germguardian ac4825 smallThe GermGuardian AC4825, 3-in-1 Air Cleaning System with True HEPA, UV-C and Odor Reduction is an air purifier with several layers of air filtration. It is a low power device and very simple to operate. It is not a ‘classic’ vacuum cleaner, but it ‘vacuums in’ air and cleanses it from pollutants like pet dander, household dust, mold spores, plant pollen, etc.

So, it is a ‘vacuum cleaner’, by default! 🙂

GermGuardian AC4825 3-in-1 Air Cleaning System Review

germguardian ac4825 medium

People suffering from asthma and allergies are extra sensitive regarding air quality in the room they spend most of the time. Air purifiers like the GermGuardian AC4825 are a welcome addition in your quest for improving your quality of life.

Keep in mind that asthma and allergies are serious problems that warrant extensive lifestyle changes. If dust, pet dander, pollen, mites, and other triggers make your indoor living a nuisance, you should consider upgrading your home with other equally efficient cleaning tools. For this reason, you should also think about getting one of the best vacuum cleaners for asthma and allergies.

GermGuardian AC4825 3-in-1 Air Cleaning System Tech Specs and Features

Let’s see the most prominent tech specs and features of the GermGuardian AC4825 3-in-1 Air Cleaning System as provided by the manufacturer.

  • It features a true HEPA air filter that is able to reduce up to 99.97% of harmful germs, dust, pollen, pet dander, mold spores, and other allergens as small as .3 microns;
  • The ability to filter tobacco smoke, dust, and pollen comes with an Energy Star Certification and CARB compliance;
  • The UV C light kills airborne viruses such as influenza, staph, or rhinovirus;
  • The air filter works with Titanium Dioxide to reduce volatile organic compounds;
  • Keep in mind that the pre-filter of this system traps dust, pet hair, and other large particles while extending the life of the HEPA filter;
  • This system also comes with an activated charcoal filter that reduces the unpleasant odors coming from pets, smoke, cooking fumes, and other sources;
  • One of the best features of this air purifier is its quiet operation; you can use its lowest setting (generating a gentle white noise) during the night; in this way, you can get restful and undisturbed sleep;
  • The air purifier allows you to choose between 3-speed settings and an optional UV C light for germ purification;
  • The manufacturer recommends you to replace the filter every 6 to 8 months and the UV C bulb every 10 to 12 months;
  • Warranty: 3-year limited warranty and U.S.-based tech support.

How Does the GermGuardian AC4825 3-in-1 Air Cleaning System Work?

The GermGuardian AC4825 air purifier is a modern-looking device that resembles a small tower, 22 inches (~56 cm) tall. It can blend in most rooms and offices and silently do its job – clean the air. It operates using mains power – 110/120V, 60 Hz. If you are not from the US, be sure to order a model that can use local electricity.

One of the most important aspects of air purifiers is air filtration – GermGuardian AC4825 filters the air in three stages:

First stage

In this stage, the mechanical pre-filter mixed with the charcoal filter capture larger particles like dust and lint. Their main purpose and effect are the removal of common household odors, including pet odors, cooking odors, smoke, and others. This stage protects the rest of the filtration system from larger particles and chemicals and increases filter life.

Second stage

This second stage is based on a ‘True HEPA filter‘ which captures 99.97% of pollutants 0.3 microns in size or larger. In case you did not know, these particles include mold spores, dust mites, plant pollen, pet dander, larger smoke particles, etc.

Some manufacturers claim that their filters are, for example, 98% HEPA or similar. That is a marketing trick. If it is HEPA, then that filter stops 99.97% of 0.3 micrometers or larger particles. Make sure you know these details when you look at vacuum cleaners’ specifications as well.

If you want to learn more about how vacuum cleaners work, what HEPA filters do, and how to pick the best air purification systems or cleaning solutions for your home or business, do not hesitate to check out our guides, reviews, and detailed explanations!

Third and final filtration stage

This final stage of protection is based on the UV-C light, which kills (actually, it damages the DNA of viruses and bacteria so they will die eventually, sometimes not right away) airborne viruses and bacteria while activating titanium dioxide (TiO2) to help decompose odor molecules caused by smoking, cooking, pets, etc.

The light-bulb used in the AC4825 emits ultraviolet light at 253.7 nm. The GermGuardian AC4825 doesn’t emit ozone in the room (it would require ultraviolet light of 200 nm or shorter to produce ozone).

germguardian ac4825 controllsTo simplify use, GermGuardian AC4825 is equipped with indicator lights for the UV-C bulb and filter. When the onboard controller detects that it is time to replace the bulb or filter, it will notify the user.

When turned on for the first time, it is possible for the indicator lights to start blinking. When that happens, simply reset the system by holding the UV button for 3-5 seconds or until the reminder lights stop flashing. After that, the air purifier is set and ready to operate.

Why Should You Buy the GermGuardian AC4825 3-in-1 Air Cleaning System?

The GermGuardian AC4825 is ‘CADR rated 100+’ (CADR stands for ‘Clean Air Delivery Rate’ and is measured in cubic feet per minute (CFM)). Being rated CADR 100+, GermGuardian AC4825 is suitable for smaller rooms and areas, up to 150 square feet.

The GermGuardian air purifier is capable of killing bacteria and viruses, filter odors, and trap allergens. The true HEPA filter and the optional UV-C light, you are sure you will enjoy crisp, refreshing air in your home.

The AHAM certification is a plus. Independent laboratories check air cleaners’ packaging claims about energy, volume, and performance criteria. Recognized by the EPA, AHAM is an administrative body approved to administer testing for the ENERGY STAR program. In other words, the GermGuardian does not only save energy and money in the long run, but it does also deliver the results it promises.


If you regularly vacuum your room with HEPA grade vacuum cleaners against allergies and the number of air particles is not high, air purifiers like this can be used even in larger rooms. If you do have a larger room, you will require at least two of these purifiers or consider buying a larger model. The GermGuardian AC4825 does a terrific job at cleaning the air and creating a safe, fresh environment indoors. Among the pros of this product, we can count the following: excellent price/value ratio, outstanding air cleaning performances, good warranty, the presence of UV light filter, and reliable customer support, among others. As you can see from the users’ reviews, this air purifier is one of the best money can buy.

GermGuardian AC4825 Air Filter System FAQs

Let’s wrap up this GermGuardian AC4825 Air Filter review by answering some of the most frequently asked questions about this product!

How long do GermGuardian AC4825 filters last?

According to the manufacturer, the GermGuardian AC4825 filters last up to 10 to 12 months. However, if you notice a change in the air quality, you can replace the filters after 8 months of use. Keep in mind to use only OEM filters or replacement models recommended by the manufacturer.

Is GermGuardian AC4825 worth it?

With its true HEPA filters and UV light filtration technology, this is one of the best air purifiers for bedrooms and living rooms.

Should you leave your air purifier on at all times?

If you or your family members suffer from asthma or allergies, you should leave the air purifier on at all times. Many people are concerned with energy consumption and bills, but air purifiers usually do not burn your pockets in this regard. Moreover, Energy Star products, like the GermGuardian AC4825 is energy-efficient, allowing you to use it for long periods without making significant changes to your energy consumption average.