6 Best GermGuardian Air Purifiers for Clean Air in Your House (Spring 2022)

Air purifiers have become increasingly popular in recent years as people become aware of how important it is to breathe clean air that has minimal harmful toxins and pollutants. As the market for air purifiers has grown,

brands such as Germ Guardian, have increased their product range, catering for all ends of the market. Given such product variety, we’re here to help you choose the best value product.

In this review article, we have reviewed 6 GermGuardian products that are currently available to purchase. These products include affordable to premium range items to give you access to the market range.

Our editor’s choice for the best GermGuardian air purifier is the GermGuardian AC5900W. This product is ideal because of its ability to operate in large rooms – it has by far the largest square-foot range of all GermGuardian air purifiers. For more information, check the in-depth reviews.

Factors we consider important when you are looking to purchase the best GermGuardian air purifier to suit your needs include the dimensions, weight, filters, CADR rating and working area.

This article begins with a comparison table of all the reviewed products – containing purchasing links, nominations and ratings.

This is followed by the 6 in-depth product reviews which include key features, pros/cons and product descriptions. The buying guide outlines all the essential purchasing information and also contains a short FAQ. The verdict concludes the article with our top three choices for the best GermGuardian air purifier.

Quick Summary

Editor’s Choice: GermGuardian AC5900W

“High-quality GermGuardian air purifier that can clear the area of 338 square feet and has impressive CADR rate.”

Premium Pick: GermGuardian CDAP4500B

“Slim and stylish GermGuardian air purifier with HEPA and activated charcoal filters, it has 5 speed settings and air quality monitor.”

Best Value: GermGuardian AC4825

“Fairly priced GermGuardian air purifier with UV-C light, automatic reminder for filter replacement and energy-saving mode.”

Best Lightweight Air Purifier: GermGuardian AC4820

“Lightweight GermGuardian air purifier that work fine with areas of up to 158 sq ft and has 3 speed settings.”

Best Pre-Filter Technology: GermGuardian AC5350B

“Air purifier tower with 5 speed settings, works well in medium sized and big rooms, has optional UV-C light.”

Best Smoke Protection: GermGuardian AC5250PT

“Reliable GermGuardian air purifier for wide rooms, has 5 speed variations and high CADR ratings.”

Top 6 GermGuardian Air Purifiers Review 2022

1. GermGuardian AC5900W

GermGuardian AC5900W


Dimensions: 9.6 x 15.9 x 20.8 in

Filters: HEPA, activated charcoal

Working area: 338 sq ft

Weight: 13 lbs

CADR: 220 dust, 215 pollen, 218 smoke

More features: 6 ft. cord, UV-C light, AHAM verified, Energy Star certified, 3-speed settings, 8-hour timer

The GermGuardian AC5900W is a three-in-one air purifier that is perfectly designed for your home. This product is part of Germ Guardian’s premium range of products, ensuring a stronger performance and better long-term durability.

The true HEPA air filter, a feature of the majority of GermGuardian air purifiers, can reduce up to 99.97 per cent of harmful germs and toxins.

One of the reasons why the GermGuardian AC5900W is a premium range product is due to its increased power level. This 21-inch device filters air at 4 x per hour when operating a maximum speed in large rooms. This speed is very impressive when compared to the other GermGuardian product range.

The GermGuardian AC5900W has a variety of different settings for you to manually operate based on your own air purifying needs. Whether it be the 3 different performance speeds, an hour timer or a UV C light which can be operated on request.

The GermGuardian AC5900W has all the basic functions that you need. Another advantage is that the device has a quiet operation which reduces the chances of it causing any disturbance.

In addition to filtering pollutants in the air, the GermGuardian AC5900W can also reduce the stench of any undesired odors that make exist in your home.

This capability is enabled from the activated charcoal filter which can absorb the unwanted smells. The GermGuardian AC5900W measures 9.6 x 15.9 x 20.8 inches and weighs only 13 lbs.

Why is it special?

  • Works well in large rooms
  • High-speed performance
  • Filters unwanted odors
  • High CADR rating
  • Does not take much space

What are the flaws?

  • Expensive replacement filters
  • Premium price

2. GermGuardian CDAP4500B

GermGuardian CDAP4500B


Dimensions: 8.8 x 6.4 x 22 in

Filters: HEPA, activated charcoal

Working area: 153 sq ft

Weight: 9.9 lbs

CADR: 116 pollen, 107 dust, 99 smoke

More features: 5-speed settings, UV-C light technology, Air quality Monitor system, voice control, app compatible, 6 ft cord length

The GermGuardian CDAP4500B is a premium range GermGuardian air purifier, which is also considered to be the best model among plug-in air purifiers, and has modern technological advances that allow it to easily fit into a modern smart home.

For those who seek to have remote control of their air purifier, the GermGuardian CDAP4500B is the ideal choice due to it being WiFi and Bluetooth enabled. You can easily monitor and alter device performance through the Guardian Technologies App that also sends through notifications.

Another great feature of the GermGuardian CDAP4500B for anyone who is technologically savvy is the voice control features which can be fitted to Alexa or Google voice control devices. The GermGuardian CDAP4500B is a four-in-one air purifier that is designed to reside in the comfort of your own home.

The HEPA air filter performs similarly to other GermGuardian products in being able to reduce 99.97 per cent of harmful air pollutants. The GermGuardian CDAP4500B does also contain an air quality monitor that automatically changes speed depending on the specific needs of a room. This feature is great in being able to save the energy usage of the device.

The GermGuardian CDAP4500B has a vast range of 5 different speed settings to choose from as well as the automatic mode and an option UV C light. This wide range of settings as well as the Bluetooth connectivity outdoes the majority of other GermGuardian performance – somewhat justifying the premium price.

Why are we impressed?

  • WiFi and Bluetooth connectivity
  • Automatic setting

What negatives must you be aware of?

  • Issues with Alexa connectivity
  • High price

3. GermGuardian AC4825

GermGuardian AC4825


Dimensions: 10.25 x 6.75 x 21.5 in

Filters: HEPA, activated charcoal

Working area: 167 sq ft

Weight: 8.5 lbs

CADR: 118 dust, 125 pollen, 108 smoke

More features: UV-C light, Energy Star certified, filter replacement reminder, 6 ft cord length, 3-speed settings


The GermGuardian AC4825 is a fantastic value GermGuardian air purifier that offers similar performance capability to other more expensive items in the product range. This three-in-one air purifier can reduce up to 99.97 per cent of pollen, dust and germs that reside within your home.

The CADR rating is Dust (118) Pollen (125) and Smoke (108) which also performs well compared to other air purifiers.

In terms of available settings, the GermGuardian AC4825 performs similarly other medium-range air purifiers which have 3-speed settings and an optional UV C light. To improve the lifespan of the HEPA filter, the GermGuardian AC4825 pre-filter has technology that traps large particles of dust and pet hair before hitting the filter.

If you have previously purchased an air purifier that had an annoyingly loud sound when it was being used, you can be reassured that the GermGuardian AC4825 will not have any disturbing noises when being performed.

The GermGuardian AC4825, like other GermGuardian products, has quiet performance technology to ensure that it will not disturb you.

The GermGuardian AC4825 is Energy Star certified which means the device will not radically increase your energy bill. The device also has a filter replacement reminder system to ensure that you do not get inefficient operation with a filter that needs replacing.

The GermGuardian AC4825 offers great value performance for a cheaper price than Germ Guardian’s premium range products. It is an ideal choice for those who are new to the air purifier market.

What makes it special?

  • Great value
  • Filter replacement reminder
  • Quiet performance

What cons did we find?

  • Issues with a burning plastic smell
  • Emits a lot of heat

RELATED: 5 Best Air Purifiers under $100 — an Economical Solution to Keep Your Home Air Clean! (Spring 2022)

4. GermGuardian AC4820

GermGuardian AC4820


Dimensions: 8.5 x 12 x 23.3 in

Filters: HEPA, activated charcoal

Working area: 158 sq ft

Weight: 8.5 lbs

CADR: 112 dust, 131 pollen, 102 smoke

More features: 6 ft cord length, AHAM verified, 3-speed settings

The GermGuardian AC4820 is a medium-range air purifier reduces up to 99.97 per cent of harmful pollutants that can be found in your home.

These often invisible pollutants include pollen, pet dander, dust and germs. The GermGuardian AC4820 is a great value for choice if you have never purchased an air purifier before and want a product that will not break the bank.

The dimensions of the GermGuardian AC4820 are 8.5 x 12 x 23.3 inches which fit within the standard model sizes of GermGuardian products. The CADR rating for the GermGuardian AC4820 is 112 dust, 131 pollen,

102 smoke which is a marginally reduced performance capability compared to premium range GermGuardian air purifiers. That said, the difference is not so dramatic that you will not see a huge difference in performance.

The GermGuardian AC4820 has similar quiet performance capability to other GermGuardian air purifiers. This ensures that you will hardly notice its presence in your home, while you can benefit from the cleaner air that it produces. The use of activated charcoal in the filter assists with catching any unwanted odors inside your home.

The GermGuardian AC4820 can operate within a 158 sq ft which can cover a medium to large size room. This air purifier offers decent value for money and will not mean you have to break the bank. The product also includes a convenient 6 ft long cord so that it can be easily fitted in your living room.

Why are we impressed?

  • Lightweight
  • Activated charcoal filter
  • Affordable price

What negatives must you be aware of?

  • Slightly louder than other GermGuardian products

5. GermGuardian AC5350B

GermGuardian AC5350B


Dimensions: 9 x 6.7 x 27.6 in

Filters: HEPA, activated charcoal

Working area: 167 sq ft

Weight: 11 lbs

CADR: 114 dust, 127 pollen, 108 smoke

More features: 6 ft cord length, UV-C light, 5-speed settings


The GermGuardian AC5350B is an affordably priced air purifier that is a four-in-one device. This product can catch the vast majority of harmful pollutants such as mold spores, allergens, pollen and dust. In addition, the GermGuardian AC5350B can help to kill any harmful viruses that are air born – these include influenza and rhinovirus.

The device can kill germs thanks to the technology that operates with Titanium Dioxide to reduce the presence of organic compounds that can be volatile.

To improve the lifespan of the HEPA filter, the GermGuardian AC5350B uses pre-filter technology which can catch larger particles such as pet hair without having them work the expensive HEPA filter.

This technology is important as it can save you money in the long run, with HEPA filters costing up to $70 to replace. And even more detailed information about filter performance  as well as other essential features, you can encounter in the GermGuardian AC5350B review.

The GermGuardian AC5350B is one of the tallest products in the GermGuardian range, measuring at 9 x 6.7 x 27.6 inches. The square footage range of the GermGuardian AC5350B is 167 sq ft, which is a standard range when compared to other GermGuardian air purifiers.

The CADR rating of the GermGuardian AC5350B is 114 dust, 127 pollen, 108 smoke which is line with the GermGuardian range. It is recommended that when replacing the filter, you choose genuine GermGuardian Technology filters which will need replacing every 6 to 8 months. To ensure efficient performance, you need to monitor the filter regularly.

What stands out?

  • 5-speed settings
  • Strong CADR rating
  • Pre-filter technology

What cons did we manage to find?

  • Bright lights on the top that can disturb sleeping

6. GermGuardian AC5250PT

GermGuardian AC5250PT


Dimensions: 11 x 6.75 x 27.25 in

Filters: HEPA, activated charcoal

Working area: 180 sq ft

Weight: 11.25 lbs

CADR: 123 dust, 128 pollen, 116 smoke

More features: UV-C light, 6 ft cord length, Pet Pure™ added, 5-speed settings

The GermGuardian AC5250PT is a high-performance GermGuardian air purifier that has one of the strongest CADR ratings with scores of Dust (126), Pollen (128) and Smoke (116).

This card rating is significant because the higher the rating, the faster the unit is able to filter the air. This rating ensures that the GermGuardian AC5250PT is one of the most efficient air purifiers in the GermGuardian range.

The GermGuardian AC5250PT is AHAM Verified and Energy Star certified which means that the product is safe to use and has good energy usage. In terms of square footage, the GermGuardian AC5250PT performs well as it can filter the air in a 180 sq ft space.

The GermGuardian AC5250PT can not only filter pollutants such as molds and germs but can also purifier smokers air. The addition of a charcoal filter reduces common smells produced by pets, smokers and wildfire.

The smoke purifier is particularly important in reducing the chances of passive smoking. If you are a smoker and are conscious of those around you, purchasing the GermGuardian AC5250PT could go a long way to protecting the health of your friends and family.

Other features of the GermGuardian AC5250PT include UV-C light and a convenient 6 ft cord. The product also has 5 different speed settings that can be easily adjusted based on your air purifying needs.

The GermGuardian AC5250PT also has a 5-year limited warranty which can prove very useful should you encounter any performance issues.

Why is it special?

  • Generous warranty
  • Strong CADR rating
  • Good range of speed settings

What are the flaws?

  • UV-C bulb not long-lasting
  • Potential fire hazard

Things to Consider

Air pollution is increasing every year, making living in cities dangerous. Those suffering from allergies and asthma find air purifiers very helpful as they remove pollutants and allergens from the air. However, there are a lot of GermGuardian air purifiers in the market and it can be hard to find the best one.

This buying guide will give you the information that you need to purchase the best GermGuardian air purifier to satisfy your desires.

Why choose GermGuardian air purifier?

GermGuardian is a reputable company that manufactures the best air purifiers in the market. This is because of the following reasons:

  • Air purifiers from GermGuardian are reasonably priced and they have a variety of options in size, design and price.
  • Owning a GermGuardian air purifier will ensure that you and your family breathes clean air throughout the year.
  • Air purifiers from GermGuardian are very effective in cleaning the air in your home from pollution and impurities that might cause allergies.
  • Air purifiers from GermGuardian are also effective in getting rid of dust in the air in your home, especially those with the HEPA filters hence reducing the time of cleaning your home.

How to use GermGuardian air purifiers

The GermGuardian air purifiers clean particles and dust out of the air as well as killing bacteria and viruses to ensure that the air you and your family breath is fresh and clean. These air purifiers are easy to use and understand.

Most of them come when they are fully assembled and ready for use, even the filters are already placed. You just need to plug it in, turn it on and choose a power setting that you desire.

To get good circulation of air across the whole room, most people put the GermGuardian air purifiers away from the wall while others put it in the middle of the room.

All the GermGuardian air purifiers will come with a manual that indicates the room size that it can be used in. always buy one that is recommended for your room size to ensure that all the particles, dust and other pollutants are removed from the air in your room.

Price range

When you are thinking of purchasing an air purifier, the first question that comes to mind is ‘how much does it cost?’ The truth is, there are a variety of GermGuardian air purifiers available for every budget. However, you need to make sure that the air purifier you purchase serves your needs.

Whether it is removing airborne bacteria, clearing smells, removing allergens or simply cleaning the air that you breathe. The GermGuardian air purifiers reviewed above have a price range of between $80 to $160.

Features to consider while buying the best GermGuardian air purifier

Before purchasing the best GermGuardian air purifier that satisfies your need, you need to consider the following features:


The warranty will ensure that you have security over your investment. Check the product manual to see whether the air purifier has a warranty or not. GermGuardian air purifiers have different warranties ranging from one year to five years, as seen with the GermGuardian AC5250PT.

Some GermGuardian air purifiers have a return policy for repairs in case a part of the air purifier is damage. You need to find out from the manufacturer what parts are covered and for how long so that you can return it when they are damaged.


The most common type of filter used in GermGuardian air purifiers is the HEPA (High-Efficiency Particulate Air).  GermGuardian air purifiers with HEPA can filter up to 99.97% of pollutants and other particles in the air including animal dander, pollen, dust and mold spores.

If you suffer from allergies, ensure that the GermGuardian air purifier you purchase has a HEPA filter. However, if you want to get rid of odor in the air, find an air purifier with an activated carbon filter (ACF). Generally, ACFs with light mesh get rid of cooking odors while activated carbon pellets get rid of chemical and gaseous odors.

If you want to stay away from germs and bacteria, find a GermGuardian air purifier which has an antibacterial coating on the filters. For your filters to last longer, find a model with washable pre-filter that collects large particles and dust.


There are two standards for air purifiers that are taken seriously in the industry, they include AHAM (American) and China certification. Both of these certifications ensure a minimum standard of performance and quality of an air purifier.  Before purchasing a GermGuardian air purifier, check the type of certification it has.


GermGuardian air purifiers come in different good designs and strong constructions. Some air purifiers such as the GermGuardian AC4820 are made of strong aluminum and plastic material that can serve you for a long period of time when well maintained.

Some air purifiers have a stylish and classic speaker design which gives you an entertainment look. You can use these types of air purifiers to decorate your room and office while cleaning the air at the same time.

Convenience to use

The GermGuardian air purifiers that you purchase should be easy to use. The manual that comes with the air purifier should be easy to understand when you read it. It should clearly show how to turn on the air purify and operate other settings.

The manual should also show how to change the filters in the air purifiers and the changing process should also be easy. Cleaning the air purifier should be easy as well to ensure that it is well maintained to last longer and serve its purpose of cleaning the air.

Coverage area

This is the total area in which an air purifier can effectively clean using the CADR. Before purchasing a GermGuardian air purifier ensure that you check the CADR first.

An air purifier with a higher CADR will cover a larger area while an air purifier with a smaller CADR will not be effective and efficient in a larger space. Therefore, make sure that you get area specifications of the space that you want the air to be purified.


When air purifiers are cleaning the air, they are generally noisy. But if you do not like noisy environments, then you should check the noise levels of the GermGuardian air purifiers you want beforehand. You can get this information online either through the company’s website or other customers’ reviews.

The ideal noise level for air purifiers is 35 decibels when the fan is operating at top speed. If the noise level is above 55 decibels, the air purifier will be noisy and it can be disturbing. Most GermGuardian air purifiers come with a sleep mode that reduces the noise levels at night when you want to sleep.

The GermGuardian AC4825 offers great value when it comes to having a quiet operating performance.


CADR stands for Clean Air Delivery Rate, which is how quickly and efficiently an air purifier works. CADR measures how many cubic feet of air a purifier can filter in one minute for the different categories such as smoke, dust and pollen. This means that your room size will affect the CADR rating of an air purifier.

For a 200 square foot room and below, the CADR must be at least 134 CMH. For a 450 square foot room, the value should be at least 300 CMH and for a room of up to 680 square foot, the CADR value should be at least 453 CMH. If your room is larger, the CADR should be higher than 500 CMH.

The GermGuardian AC5250PT has one of the strongest CADR ratings of the products reviewed in this article.

Apart from the CADR, you should also consider the ACH (Air Changes per Hour) before purchasing an air purifier. This is the number of times an air purifier can clean the air in its recommended coverage area in an hour. The ideal Air Changes Per Hour for an air purifier is 4.


Most GermGuardian air purifiers have the night mode that reduces the noise levels at night when you want to sleep. These purifiers also have fan speeds that are adjustable to your liking.

You can increase the fan speed when you leave for work in the morning so that it can purifier the air much faster and then lower it back when you get home.


The following questions are frequently asked by customers and owners of GermGuardian air purifiers:

Where are GermGuardian air purifiers manufactured at?

GermGuardian air purifiers are produced by a US company called Guardian Technologies. Access to free shipping for filters is only available in 48 states. Check out the Guardian Technologies

How to clean GermGuardian air purifier?

The following YouTube video shows you the simple steps of how you can clean your GermGuardian air purifier:

Can use a GermGuardian air purifier all night?

There is no problem in running your GermGuardian air purifier all night. It depends on the size of your room and the weather conditions. You can put the power setting on low at night as it is less noisy to enable you to sleep well and then run it on a higher setting in the morning.

How often should I change GermGuardian filters?

Filters used by GermGuardian air purifiers can last between six to eight months depending on how you use it. Therefore, you should replace these filters every 6 to 8 months. If you want to extend the life of your filter, you can vacuum off the carbon filter layer.

Our Verdict

Hopefully, this article has given you all the essential information you need to know when looking to purchase the best GermGuardian air purifier.

Our verdict on the top three best GermGuardian air purifier is:

The GermGuardian AC5900W finishes top of our rankings due to the large range that the air filter can cover as well as having high-speed performance.

The GermGuardian CDAP4500B comes second in our rankings due to its impressive Bluetooth connectivity and remote control, making it supremely convenient in the modern home.

The GermGuardian AC4825 comes third in our rankings due to the quiet performance and overall product value.

When you are looking to purchase the best GermGuardian air purifier, it is important that you take your time to do online research and read customer reviews to give yourself the best chance of purchasing a great value product.


1.About Us – Guardian Technologies

Guardian Technologies™ offers a full range of small appliance-based solutions which make it easy for people to live happier and healthier lives at home. We are a company focused on creating powerful, safe and innovative technologies, with an overarching goal to help facilitate healthier, happier home environments for consumers worldwide.


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