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Germguardian AC4020-portable air purifier

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Set Alert for Product: Germ Guardian True HEPA Filter Air Purifier for Home, Office, Bedrooms, Desk, Filters Allergies, Pollen, Smoke, Dust, Pet Dander, UV-C Sanitizer Eliminates Germs, Mold, Odors, Quiet 3-in-1 AC4100 - $68.29
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☑ HEPA filter for removing 99.97% of airborne particles of 0.3 microns or larger;
☑ Charcoal filter for odor reduction
☑ Pre-filter for large airborne particles
☑ UV-C light to kill germs, bacteria, and viruses
☑ Removes dust, pollen, pet dander, pet hair, and mold spores
☑ Indicator light when the filter is dirty
☑ Lightweight plastic construction for easy portability
☑ 3 fan speeds, including low, medium, and high

Last updated on May 23, 2020 4:53 pm

Score & Analysis

Features Score



Price Range : LESS THAN $100

Group Rank : #15( out of 29 Products )


Average score in the group


Best score in the group



Overall Rank : #68( out of 85 Air purifier )


Average score in Air purifier


Best Score in Air purifier



Features Group This
Best Average Remarks Best Average Remarks
CADR (Clean air delivery rate) 235 133 below average
N/A 184.33 below average
CADR Dust 221 87.79 below average
66 164.7 below average
CADR tobocco smoke 207 81.62 below average
50 163.45 below average
CADR pollen 218 95.15 below average
76 176.64 below average
Air changes per hour 5 4.36 below average
4 2.8 Above average
Energy consumption [Watt] 15 38.29 Above average
N/A 65.6 below average
Room Size 600 170.59 below average
100 332.98 below average
Noise level [db]-Air purifier 24 43.67 Above average
N/A 41.09 below average
Airpurifier weight [lb] 2.9 8.03 Above average
3.7 13.22 below average
Warranty [Months] 60 33.86 Above average
36 42 below average


Regardless of how small or big your home is, some factors can affect the quality of the air you are breathing. Animals or pets come with dander, odor, and hair. Cigarettes and cooking create smoke. Grime and dust show up all over the place, most notably in the air, regardless of how frequent you clean. For those with small or medium size rooms, a decent air purifier packed with essential features can address the issue.  Germguardian AC4020 is one of the best charcoal air purifiers today and is popular because of its amazing features.

Key Features of Germguardian AC4020

UV-C Light Technology

The U V-C light technology is proven to destroy germs present in the air, water as well as surfaces.

It is extremely efficient in killing thin-walled bacteria and viruses that cause various kinds of health issues like tuberculosis, staph, bronchitis, pneumonia as well as meningitis.

The light changes the structure of the bacteria that cause them to die.

The filter of this air purifier has TiO2 or Titanium Dioxide that is set off the UV light to help in fighting the occurrence and build-up of germs, mold as well as bacteria.

Also, it decomposes molecules in odor due to cooking, smoking as well as pets.

High-Performance Allergen Filter

This is a mixture of an activated carbon filter and HEPA filter that is able to capture 99 percent to allergens and dust present in the air, at the same time lessen common odors from cooking, smoking as well as pets.

The layer of carbon covers this HEPA filter, thus reduce most of the most significant particles first.

Rather than separating the HEPA filter and Activated Carbon to two layers, the AC4020 Germguardian charcoal air purifier combines these two to lessen the size of the air filter and at the same time increase the gap in this unit.

With just the HEPA filter, this air purifier cannot assure high efficiency compared to t others equipped with True-HEPA filter.


The Germguardian AC4020 is portable. This air purifier is made to be lighter as well as easier to move from one place to another.


The Germguardian AC4020 charcoal air purifieris one of the most reasonable air purifiers available on the market today. However, you need to purchase the replacement filters a couple of time yearly.

This low value can be because it just integrated with three fan speeds, not like other expensive models.

This portable air purifier for cigarette smoke has 30 stage filtration system and UV-C lights for effectively killing the bacteria and germs. So, this Germguardian product is worth the money you are spending.

Germguardian AC4020-portable air purifier Prices

Price History

Price history for Germ Guardian True HEPA Filter Air Purifier for Home, Office, Bedrooms, Desk, Filters Allergies, Pollen, Smoke, Dust, Pet Dander, UV-C Sanitizer Eliminates Germs, Mold, Odors, Quiet 3-in-1 AC4100
Latest updates:
  • $68.29 - April 2, 2020
  • $69.99 - March 21, 2020
  • $52.21 - February 4, 2020
  • $54.99 - January 17, 2020
  • $54.98 - January 11, 2020
  • $68.29 - January 5, 2020
  • $59.99 - January 1, 2020
  • $49.64 - December 15, 2019
Since: December 15, 2019
  • Highest Price: $69.99 - March 21, 2020
  • Lowest Price: $49.64 - December 15, 2019

Additional information

Specification: Germguardian AC4020-portable air purifier



Mold spores



Bacteria and viruses

Chemical and gas fumes

Odros and smells

Pet dender

CADR rating

CADR (Clean air delivery rate)




CADR tobocco smoke


CADR pollen


Air changes per hour


Energy consumption [Watt]


Room Size


Noise level [db]-Air purifier


Filters & Sensors
Hepa fliter

True hepa Filter

Air quality sensors

Carbon filter

Filter replacement indicators


Washable pre filter

Other useful
Carrying handle


Digital control

Night light

Programmable timer

Technology-Air purifier
0.3µm particle removal (%)


Antimicrobial treatment

Ozone free

Photocatalytic oxidation

Plasma wave technology

Airpurifier Height [inch]


Airpurifier Length [inch]


Airpurifier weight [lb]


Airpurifier Width [inch]


Warranty [Months]


Wireless controls

Amazon Alexa-Air

Google Assistant-Air

App Control-Air

Remote Control-Air

Voice Control-Air


Is Germguardian AC04020 contributes to noise pollution?

No. This charcoal purifier works silently. Keep in mind that it is not a fan. Therefore, it’s not as noisy as a fan. It is made to move air quickly to circulate in the room. The Ac4020 works silently and will not disturb your sleeping. The only time you may hear the noise is when you set this to a higher speed. However, the noise it produces is tolerable.

Will this charcoal air purifier help in eliminating pet dander and odor?

Yes. The Germguardian is integrated with one of its kind technologies to effective eliminates particles, airborne allergens, mold spores, viruses, and bacteria that cause allergies.

How often the HEPA filters need to be replaced?

HEPA filters need to be replaced every six to eight months. However, it all depends on how you utilize the product. Filter A is the ideal filter replacement. Make sure to utilize authentic Guardian Tech replacement parts to ensure proper and utmost performance.

Is the prefilter washable? Can I reuse it?

Yes. The HEPA filter washable and can be reused.

What maintenance does it need?

Like many other air purifiers out there, Germguardian AC4020 also needs maintenance to prolong its lifespan and at the same time maintain its good performance. Maintaining this charcoal air purifier is so easy, just wipe the exterior using a clean cloth and brush the inlet and outlet.

How long the filter lasts?

The HEPA filters last for 6 to 8 months but still depends on how often you use the air purifier.

What is the lifespan of the prefilter?

The Germguardian AC4020 doesn’t come with pre-filter, instead of a carbon filter that lasts for 8 months of using.

Where to place this air purifier for maximum effectiveness?

This air purifier can be installed anywhere. However, it is advisable to put inside the living room and kitchen when the family usually stay. You can also put this machine in the bedroom or in the basement. The nine inches design of this air purifier is perfect to put in compact areas including bookshelves

What impurities/particles does this air purifier remove?

The Germguardian AC4020 is able to trap allergens such as smoke, dust mites, pet dander as well as pollen. It also reduced annoying odor and captures big particles and at the same time minimizes household odors due to cooking, smoking, and pets. It also fights germs like airborne bacteria, germs, viruses as well as mold spores.

What is the weight of this air purifier? Is it portable?

This is considered one of the lightest air purifiers available in the market at this point. It only weighs 4.6lbs, thus allow you to move this machine from one place to another.

Is GermGuardian offers a warranty to this product?

Yes. State of the art Germguardian AC4020 comes with a 3-years limited warranty. However, the warranty doesn’t include the HEPA filters and the UV-C lights that are intended to be replaced

Is there any specific feature integrated into this charcoal air purifier?

Yes. The Germguardian Ac4020 air purifier comes with UV-C light technology is one of a kind and exclusive to this air purifier. The exceptional 2 watts bulb with UV-C light is able to combat bacteria and germs; it also kills airborne germs, mold spores as well as viruses. It also comes with charcoal filter that eliminates odors. So, you are guaranteed that your home and your family are safe and sound.

Who should use this air purifier?

This air purifier is ideal for everyone. If you have pets inside your home or if any members of the family smoke, then keep the quality of air fresh by considering this air purifier. This will keep you and your loved ones safe and sound from harmful bacteria.

How much power does it consume? Is this energy star certified?

This air purifier just uses 2-watts bulb, and it just consumes 40 watts, which is really energy-saving product. Using this air purifier 8 hours a day will cost you $15 per year.

What is the room size capacity of this air purifier?

This air purifier can cover 100 square feet room, which is a bit lower compared to other brands.

Is there any app for wireless control?

No. There is no app available

What is the type of filter used in this purifier?

This air purifier is integrated with a HEPA filter that eliminates 99 percent of particles and carbon filter that effectively eliminate annoying odor.

How many speeds are there? Is the speed of the purifier adjustable?

This nine-inches air purifier from GermGuardian has 3-speeds that can be adjusted easily.

Does it emit ozone?

This is an environmentally friendly air purifier, and it doesn’t emit ozone.

Is there an automatic turn off feature?


Is there a servicing indicator to indicate the filter needs to be cleaned or replaced? Also, an air quality indicator?

Yes. This comes with an indicator light to know if the filter is dirty.

Is it remote controllable?

No. This air purifier is not remote controllable

What are the CADR values for this product?

The CADR of this air purifier is 76 cfm for pollen, 50 cfm for smoke and 66 cfm for dust.

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