In recent years, clean air has become increasingly difficult to achieve. Despite the rise in air pollution throughout the world, air purifiers have kept in step and rapidly evolved to address the different problems that such pollution creates.

One of the most popular technologies used in air purifiers, in combination with filtration and ionization, is ultraviolet light.

Ultraviolet light has long been used as an antimicrobial treatment and helps to kill bacteria, viruses, yeasts, and molds in the air. Air purifiers use UV-C light, which has a short wavelength of about 254 nanometers. At this wavelength, ultraviolet light is considered germicidal. It works by penetrating thin-walled germs like viruses and bacteria and fatally altering their genetic structure.

As a result, air purifiers employing UV-C light will significantly benefit people with allergies, asthma, and weakened immune systems, providing them with added protection against germs at home.

In this article, we’ll be exploring the 6 best air purifiers which use UV-C light treatment. Read on to find out what makes them stand out from all the other air purifiers on the market.

  • 5-Stage Air Purification System
  • Optional Ionizer
  • Optional UV
  • Air Quality Indicator
  • 1-Year Warranty

  • Ultra-Quiet Operation
  • UV-C Technology
  • 3 Fan Speeds
  • 3-Stage Air Purification System
  • 3-year Warranty

  • 400 Sq Ft Coverage
  • Extended Life filter with 2 Spares
  • HEPA Filter
  • Filter Change Indicator
  • 10-Year Warranty

  • 4-Stage Air Purification System
  • Filter Change Indicator
  • Sleep Mode
  • 4 Fan Speeds
  • 3-Year Warranty

  • 5 in 1 Purifier
  • Coverage of 500 Sq Ft
  • Over 3 Years Lifespan of the UV lamp
  • True HEPA Filter
  • 3-Years Warranty

  • 4 in 1 Air Purification
  • Smart Air Quality Monitor
  • 3-Speed Fan
  • Filter Change Indicator
  • 5-Year Warranty


The SilverOnyx 5-Speed Large Room Air Purifier is our first contender for this list, and also our pick for the best allround air purifier with UV light. It’s compact, and lightweight, yet it’s also one of the most powerful air purifiers to feature with an impressive room coverage of up to 500 sq. ft.

Aside from its superior room coverage, one of the best things about the SilverOnyx is that it has a comprehensive 5-stage air purification system which consists of a pre-filter, True HEPA filter, carbon filter, ionizer, and UV-C light treatment. This allows the SilverOnyx to target a wide array of air pollutants, from allergens and odors to bacteria and viruses.

What’s even better is that the SilverOnyx also has several smart features to choose from to make your experience even better. It has an air quality and filter change indicator, auto, as well as sleep modes, a programmable timer, and 5 fan speeds from which to choose. On auto mode, this air purifier adjusts the fan speed automatically depending on the air quality in the room so that you can set it and forget it.

For all its features and room coverage, the SilverOnyx’s airflow rate and CADR ratings pale in comparison to the other air purifiers on this list. Rated with an airflow rate of no more than 85 cfm, the SilveryOnyx will need more time to clean the room.

Also, it has a very short warranty period which may worry some people. Overall, though, we believe the pros far outweigh the cons for the SilverOnyx.

The SilverOnyx air purifier provides a comprehensive air purification system to handle all sorts of pollutants and has an array of features that make using it even more convenient and easy. And all for a great price!

Pros

  • Extensive room coverage
  • Affordable (upfront and long-term)
  • Small, lightweight
  • Quiet
  • Energy efficient
  • Sleek design
  • Several smart features including auto mode and an air quality indicator

Cons

  • Low CADR and airflow
  • Short warranty


The GermGuardian AC4825 is undoubtedly the most popular UV-C air purifier, a fact testified to by the thousands of reviews it has garnered on Amazon. This tower-type air purifier from Guardian Technologies provides you with an effective 3-stage air purification system with UV-C light treatment for a very affordable price.

Retailing at less than $90, the AC4825 is a crowd favorite, especially for those on a tight budget. It’s also the reason why we have chosen this purifier as our budget pick. Its 3-stage air purification system begins with a carbon pre-filter for removing light household odors, a True HEPA filter to remove allergens, and a UV-C light bulb to zap those disease-causing bacteria and viruses.

Depending on your needs, the AC4825 has 3 fan speeds to choose from, and for its price, the AC4825 has surprisingly good CADR ratings and airflow rates on all 3 fan speeds.

It’s also Energy Star rated so that you know it’s energy efficient. It runs on Ultra-Quiet Operation, too, so you can leave it on for long periods without worrying about it being too disruptive or energy-consuming.

Unfortunately, the AC4825 is limited by its room coverage: rated to cover a mere 155 sq. ft, it is capable of cleaning the air only in small rooms. Also, it lacks several smart features that other UV air purifiers on this list have; it doesn’t have a filter change indicator or timer, which makes the AC4825 a lot less convenient to use. Its replacement filters are also quite expensive, with yearly costs almost equating to a brand new AC4825!

In terms of performance, however, the AC4825 will not let you down. As long as you use it in a small room, it’ll scrub the air clean of allergens, odors, and bacteria with ease and without breaking the bank.

Pros

  • Affordable (upfront)
  • Sleek and lightweight
  • Quiet
  • Energy efficient
  • Good CADR and airflow rate for the price

Cons

  • Fewer features
  • No air quality indicator and smart modes
  • Slightly expensive filter replacements
  • Small room coverage

This Oransi Finn purifier is sleek in design, and ultra-quiet. The noise levels range from 40 dB in the lowest fan speed setting, rising to 60 dB when the fan is on the highest setting. That’s the same level as listening to an air conditioning unit from a distance of 100 ft.

It has a room coverage of 400 sq ft, which is about the size of a 20’ x 20’ room, and it is fitted with a filter indicator that alerts you when the filter needs changing. And speaking of filters, don’t expect that it needs replacing every couple of months; this model has a HEPA filter with a 2-3-year lifespan.

It is also supplied with 2 spare pre-filters for free, meaning that you won’t have to worry about replacing them for a good while yet.

This unit is economical too, drawing a mere 55 watts, so it’s kind to the environment and your wallet.

It has an airflow of 140, which is speed 3 on the CADR, and the company are so certain that you will love this purifier, they give you a 10-year warranty to back up their confidence in their product. Given that most purifiers offer a 3 to 5-year warranty, that has to make this an industry best!

Pros

  • 10-year warranty
  • Long life filters + 2 spares
  • UV light
  • 400 sq ft coverage
  • Electronic controls and LED display

Cons

  • UV creates a smell
  • Feels cheaply constructed
  • Fastest fan setting is noisy

The InvisiClean Aura Air Purifier is another lightweight console air purifier that comes with a very modest price tag. It uses an effective 4-stage air purification system that starts with a carbon pre-filter to remove large debris and odors. That’s followed by a True HEPA filter capable of removing up to 99.97% of pollutants as small as 0.3 microns. Finally, you have an optional ionizer for added efficiency against airborne contaminants and a powerful UV-C light treatment to kill disease- and odor-causing bacteria and viruses.

The Aura has a robust air purification system to tackle all types of air pollutants. However, aside from its cleaning power, the Aura also has significant room coverage of 300 sq. ft, which is a big advantage considering how affordable it is.

It also has a pretty decent CADR rating and airflow rate. In addition, it has several helpful features like a filter change indicator, preset timer, and sleep mode. All these features, while not critical to the performance of an air purifier, make its use and maintenance a lot more convenient.

Despite these perks, the Aura still lacks other features that might have made it an even better air purifier. For example, it doesn’t have an air quality indicator or an auto mode like the SilverOnyx.

Also, its replacement filters are a little pricey. Customers have also complained that the Aura makes a considerable amount of noise, even on the lowest setting, which may be a problem for those who want to use it at night.

Overall, though, the Aura is a pretty solid contender as it offers considerable room coverage, a thorough air purification system, sleek design, and is packed with features at a very reasonable price.

Pros

  • Affordable (upfront)
  • Large room coverage
  • Energy efficient
  • Small and lightweight
  • Sleek design
  • Good CADR and airflow rate for the price

Cons

  • Slightly expensive filter replacements
  • No air quality indicator and smart modes
  • Somewhat loud

This Surround Air Multi-Tech is a 5 in 1 air purifier; it has a pre-filter, a true HEPA filter, a UV light, an activated carbon filter, and a photocatalytic filter.

The UV light feature fights allergens and bacteria that cause illnesses like TB, and under tests, in a 3072 cubic-foot chamber, it was shown to reduce bacteria by up to 80 percent.

It has a handy filter change indicator for added convenience, and to take the guesswork out of replacement, and the UV lamp is good for over 3 years worth of continuous use.

On the lowest fan setting, the Multi-Tech has a noise level of 30 dB, rising to 50 dB when on the highest setting; the equivalent of a hushed conversation. The coverage is impressive too, at over 500 sq ft, making this one of the most powerful purifiers on the list.

Like the Oransi, this purifier draws a meager 55 watts, which is good for the planet and the pocket, and because the UV light operates on a germicidal wavelength, it is recommended by the Center for Disease Control and the Air Institute of Respiratory Education.

Despite the impressive purifying qualities this machine offers, it doesn’t have a night setting to reduce the glare of the LED display, which might disturb your sleep. Many have complained that it is unsuitable for bedrooms and nurseries, especially if you are light-sensitive and require a dark environment to get a good night’s sleep.

Pros

  • CDC recommended
  • LED display
  • 500 sq ft coverage
  • 5 in 1 purification system
  • UV light lasts over 3 years
  • Economical

Cons

  • LED too bright at night

This Pure Zone Elite is a 4 in 1 purifier, with an activated carbon pre-filter, a true HEPA filter, a UV-C light, and an ionizer.

It has a smart air quality monitor which detects particles in the atmosphere and reports the results as color-coded lights on the display. Blue is good air quality, amber (or orange) is fair, and red means the air quality is poor. It then automatically adjusts the fan speed to improve the quality of the air.

As air purifiers go, this is the ultimate in set and forget!

This Pure Zone has a CADR and airflow of 120 cfm, and it has a coverage of 190 sq ft, which isn’t the most significant room coverage on the list, but should still cleanse the air in an average size bedroom or office.

The intuitive control panel allows you to set the timer for 2, 4, and 6 hours, and it has a filter reset indicator to make life that much easier when it’s time to replace the filter.

This unit is economical, drawing a mere 46 watts of power, and this purifier also has an impressive 5-year warranty, giving you the peace of mind that you should get years of trouble-free use without fretting about it not working.

On the downside, this purifier is a little noisy, making it unsuitable for the bedroom or nursery. That said, if you can handle a little “White noise” you should still consider this purifier, especially if you have a small space like an office, that needs clean air.

Pros

  • Air quality monitor
  • 4 in 1 purifier
  • True HEPA filter
  • 190 sq ft coverage
  • Super-economical

Cons

  • Noisy on the highest setting
  • Ineffective against cooking smells

Comparison Chart

FEATURESSilverOnyx 5-Speed Large Room Air Purifier GermGuardian AC4825 Oransi Finn UV Air PurifierInvisiClean Air Aura Air PurifierSurround Air Multi-Tech 8400Pure Enrichment Pure Zone Elite
TypeCompact, Plug-InTower, Plug-InTower, Plug-InConsole, Plug-InConsole, Plug-InTower, Plug-In
Size8.5 x 8.5 x 13.27 x 10.2 x 21.512.8 x 8.8 x 2412.34 x 6.25 x 17.75 16.1 x 6.4 x 12.811.2 x 9.8 x 27
Weight4 lbs7 lbs10 lbs8.9 lbs9.25 lbs11.7 lbs
Filters/
Technology
Pre + HEPA + Carbon + UV + IonizerCarbon Pre + HEPA + UVCarbon Pre + HEPA + UVCarbon Pre + HEPA + Ionizer + UVPre + Carbon + HEPA + Photocatalytic + UVCarbon Pre +True HEPA + UV-C + Ionizer
Room Coverage 500 sq. ft. 155 sq. ft.400 sq. ft. 300 Sq. ft. 500 sq. ft. 190 sq. ft
CADR Ratings/ Airflow Dust – 85

Pollen – 85

Smoke – 85

Dust – 131

Pollen – 123

Smoke – 112

Dust – 140
Pollen – 140
Smoke – 140
Dust – 170

Pollen – 170

Smoke – 170

Airflow – 135 CFMDust – 120

Pollen – 120

Smoke – 120

Quick Navigation

Buyers Guide


What are UV air purifiers?

A UV air purifier is an air purifier that makes use of a UV light bulb as part of their air purification process. UV air purifiers specifically use UV-C light because of its germicidal effects.

Numerous studies have shown that UV-C light can inactivate viruses, bacteria, mold, mildew, and fungi by breaking down their DNA. Thanks to this technology, UV air purifiers have become more adept at removing biological air pollutants than regular air purifiers to create an even more sanitary environment at home.

What factors compromise the effectiveness of UV air purifiers?

One of the biggest disadvantages to using UV light in air purifiers is that there are a lot of factors that can affect its performance. These elements can include:

  • Exposure Time The effectiveness of a UV light in an air purifier is dependent on the length of time pollutants are exposed to the light. Unfortunately, it takes some time for the UV light to do its job. Although a fast airflow rate is desirable in most air purifiers, that is not always the case with UV air purifiers. Ideally, once the air reaches the UV light treatment chamber, airflow should slow down significantly to allow the UV light to eliminate the biological pollutants effectively.
  • Intensity of UV Light  – The strength of the UV light used in air purifiers is also critical to its performance, because a light that is too weak may not be able to combat bacteria and viruses fully.
  • Proximity of Pollutants – For UV light to effectively eliminate biological pollutants, they need to be near to it. Contaminants that are too far away from the light may not be inactivated and thus can be released back into the room.
  • Air Changes – The number of air changes per hour, or ACH, is the number of times the air in a given space gets circulated through the air purifier. The more air changes it can do, the more effective the UV air purifier will be.

Who would benefit from UV air purifiers?

Because UV air purifiers can eliminate allergens, bacteria, and viruses, they can be very beneficial to people who suffer from allergies, asthma or have weakened immune systems that are caused by certain diseases. UV air purifiers are also useful for homes with children and elderly occupants since they can create healthier, more sanitary environments by preventing the spread of disease-causing bacteria.

What are the advantages of using UV air purifiers?

  • Reduced Allergic Reactions – Since UV light is so adept at eliminating allergens such as pet dander and mold, people who suffer from allergies might notice that they have less allergic reactions when they have a UV air purifier running at home.
  • Reduced Risk of Mold Infestation Mold spores can trigger allergies and, when these spores accumulate in your home, you can end up with a mold infestation. UV air purifiers can prevent this by effectively eliminating mold spores from collecting.
  • Reduced Risk of Illness – Viruses and bacteria circulate throughout our air and are often the causes of common diseases like cough, colds, and flu. Having a UV light air purifier at home can effectively reduce the number of viruses and bacteria and thereby lower the risk of illnesses.
  • Reduced Odors – UV air purifiers do an excellent job of targeting odor-causing bacteria at home. A UV air purifier can eliminate these bacteria and improve the overall smell of your home, leaving you with fresher air to breathe.

What are the disadvantages of using UV air purifiers?

As previously mentioned, several factors can affect the performance of a UV air purifier. If these elements are not addressed, it may render the UV light treatment completely ineffective at eliminating biological pollutants. That’s why it’s crucial to consider all these factors before purchasing a UV air purifier.

Also, UV air purifiers have several additional factors to consider that may be disadvantages for some users. These include:

  • Filters Boost Effectiveness – UV light is excellent at killing harmful bacteria and viruses, but it won’t remove them. That’s why the best UV air purifiers make use of filters like True HEPA filters and carbon filters to trap these pollutants and prevent them from being released back into the room.
  • Bulb Replacements – In addition to periodic filter replacements, UV-C light bulbs will need to be replaced every 12 to 24 months depending on the air purifier brand and model. It’s always best to follow the manufacturer’s instructions when replacing the UV-C light bulb to ensure that your UV air purifier is in tip-top shape.
  • Production of Ozone – The UV technology used by some air purifier models may produce potentially high amounts of ozone while in use. Ozone is a lung irritant and can be harmful when inhaled in high concentrations. Unfortunately, most manufacturers fail to mention this so it’s worth asking the question.
  • Technology Tricks – Concerning the previous point, manufacturers often don’t explain what UV light technology they use and how it works. Because of this, people may not be fully aware of what they’re getting into when purchasing a UV air purifier.
PROSCONS
UV Air Filters
  • Reduce allergies
  • Reduce the risk of mold
  • Healthier air
  • Banishes odors
  • Replacement bulbs are expensive
  • Produces ozone
  • Need filters to remove bacteria effectively
  • Confusing technology

FAQ

What is UV light?

Ultraviolet (UV) light is a type of electromagnetic light that is all around us but is not visible to the human eye. It has a wavelength of about 10 nm to 400 nm which is shorter than that of visible light, but longer than X-rays. UV light is present in sunlight and is responsible for causing suntans,  sunburns, and a higher risk of cancer.

Although too much UV light can be harmful, it is also beneficial for us in that it is responsible for the formation of bone-strengthening vitamin D. UV light also has many valuable uses in photography, electronics, forensics, chemistry, and the medical field to name a few.

What are the types of UV light?

There are three types of UV light, each of which is defined by their wavelengths:

  • UV-A – UV-A rays have the longest wavelengths, ranging from 315-400 nm
  • UV-B – UV-B rays fall in the middle with wavelengths ranging from 280-315 nm
  • UV-C – UV-C rays have the shortest wavelengths ranging from 100-280 nm

UVA rays and UVB rays can damage skin and potentially cause skin cancer, while UV-C rays are not known to create any skin disease. Instead, UV-C rays are considered germicidal and are commonly used to disinfect and sterilize.

What is CADR?

CADR, or Clean Air Delivery Rate to give it its full title, is a way of measuring the effectiveness of your air purifier. It was developed by the Association of Home Appliance Manufacturers |(AHAM) to give retailers, customers, and government bodies a standardized rating system.

The ratings are usually broken into three categories; dust, pollen, and smoke, and the higher the rating, the more effective the purifier is.

Final Thoughts

Air purifiers these days have become increasingly complex, especially with the features and technologies they employ. While not new to the air purifier industry, the use of UV-C technology in air purifiers has proven very effective in fighting off disease, as well as odor-causing bacteria and viruses that cannot be removed by filters alone.

UV air purifiers, in general, are much more adept than regular air purifiers in providing you with a healthier, more sanitary home environment.

As a stand alone method of purifying the air, UV light isn’t the most effective, but as we’ve shown, if it’s used as part of a package of measures that includes pre-filters, activated carbon filters, and True HEPA filters, UV technology adds an extra element to thoroughly clean the air in your home.

 

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