GermGuardian AC4825 Air Purifier: Trusted Review & Specs

The GermGuardian has anchored Guardian Technologies air purifiers in the low-range market in the USA. The company launched its first classic GermGuardian, the GermGuardian AC5000, and it was received well here. Knowing the potential of the AC5000E device, Guardian Technologies invented a 22-inch version of this successful air purifier and reduce the cost even much lower. Today, we are having a GermGuardian AC4825 Review to check out one of the best and most popular air purifiers in the line of GermGuardian machines.

GermGuardian AC4825 ranks C in our air purifier ranking list

The flagships of this brand are the GermGuardian AC9400W and GermGuardian AC9200WCA. But if you are looking for a Smart air purifier, you should search for either the GermGuardian CDAP5500BCA or GermGuardian CDAP4500BCA.

In Breathe Quality, we have reviewed all air purifiers under these sections. Also, we guarantee that:

  • We do give honest reviews (both pros and cons) so anyone will guarantee to have the wisest choices.
  • We do not (and never) exaggerate one product just to let you click the links and buy that product blindly.


germguardian ac4825 review
  • Good performance for the money with UV-C light and True HEPA filter
  • Best value
  • 3-year warranty
  • Quite noisy at highest setting
  • Lacks of Smart features

Guardian Technologies has already had one big success in last year, selling over a million units of their devices. The U.S company hopes to keep that momentum going with the GermGuardian AC4825, which brings both True HEPA filter and an UV-C light to the budget segment. We try to find out in our GermGuardian AC4825 Review (or GermGuardian AC4825W Review, the white version of GermGuardian AC4825).

Other GermGuardian’s Air Purifier Reviews:

GermGuardian AC4825 Price

As the smaller version of GermGuardian AC5000, GermGuardian AC4825 will bring in a better price tag. You will get an under $100 air purifier with all the benefits a True HEPA air filter could do. For the same price, only Honeywell HPA060, Levoit LV-H132, AeraMax 100 and the PureZone are the most well-known opponents of this GermGuardian AC4825.

GermGuardian AC4825 is available for $99, but if you follow our link below, you will enjoy the discount. There is also a GermGuardian AC4820 with exactly the same machine as our today unit, only without an UV-C light filter. I advise you to stay with this GermGuardian AC4825 for more defense against the viruses and bacteria.

If you are looking for the no-UV light filter version of this GermGuardian AC4825, you should look for the latest GermGuardian AC4200W, which is also more compact than our today unit with only 13.5 inches in height.

Top GermGuardian AC4825 deals right now

GermGuardian AC4825 3-in-1 Air Purifier with HEPA Filter, UVC Sanitizer and Odor Reduction, 22-Inch Tower.

Using the same air filtration process as GermGuardian AC5000, GermGuardian AC4825 has reduced $10 in price tag. Also, here is a 25% OFF for a limited time. Grab it now.

Related post: Best air purifier 2022.

GermGuardian AC4825 Design and Size

Notice that you can have the White version of this air purifier, under the name of GermGuardian AC4825W. Our testing model is a Black version, but due to the Guardian Technologies’s manual, both air purifiers serve the same specifications. So if you are looking for a GermGuardian AC4825W Review, you can also read our today review.

germguardian ac4825 review

One of the first things you notice when you have GermGuardian AC4825 in your home is that despite the 22-inch in height, the design of this air purifier is overall the same with the bigger brother, GermGuardian AC5000.

Follow this design language, this 22-inch air purifier is ready with an air output grill from the front and an intake grill from the back. This classic air flow is the unique feature of GermGuardian air purifier, to increase the efficiency of its fan.

Also, at the top of GermGuardian AC4825, you will find a twin control panel with AC5000E, with only one UV-light button, one on/off button, one fan speed switch and a LED filter replacement indicator.

germguardian ac4825 review

Source: Amazon

At roughly 7 lbs, GermGuardian AC4825 air purifier is even lighter than the CDAP4500BCA which weighs 9.45 lbs. With a relatively small size, GermGuardian AC4825 is compact and therefore easy to bring anywhere in your home.

Related post: Best air purifiers for bedroom.

GermGuardian AC4825 Filters

GermGuardian AC4825 features a 3-in-1 air cleaning system with these air filters as below:

  1. Pre-filter – Combining with the Activated Carbon filter, this layer of air filter can remove most of the large particles of pollutants and reduce odors created from smoke, cooking, and pets.
  2. True HEPA filter – GermGuardian AC4825E makes use of a True HEPA Filter to capture 99.97% of microscopic allergens, dust and mold spores down to 0.3 microns in size.
  3. UV-C Light – With an UV-C light bulb, GermGuardian AC4825E can kill airborne bacteria, viruses and mold spores.

GermGuardian AC4825 is powered by a same True HEPA filter from Guardian Technologies brand, the FLT 4825 filter-B HEPA to help capture the tiniest contaminant particles as small as 0.3 microns including of dust, dust mites, pollen, pet hair, pet dander and any other allergens. Just like the bigger version – GermGuardian AC5000, GermGuardian AC4825 also has one pre-filter with Activated Carbon layer attached to reduce the smoke and odors. Apart from these typical filter layers, GermGuardian AC4825 supports an UV-C light bulb to enhance the power of killing mold and viruses.

To test the performance of this GermGuardian AC4825, I put it in a comparison with Honeywell HPA020B and Levoit Vista 200. They are all in the same test conditions, a room of 100 square feet and duration of 1 hour. With double the standard room size, Honeywell HPA020B fell to only 99.7%, while the GermGuardian AC4825 was still 99.9% for capturing as small as 0.3 microns particles. The Levoit Vista 200 also had the lower performance, with only 99.7%.

germguardian ac4825 review

As usual, you need to change the air filter every 6-8 months base on 24/7 use. Thanks to the smaller size, the filter-B HEPA is also lower cost than the common filter-C of GermGuardian 28-inch air purifiers.

Related post: Best air purifiers for allergies.

GermGuardian AC4825 Room Coverage

GermGuardian AC4825 can cover effectively a room size of 167 square feet. This is the same room coverage as the small air purifiers like GermGuardian CDAP4500BCA and even the taller CDAP5500BCA.

The ACH of GermGuardian AC4825 is 4X, which is also the same with every device from this brand.

The CADR of GermGuardian AC4825 is 118 Dust/ 108 Smoke/ 125 pollen (cfm). Despite of featuring an older air filtration process, the CADR rating of this air purifier is even better than the latest portable device of Guardian Technologies – CDAP4500BCA.

Related post: Best large room air purifiers.

GermGuardian AC4825 Sound

Using a same 3 fan speeds like its bigger brother, GermGuardian AC4825’s noise level is better than the modern devices which commonly comes with 5 fan speeds. A smaller size also helps reduce the fan size, and as a result, reduce the noise, but only on highest fan speed.

At the lowest setting, the noise level of GermGuardian AC4825 is still 40 decibels, which is higher than most of the normal air purifiers in the market. For example, the AeraMax 300 is only 35 decibels, the SilverOnyx can be as low as 25 decibels, or the Winix 5300-2 with only 28 decibels.

But when you switch to the highest setting, the noise level of GermGuardian AC4825 is only 55 decibels (db), which is lower than the common 60 db of GermGuardian AC5000 or GermGuardian AC5350B. This is still near the noise level of the public restaurant, or an air conditioning unit at 100 feet. But still, better is better.

However, the noise level of this air purifier didn’t fare too well in quiet places, you will still notice a clear sound, especially when running at the highest setting. That’s why, we believe that GermGuardian AC4825 is still not suitable for your office or bedroom.

Related post: Best air purifiers for baby.

GermGuardian AC4825 Power Consumption

To be one of the best air purifiers, one device must strictly pass our Breathe Quality test after a long time use. Also, one of the most asked questions in Breathe Quality is: “Do air purifiers use a lot of energy?”. We can all agree that power consumption is one important criteria to review if this air purifier is worth your money or not.

Using a 5 watts UV-C bulb, GermGuardian AC4825’s power consumption is 53 watts. It is still higher than many other energy-saving air purifiers in the market, like the Blue Pure 411, Levoit LV-H132, SilverOnyx or AeraMax 100. However, this is an Energy Star air purifier, because it has very small CADR/watt rate.

For using a GermGuardian AC4825 8 hours per day, it would cost you up to $19 per year.

Related post: Best air purifiers for pets.

GermGuardian AC4825 Additional Features

GermGuardian AC4825 is in fact a smaller GermGuardian AC5000, so just like its brother, this air purifier doesn’t bring any additional features except a LED notification for filter replacement. One again, we must remind you that this air purifier is superseded by the latest CDAP4500BCA long ago, so you should not expect much for an under $100 air purifier.

Related posts:

1, Best air purifiers for smoke.

2, Best air purifiers for dust.

3, Best air purifiers for mold.

GermGuardian AC4825 Customer Service

There is not much to say about the brilliant support from Guardian Technologies’s customer service. The American brand is providing a very active support for anyone contacting them. They also put the Instruction Manuals online to help you solve the common questions by yourself. But if you can’t find a solution, just contact the customer service via phone at 866-603-5900 or via email at Just like any other brands, they will be available for you from Monday to Friday.

They have occasional Free Shipping policy, as well as a great discount on all products (most popular 10% to 20%). Whenever you find their air purifiers not as great as you previously thought, you can return them within 30 days of your original receipt of the order. And don’t worry about the warranty policy of Guardian Technologies, as they warrant their products to be free of defects in materials or workmanship. You can register for a warranty in up to 3 years for the small devices, and up to 5 years for others.

For the GermGuardian AC4825, GermGuardian AC4900CA, GermGuardian AC4300BPTCA and GermGuardian CDAP4500BCA, you will have a 3-year warranty.

Top GermGuardian AC4825 deals right now

GermGuardian AC4825 3-in-1 Air Purifier with HEPA Filter, UVC Sanitizer and Odor Reduction, 22-Inch Tower.

Using the same air filtration process as GermGuardian AC5000, GermGuardian AC4825 has reduced $10 in price tag. Also, here is a 25% OFF for a limited time. Grab it now.

Our verdict

GermGuardian AC4825 is a good-to-go air purifier with a classic 3-in-1 air cleaning system of Guardian Technologies. This air purifier has small size with only 7 lbs in weight, but its power is enough to keep you healthy in a same room size a double-its-price air purifier could do. Together with GermGuardian AC5250PT, the GermGuardian AC4825 is the strategical ace of this brand in low-range market.

  • Performance
  • Features
  • Annual Cost
  • Design
  • Price


A 22-inch sidekick of the GermGuardian AC5000, and this is one of the most affordable True HEPA air purifiers at the moment. GermGuardian AC4825 is the Amazon’s Choice for air purifiers over the years.