Germ Guardian AC4825 Air Purifier

The GermGuardian AC4825 is widely used to clean the air from possible contamination sources. It comes equipped with a True HEPA filter that captures 99.97% of airborne particles and uses UV-C technology to free the air from harmful agents that can lead to allergic conditions. A combination of filters is extremely effective as it transforms any space into a safe and clean environment. This is one of the TOP rated air cleaners in the niche of budget home air purifiers.

Germ Guardian AC4825 3-in-1 air purifier review


Germ Guardian AC4825: Basic Information

The device is produced by Guardian Technologies. The company puts special emphasis on making the human life healthier and thus happier through their wide range of appliances. High quality of products and progressive innovation made the company one of the most trusted national brands.

The 22-inch AC4825 GermGuardian tower unit is manufactured for use in small and medium rooms. It weighs only 7 pounds. The device was certified by Energy Star as it meets all the guidelines set by EPA (the US Environmental Protection Agency).

The AC 4825 model is one of the best selling products on Amazon among the air cleaners. It boasts 4,3 star rating and has almost 8 thousand reviews.


Operation Principle of Germguardian AC4825 3 in 1 Air Cleaning System

The model uses a “3-in-1” purifying system. It means that contamination sources, allergens and viruses are eliminated in three steps.

  1. On the first stage the air goes through the preliminary filter and a charcoal layer. The collectors catch large particles and eliminate odours (such as those caused by smokers).
  2. On the second stage the air is forced through a HEPA filter, which catches small particles such as allergens or dust.
  3. On the third stage the UV light destroys viruses and germs that cause diseases and allergies.

Germ Guardian AC4825 3-in-1 air purification system review


The AC4825 air purifier uses activated charcoal. It absorbs the impurities and makes the environment fresh and clean.

HEPA filtration systems are used in AC4825 when dealing with highly contagious viruses. The only drawback of these collectors is their price. It might be more expensive to replace than the other options.

The device also uses UV-C that is well known for its capability to kill germs. That is why it is widely used to purify water and sterilize medical equipment and instruments. Guardian Technologies company uses UV-C to purify the air. The light doesn’t just kill bacteria, it also decomposes residual germs.


Special Features of AC4825 Germguardian Air Purifier

Low noise level

The AC4825 is completely silent in low-operation mode. That is why it is an ideal option for a bedroom or living room. While high operation mode you may hear its work but it does not disturb.

High CADR rating (Clean Air Delivery Rate)

The AC4825 has 131 CADR for dust, 112 CADR for smoke, and 123 CADR for pollen. The model covers 155 sq. ft. efficiently. It takes as long as 9,5 – 11 minutes to remove dust, allergens and smoke in an isolated room.

Ease of use

The AC4825 is delivered completely equipped and ready to work out-of-the-box. All you should do is just to plug in and turn on the device. It has three power settings which can be adjusted by a handle. The control buttons are placed on the top of the device, thus there is no need to lean on to it. The unit is not heavy (about 8,5 pounds) and is easy to carry around thanks to a built-in handle.

Contemporary design

AC4825 boasts ergonomic and slim design. The tower perfectly matches any premises, whatever it could be – your office, bedroom or living room. Its black matte body with steel inserts will not resonate with any interior design. The LED light on the top adds a unique feature to design.


Maintenance and Operating Costs

The manufacturer recommends replacing the filtering components every 6-9 months. The exact term of service depends on the level of environment contamination and the frequency of device operation. This device has an indicator that alerts about the need to replace collectors as well as UV-C bulb. Therefore there is no need to remember the replacement date. When the red light on the unit top begins to blink – it’s time to replace the collectors. Just remove the back cover, take out a dirty filter and install the new one. New HEPA filter for ac 4825 model costs about 33-35$.

UV-C bulb should also be monitored closely. Its effective term of service is about 10-12 months and the cost is around 30$. Note: it is not recommended to use cheap non-original filters.

Concerning the power efficiency, the AC4825 consumes only 60W per hour.


This air purifier has a 3 year limited warranty. Please keep in mind that it does not apply to the filtration package – HEPA filter and bulb.

How to Use GermGuardian AC4825

You should leave at least one foot behind the unit because the air passage to the cleaning chamber has to be clear at every moment of time. You can make your filter life longer by vacuuming it at least once a month. Please keep in mind that the original HEPA and carbon collectors cannot be washed!


Pros & Cons


  • Great price to quality ratio;
  • Doesn’t require extensive maintenance.


  • The blue UV light can be annoying in a dark room;
  • Plastic smell that needs a couple of days to evaporate after the device has been installed.



The GermGuardian AC4825 is a great solution for efficient air decontamination. It’s reasonably sufficient price, ergonomic design and high performance make it an ideal pick for residential premises and offices.



Germ Guardian AC4825 Air Purifier
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Germ Guardian AC 4825 

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