it possible to carry it around. It requires small space in your room. The low purchase price makes it even more desirable.

Although it works amazingly in small places, it is not recommended for larger areas. It only eliminates household odors and does not work for the heavy smell.

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Filters Replacement

GemGuardian uses the same HEPA filter for various GemGuardian air-purifying models. The HEPA filter comes with a pre-filter. The charcoal filter is also included, and that means that removing bad smells will work like a charm. GemGuardian HEPA filters are affordable, but you need to know that these filters are small because this air purifying model is small and because of that price for a filter is low.

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Feature Info
Item Dimensions 4.62 x 1.5 x 8.25 inches
Item Weight
3.2 ounces
Multiple Levels of Cleaning Multiple levels of cleaning include HEPA, Pre-Filter and a Charcoal layer to help improve indoor air quality.

Pros and Cons

To revise, here are advantages and disadvantages of the GermGuardian AC4100 air purifier:


  • Extremely Affordable Air Purifier
  • Small and Useful in Small Rooms
  • Powerful HEPA Filter
  • Silent Work
  • Uses UV-C Light Mechanism to Kill Unwanted Pollutants


  • Not Powerful Enough for Large Rooms
  • Will Require New Filters for Maximum Performance After Some Time

Final Thoughts

The GermGuardian AC4100 is best for tiny rooms and offices. It works efficiently in small spaces. If you are on a hunt for a cheap and reliable air purifier, then the GermGuardian AC4100 is undoubtedly the best choice. You don’t have to spend several hundreds of dollars on it. It can be your best investment as it is small and efficient.

Update Log

July 5, 2021 – I have improved the article design, added specifications, and rechecked some information about the product.

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