$84.99 $99.99 Buy It Now

GermGuardian Air Purifier AC4825 Best Choice for Medium Sized Rooms

GermGuardian air purifier is very popular thanks to its affordable price and impact on allergens. Allergies are the most common problem people suffer from.

Allergies are usually caused by allergens which can be eliminated thanks to products built specifically to remove these contaminants from the air.

Having an air purifier in your home can help with this problem. The GermGuardian AC4825, 3-in-1 air cleaning system is one of the most popular air-cleaning systems in the market today.

It is lightweight, packed with various features and most importantly, it is affordable.

GermGuardian AC4825
GermGuardian AC4825
The GermGuardian AC4825 is not as powerful or costly as other air purifiers but does a good job in small to medium-sized rooms.

The Germguardian air purifier AC4825 is perfect for those who have asthma problems or who are sensitive to allergies.

They work simultaneously to bring fresher and cleaner air. It comes with UV light which effectively kills germs and bacteria that may be found in the air.

It is a good fit for small to medium-sized rooms and features three air purifying stages.

This air purifier does a great job. The air is noticeably cleaner around it, and my problem with allergies have decreased because of it. I also really like the UV settings – it makes me happy to know that germs won’t get far in my home…


It will also disperse odor left from cooking, smoking or any other bad smell thanks to its charcoal filter and a pre-filter.

GermGuardina air purifiers use TRUE Hepa filter which is capable of capturing airborne particles down to a size of 0.3 microns. These include spores, dust mites, pollen, dander, and mold…

Germ Guardian is a well-known mass producer of retail products, and its primary goal is on secure, innovative and natural technologies.


What Differs GermGuardian Air Purifier From Competition?

There are few reasons you would buy Germ Guardian AC4825 3 in 1 air purifier. Maybe you want it to help you with allergies.

People who suffer from severe allergies will do almost anything to get relief, and this purifier can give you that. It can remove smog and pollen. Buy this air purifier if you want to remove smoke and odors from home or kitchen.

A lot of people just want to get rid of the particles that trigger asthma symptoms while others want to fight pet allergens and animal odors.

Germguardian AC4825 3-in-1 Air Cleaning System with True Hepa

The Germguardian AC4825 2-in-1 Air Cleaner has a true HEPA filter and multiple layers of filtration to ensure a safe and clean environment for your home. It’s not as powerful or costly as other air purifiers but does a good job in small to medium-sized rooms.

With its unique 3-Stage filtering ability, the Germ Guardian purifier can cover a wide range of air pollutants. I’m going to get technical now, so bear with me.

The first part of the 3-in-1 system is the pre-filter which uses activated carbon to trap larger particles found indoors such as dust, lint, and hair.

Activated charcoal is very porous and its uneven surface is ideal for trapping larger pollutants. A carbon layer efficiently eliminates odors stemming from household pets, cooking and tobacco smoke.

After running this for maybe an hour, the air in the room was incredibly fresher. It doesn’t take much to get the air fresher using this purifier…


During the second stage, the air is filtered through a Germ Guardian True HEPA filter. True HEPA filters have to meet strict standards which involve being able to collect up to 99.97% of airborne particles as tiny as 0.3 microns in diameter.


GermGuardian AC4825 -3-in-1-air-purifier


The third stage involves air filtration using UV-C light. When the air is exposed to short range UV light (UV-C), which is considered to be the germicidal UV light, pathogens such as rhinovirus, E.coli and streptococcus are destroyed.


GermGuardian Air Purifier Capacity and CADR

The GermGuardian AC4825 is suitable for rooms up to 155 square feet of in size which makes it perfect for most bedrooms. It is the best choice for small to medium sized rooms.

The unit’s CADR (Clear Air Delivery Rate) is 100+ which effectively means it’s able to deliver 100 cubic feet of clean air per minute with five changes of air per hour.

GermGuardian 3 in 1 air cleaning system has three fan speed settings available. Those are low, medium and high.

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Last update was on: 25/02/2024 15:40

When set on low, the unit is silent. In fact, most people are not able to tell it is working if it weren’t for the large blue LED light. Air cleaner doesn’t get much louder when the fan speed is set to medium.

Once set on high-speed setting, the unit emits noise that is similar to white noise. But this power level will hardly ever be needed.

As Germguardian is very quite, it can also be activated during the night as well as during the day. You can sleep with no worries knowing that air you breathe in the morning will be cleaner and fresher.

Quiet like a mouse – It was able to pick up a good amount of the particles. The sound is quiet too. Very portable and the design is sleek…


While it’s true that beauty is in the eye of the beholder, this device is an absolute stunner! I think it’s one of the best-looking air purifiers money can buy.

Sleek lines, a black casing and blue LED light make a beautiful combination. It even can easily pass as part of your home entertainment system.

On the top of the unit is a handle and it weighs a mere 10lbs which makes transportation much easier.

  • Overview
  • Description
  • Brand/Store
  • Availability
  • User Rating
  • Review
  • Specification
  • CDR: Tobacco Smoke
  • CDR: Dust
  • CDR: Pollen
  • Area Coverage (sqft)
  • Number of Fan Speeds
  • Ionizer
  • UV Bulb
  • HEPA Filter
  • Pre-Filter
  • Energy Star Verification
  • CARB Certified
  • Power Consumption (Watts)
  • Filter Monitor
  • Standby Mode
  • Auto Mode
  • Air Quality Sensor
  • Timer & Scheduler
  • Remote Control
  • Hepa-filter-type
  • Carbon Filter
  • Dimensions (inches)
  • Weight (lbs)
  • Filters To Change
  • Recommended For
  • Other Options
  • Price
  • Filter Reset
  • Amount of Air Moved (CFM)
  • Noise Level Highest Speed (dB)
  • Noise Level Lowest Speed (dB)
  • Airflow at Highest Speed (CFM)


Ease of Use and Maintenance

GermGuardian air purifier doesn’t require much maintenance. All you need to do is wipe it down with a soft, dry cloth to prevent dust from collecting on the vents.

The filters should be vacuumed once every two weeks on average and replaced every eight months, or every year depending on how often you use the purifier.

With Germguardian you will also receive True HEPA filter which needs to be replaced only once a year. Replacing filter isn’t hard at all, and it can be purchased very cheaply.

GermGuardian AC4825 Features

#1 Charcoal Pre-filter – the activated carbon filter removes and breaks down odor and smoke particles from chemicals, cooking, and cigarettes.

This technology is efficient in removing large particles like dust and lint, the combined pre-filter and charcoal filter eliminates common household odor and destroy germs and bacteria.

#2 UV Technology – uses Ultra-violet light spectrum technology that kills airborne bacteria and germs. UV-C light is proven to sanitize and kill viruses such as rhinovirus, E. coli, and streptococcus as well as mold spores.

#3 True HEPA Filter – GermGuardian air purifier uses True HEPA Filter, which is proven in effective eliminating 99.97% of airborne allergens such as household dust, pet dander, mold spores, plant pollens and particles as small as 0.3 microns in size.

#4 Up to 155 Square Feet Coverage – this air cleaning system covers up to 155 square feet. This area coverage is sufficient for most homes.

#5 Quiet Operation – GermGuardian air purifier AC4825 operates with just a soft hum. You can leave it running anytime of the day, even at night.

#6 Removable Pre-filter – the pre-filter is easily removable. It is recommended to vacuum the front panel of the filter once a month.

#7 Energy Efficient – the Germ Guardian AC4825 purifier is budget friendly as it uses only 55 watts. It helps you save a money on utility bills.

#8 Environment Friendly – No ozone emitted.

GermGuardian AC4825 True HEPA Replacement Filter

GermGuardian AC4800 True HEPA Filter
GermGuardian AC4800 True HEPA Filter
Combination filter includes Pre-filter and True HEPA filter that captures 99.97% of allergens as well as a Charcoal filter that helps reduce household odors.

Additional Features

#Filters last 6 to 8 months – The charcoal pre-filter and HEPA filter both last on average 6 to 8 months before needing a replacement. You can vacuum each filter clean to elongate their life.

#Easy filter replacement – Simply remove the back filter cover, pop out the used filter, and install a fresh one. There are no headaches when replacing the filter.

#Long-lasting UV-C bulb – The UV-C light bulb shines for 10 to 12 months on average.

#Energy Star operation – Energy Star-certified air purifiers like this one are 40% more efficient than standard models.


Germ Guardian Air Purifier FAQ


Do I need to replace my filter?

Yes. It is recommended that you change the Filter (FILTER B/FLT4825) every 6 to 8 months depending on use.


How long is the warranty?

The warranty is a 3-year limited warranty. For more detailed warranty information, please refer to the warranty section of your instruction manual.


What is CADR?

CADR stands for “Clean Air Delivery Rate” which indicates the volume of filtered air delivered by an air purifier.

CADR ratings show the effectiveness of how efficient the air purifier is at capturing fine particles from things like tobacco smoke and plant pollens from the room.


How do I know when I should replace the filter?

It is recommended that you replace the Combination Filter every six months depending on the use to maintain an optimal level of air purification.

When the filter turns from white to dark gray or black, it should be replaced with a new one. If the filter is still white, it does not need to be replaced.


What is UV-C light?

UV-C is part of the ultra-violet light spectrum that is filtered out by the earth’s atmosphere. The “C” stands for the particular frequency of UV light that kills germs.


Why is UV-C light so effective?

UV-C Light is highly effective at penetrating thin-walled germs like viruses and bacteria. The light alters the genetic structure of the germ, and they die.


GermGuardian Air Purifier AC4825 PROS

  • Three levels of filters – this is why GermGuardian AC4825 is called a 3-in-1 air purifier. It uses a charcoal pre-filter with activated carbon, a true HEPA filter that captures 99.7% of airborne particles, and UV-C light to treat germs.
  • Created for those with allergic reactions – this air purifier with its UV technology does an exceptional job of removing common allergens. Many users have had stuffed, blocked noses, various other allergic reactions that have disappeared after using this air purifier for a while
  • Reasonable CADR ratings – 100+ is sufficient for most purposes
  • Energy efficient – uses only 55W, less than that of a lightbulb
  • Affordable – all of the above for approximately $95 makes a sweet deal
Son has respiratory issues, and dust is the enemy. So, we got the germ guardian and it seems to have helped. His coughing has gone down significantly if not all together, snoring has also minimized. He gets a restful sleep, and that is priceless…Buyer


GermGuardian Air Purifier AC4825 CONS

  • Higher settings can be loud – It all depends on from a buyer perspective. What for someone is loud for others can be silent.
  • Coverage area of 155 square feet may not be big enough for large houses – In this case, you could get one air purifier for each room you want to clean air


GermGuardian Air Purifier AC4825 Review Final Words

The Germguardian AC4825 3-in-1 air cleaner has a true HEPA filter and multiple layers of filtration to ensure a safe and clean environment for your home. It’s not as powerful or costly as other air purifiers but does a good job in small to medium-sized rooms.

If you need something for larger rooms, then you should check out Austin Air Healthmate HM 400 or if you need small air cleaner for spaces up to 110 sqft you should check Honeywell Platinum 16200 Air Purifier which is also very cheap.


It seems buyers love that they can check filter performance periodically by examining the color of the HEPA filter. It’s time to change the filter when the color changes from white to gray to black.

GermGuardina slim tower design is another feature why customers are found of it. You can tuck this tower unit in the corner of room to save space while still enjoying the benefits of cleaner air.

This model does not include more advanced features like digital controls, a filter replacement indicator, or a programmable timer. Check out the AC4825’s sister tower air purifiers if you’re interested in these features.

Also, consider upgrading your HEPA filter to the Germ Guardian True HEPA Replacement Filter B PET (FLT4850PT) for added protection against bacteria and germs.

This filter features the Pet Pure Treatment, an antimicrobial agent that inhibits the growth of mold, mildew, and odor-causing bacteria on the surface of the filter.

7.9 Total Score

It's not as powerful or costly as other air purifiers but does a good job in small to medium-sized rooms.

Air Change Per Hour Rating
Clean Air Delivery Rating
Energy Efficient
Remove Allergens
Scent Reduction
Coverage Area
  • Three levels of filtration
  • Good for allergy sufferers
  • Reasonable CADR ratings
  • Energy efficient
  • Affordable price
  • Lightweight and comes with handle
  • Not suitable for larger rooms
  • No filter replacement indicator
  • No programmable timer
  • No remote control
User Rating: 3.67 (3 votes)
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