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Air Ionizer Dangers: Are Ionic Air Purifiers Safe?

Air ionizers are designed to help provide cleaner air and they do this by utilizing ionized particles. But a lot of questions tend to come with the use of air ionizers, one of the most common being…Are air ionizers dangerous?

The Short Answer: It depends on who you ask. Some critics believe that air ionizers give off dangerous levels of ozone which is not only harmful to the environment, but can be equally as hazardous to your health.

air ionizer dangers - air quality
Ozone exists in 2 levels of the atmosphere: in the stratosphere (good – protects us from the sun’s rays) and at the ground level (bad – toxic when breathed in)

When inhaled in high enough doses, ozone can have harmful effects– including damage to your lungs, chest pain, coughing, or shortness of breath.

Because of this concern, federally-mandated standards restrict the amount of ozone any air purifier can give off. These restrictions help to ensure that any potential ozone exposure remains at a safe level.

Air ionizers vs. Ionic air purifiers

First things first, let’s get our names straight. In the air purifier market, there are air ionizers and there are ionic air purifiers.

Rabbit Air Purifier Filters
The Rabbit Air MinusA2 uses 5 different filters and an ionizer as the last purification stage

What’s the difference?

Basically nothing.

These are two different ways to talk about the same technology, electrically charged molecules being used to help purify the air. In this guide, we’ll be calling them air ionizers– so let’s continue.

How do air ionizers work?

A typical air purifier would use fans or filters to help remove contaminants and purify the air. In the case of air ionizers, they rely on the use of electrically charged air molecules, or ions, to do the same job.

RELATED – See our full list of air purifier reviews.

Every room is filled with positively charged particles, which could be made up of dust, microbes, odors, airborne bacteria or illnesses, smoke or other allergens.

The job of an air ionizer is to release negatively charged particles that are then attracted and bond to the positively charged particles in the room.

how air ionizers work

When the ionized particles bond to the airborne particles, the joint union is then too heavy to float in the air and they fall to the ground. Once they’re no longer airborne, these particles can be vacuumed up, or dusted off of furniture and raised surfaces.

What are the benefits of air ionizers?

Negative ions produce a number of benefits in our natural environment.

Think of some of your favorite places. Maybe it’s the ocean, a serene waterfall or out in nature’s greenery.

Ionic particles produced by waterfalls

This short list here includes some of the natural environments with the highest levels of detected negative ions present

Air ionizers and their connection to negative ions can mean big benefits to your respiratory system and overall health. The use of negative ions in the air can have the following results:

  • Improved air quality through the removal of dust, allergens, pollen, pet dander, mold spores and other airborne bacteria.
  • Decreased exposure to airborne respiratory bacteria like colds, flu, and asthmatic triggers
  • Improved sleep and overall mood, according to a 2012 Italian study that looked at the evidence base for the benefits of negative ions in improving mood and treating mood disorders
  • Relief from seasonal or chronic depression— according to a study from Columbia University, negative ions can have as much of an effect as prescribed antidepressants

All this sound too good to be true?

Some people would say yes. Let’s talk about the potential negative side of negative ions.

What are the dangers of air ionizers?

So naturally occurring negative ions are highly beneficial and share all of the benefits listed above. In the case of air ionizers, these negative ions aren’t naturally occuring, but instead are created through a method called “electric-discharge”.

air ionizer dangers - air quality

During the process of electric discharge, the negative ions that are produced may give off ozone, which can be a very harmful and toxic gas.

What is ozone?

Ozone is a colorless gas that exists in two levels of our atmosphere– one is good and one can be not so good.

air ionizer dangers - oxygen vs. ozone
Oxygen has 2 oxygen atoms while ozone is made up of 3 oxygen atoms, making it toxic for humans to breathe.

On one level, it exists in the stratosphere (which is approximately 6-30 miles high) and helps to protect Earth from the sun’s harmful radiation.

On another level, it also exists at the ground level, which is the air we breathe. Ozone in this part of the atmosphere is not good.

Ever see those ozone alerts as you drive down the highway or on the nightly news?

These are generated to let you know that ozone levels at the ground level may be reaching unsafe levels.

High ozone levels in the air you’re breathing can have really nasty side effects including damage to your lungs, chest pain, coughing, or shortness of breath.

Do air ionizers emit ozone?

So the million dollar question- do air ionizers emit ozone?

In short, yes they do.

Any man-made high-energy particle, like a negatively charged ion can generate ozone as a by-product of the molecular reaction.

Anyone remember the Ionic Breeze from Sharper Image? This product was one of the first air ionizers that came out.

Initially it was widely popular, but trouble came when third-party review sites began to question not only the validity of the air purification system, but also the dangerous levels of ozone that it was emitting.

SHarper Image Ionic Breeze air ionizer advertisement -1999 - source: The Hustle

What resulted from this product was a class action lawsuit, bankruptcy for Sharper Image in 2008, and revised federally-mandated standards (under the Clean Air Act) that put limits on the amount of ozone that a machine like this could generate.

Under these new regulations, the US Food & Drug Administration (FDA) required that indoor medical devices can only produce a maximum of 50 ppb (parts per billion) of ozone.

For comparison, the National Institute of Occupational Safety and Health (HIOSH) advises that indoor ozone levels be no greater than 100 ppb.

Air ionizers today are often fitted with ozone sensors that help to monitor, suppress, and prevent high levels of ozone from sneaking out into the air you breath.

The Bottom Line

Deciding whether or not an air ionizer is right for you is a personal decision. There are certainly benefits to air ionization that be difficult to achieve with a standard air purifier, but with those benefits also come potential risks.

Ozone is a real threat to our health, when consumed in high levels, but today’s air ionizers are federally-restricted in the amount of ozone that can be produced as a by-product of these machines.

At the end of the day, you have to decide for yourself and your family if the benefit of ionized air outweighs the potential risk of increased ozone levels.

Do your research, understand the technology, and move forward into a home with cleaner air.

More Resources

About Derek Hales

Derek HalesDerek Hales is the Founder and Editor-in-Chief of He has been featured in Fast Company, Reader's Digest, Business Insider,, She Knows, and other major publications. Derek has a Bachelor's Degree in Business Administration from Kansas State University. Hales has been testing and reviewing products for the home since 2014.

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172 Comments on “Air Ionizer Dangers: Are Ionic Air Purifiers Safe?”

  1. Hi Derek,
    I am a bus driver that drive 8-10 hours daily, and concern with the nitrogen oxides, carbon monoxide, and other pollution. Also I have very bad allergy when outdoor with pollen of grasses and weeds triggered by summer (sunny weather) allergies. I consider buying AirTamer Advanced Rechargeable Air Purifier A315 Portable Negative Ion Generator. Per their website Q&A on Ozone,

    We at AirTamer® are sensitive to the fact that cleaning the air should not produce unsatisfactory levels of ozone, so we test for ozone emission. AirTamer® produces no measurable amount of ozone. In fact, AirTamer® was tested to the California (CARB) standard for air purifier ozone emission, and AirTamer® was given an ozone emission rate of zero. The independent Intertek test report is available upon request from AirTamer®.
    I didn’t request to check upon further with the test report, do you think it is safe to wear this all day and for a long period of time around my necks as I am driving in the city all day. Thanks in advance.

    • If they are making that claim so directly then I am inclined to believe them. Deception with a claim like this would land them in a huge amount of hot water, so I think it’s genuine.

      Given that’s the case, then there is no reason to think this type of a necklace would be unsafe to wear. I think you’re fine to buy and use it.

  2. Hello 🙂
    Thank you for writing this article. If I keep the ionizer setting off (on the coway mighty for example), will the purifier still emit a small level of ozone? It’s hard to find an air purifier with the right CADR without an ionizer option for the area of coverage I’m looking for.
    Thank you!

    • No, it will not.

      For the types of purifiers like Coway Mighty that use an ionizer in addition to other filter types, even when turned on they typically produce only safe levels of ozone. So there’s not much risk there.

  3. I just ordered AD002 Upgraded Air Purifier Necklace with Ultra-high Negative Oxygen Ion Concentration from Is this one safe?

    • Most likely safe, but probably not very effective.

      I really just don’t believe the technology is at a level where these types of necklaces would have a measurable impact. However, because of their size, they also are likely not able to generate high energy ions, which means the level of ozone they create is most likely safe.

      That said, I am just guessing here. I don’t know that product very well. So basing my assumptions on other technology I’m more familiar with.

  4. Hi Derek, thanks for the great and informative article!

    I recently bought a HEPA air purifier that also has a negative ion generator from Amazon (link to product below). To be honest, I didn’t do much research because it had so many good reviews and wasn’t too expensive. After a couple days of use, my girlfriend complained of a stuffy nose, and I’ve been having a consistent minor headache, so I looked up if air purifiers can produce such symptoms and then came across this article (among others) testifying to possible harm from negative ion generators.

    Curiously, it’s hard to find much information on this model outside of its Amazon page (I’m in Germany), but was wondering if you think it’s on the level? Or would I be better sending it back and investing in a purifier without an ion generating function? I should note that I have chronic asthma and so the ozone generation does worry me, but it’s hard to tell how much my machine is actually producing. Any thoughts/suggestions would be appreciated!



    • Typically air purifiers like this don’t create high enough energy ionic particles to be dangerous. However, it’s not impossible.

      I would suggest just turning it off for a while and seeing if your symptoms decline.

    • According to their website, “Complies with federal ozone emissions limit (ARB Certified)”

      So the answer would be no.

  5. Taking the Potential ozone hazard out of the equation, still aren’t these devices simply weighting down particles in the air to the surface which may be the floor but could also be your desktop your bedsheets your clothes etc.? So it may be cleaning the air but really making the surfaces worse!

    • That is basically correct.

      However, it’s easier to clean them from floors and surfaces than it is from the air. So any ionic air purifier would need to be coupled with regular vacuuming and other surface level cleaning.

  6. Hi,
    I am looking to buy Kogan 5 Stages air purifier 3S 12H.
    It mentions about 5 stages purification
    1. Pre filter
    2.H 13 HEPA
    3.Active Carbon
    4.Antibacteria filter
    5.Ionizer helps a neutralize pollutants and viruses using positive and negative ions and hydroxyls.

    Should I buy it Will it harmful?
    What is the different with 3 stages airpurifier (1-3 filters)?
    Do all air purifiers use ionizer system? Thank you.

    • These types of air purifiers are typically safe. While it is an ionizer and most likely creates ozone, it’s most likely not creating high energy particles, and therefore the level of ozone generated is within safe levels.

      The pre-filter is a really basic, usually plastic, filter that traps super large debris…think pet hair, bits of carpet, etc.

      The H13 HEPA is doing the vast majority of the actual work in terms of particulates trapping and removal.

      The carbon filter removes odors.

      Not all air purifiers use ionizers. Some are just HEPA / carbon (in fact those are far amore common).

    • Hi Derek,
      Thanks for your reply.
      It is very useful and I feel confident to buy it.

      There is negative Ion button , should I turn off at all time? Or when I can turn it on.
      Thank you.

    • That’s up to you. I’d leave it on, as I’m confident in the safety for those types of ionizers (they just aren’t all that powerful).

      Turn it off if you’re worried in the slightest. It won’t have a big impact either way.

  7. I have old Sharper Image Ionic Breeze air cleaners that are in excellent condition. Should I not use them and dispose of them?

  8. I have a pacemaker. Will the “electric discharge” interfere with my device? I’m not able to use a scale to weigh myself that measures the water weight because of the electrical current it uses…for example. Just trying to make sure I don’t harm myself while trying to improve my health.

    • Unfortunately, I (nor is anyone at Modern Castle) qualified to answer that question. You should pose that question to your doctor.

      But if you want to be safe, just don’t use an ionizer at all. HEPA purifiers are more than capable of air purification.

  9. Ions that are on a surface can prevent bacteria from growing. Basically, they can not process protein so there is no cell division and they die off. A virus is different but the ion approach still works. Glass, ceramics and Marble/Granite can all be ion exchanged to create silver or copper ions in and on the surface.
    So far, I have ion exchanged silver into/on glass. This produced a slight amber tint and the resulting silver ion surface was tested and certified to be anti-microbial. Awaiting results for anti-viral certification. The company I work for is offering this product for public spaces as sort of a contact barrier. Unlike plexiglass, glass does not scratch and can be cleaned easily. The silver ions are in/on the glass and do not come off as they are part of the glass (sodium comes out and is replace by silver as ion).
    The copper process is better as it is colorless and the ions reduce bacteria colonies faster than the silver ions.
    The company I work for does not do this on marble, granite or ceramics. Just glass and it required high temperatures to exchange ions in glass. On granite or other porous surfaces, heat is still needed but much less.
    I would suggest that if you are interested, research it. Many research documents exist. Works on metals as well but for that, easier to just use real brass or copper knobs on doors and such.
    Ions in and on surfaces are not an issue like ozone or other high energy particles in the air. There are many patents on the silver ion products but they are typically old and no longer enforced. Not all the processes that are patented work but the simple ones do work well, the complicated ones just make it harder to understand the simple method behind the process. The Romans and Greek used this back in the BC and AC times. It is not new and for many years, copper plumbing was the thing. Copper was and is a natural way to kill off bacteria,,, PVC, CPVC, PEX and all the other stuff just don’t do this.
    Do the research, there are safe methods that produce a permanent surface for anti-microbial and ant-viral properties that are safe for your families. Me, just a scientist that researches everything. Then figures out a way to get the same result in a very simple manner. I have quite a few patents for for how to make it better by making it simpler.

  10. I heard that cruise ships are starting to install ionizers on their ships to eliminate covid-19, is this not misleading passengers that this can guarantee to make the ship virus free? Do ionizers produce ozone and do they kill covid-19?

    • I don’t think any person, company, or brand can ever guarantee that any location is “virus free”. It’s just an impossible task, in my view.

      Most ionizers do produce ozone. However, commercial grade ionizers often include an ozone suppression systems. So it may be moot.

      Technologies vary as to how / if they deal with COVID-19. Some can, some can’t. You’d need to see what tests the manufacturer has completed.

  11. Is there anything on the market that still gives the “after a thunderstorm” clean air smell? I loved my old tabletop Ionic Breeze. I have purchased several air purifiers over the year but none of them give off that clean smell. The Ionic Breeze helped me sleep and controlled my rhinitis during the night.

    • There are. Any high powered ionizer will do that. However, it releases significant ozone in the process, which is not safe.

      One of the primary reasons Sharper Image is no longer around is because of lawsuits resulting from the Ionic Breeze, which created unsafe levels of ozone.

  12. I find it very interesting that everyone looks at Ionizers and is only concerned with ozone. Ozone is very harmful however, you can have an ionizer installed and it meet UL 2998 which basically states that no ozone is being produced by this product. No one is looking at the by-product of pumping a lot of ions into a space occupied by people. Those ions create hydroxyls which is part of Reactive Oxygen Species.
    It is well established that oxygen free radicals and their metabolites-collectively called reactive oxygen species (ROS)-can induce direct cell injury, which may trigger a cascade of radical reactions promoting the disease process.
    Lungs are vulnerable to endogenous and exogenous sources of ROS insults. They are well equipped with antioxidant defenses to negate normal oxidative insults. However, when the oxidative defenses are overwhelmed by formidable oxidant influx, injury results. Diseases are linked to this type of influx. Again I am not talking about OZONE. Everyone better get a good understanding on what happens when you introduce tens to hundreds of thousand of ions per cubic centimeter into occupied indoor spaces. ASHRAE 2019 9.4 clearly states that ionizers should not be used in occupied spaces.

    • Thanks for sharing your thoughts, Shaun.

      If the mere presence of a significant volume of ionic particles is really as dangerous as you are asserting then it would seem most regulatory and government bodies around the world have failed in their mandate to protect citizens.

      Why do you think these organizations are not recommendation disuse of all ionizers (even those that do not create ozone)?

  13. Derek,
    Thank you for your response. I will do that. I have also ordered an Ozone monitoring device to see how the levels vary. I believe that there are acceptable levels but for fixed periods of time.
    Thank you again for your quick response.

  14. I recently replaced all of my HVAC units in my house and had Air Scrubbers installed in each unit – 3 total – 2 on main floor – about 3500 sf and one in the basement – 1500 sf. I live in Phoenix so the units run quite a bit. The air scrubbers in installed are by AERUS model A1013P. When we leave the house for a bit and come back you can notice the smell of Ozone in the house. Is it safe to have these units running all the time and is 3 to many to run? Please let me know your thoughts.

    • If you are smelling ozone that’s not good.

      I would strongly suggest you get a professional air quality reading and make certain that the ozone levels are safe within your home.

    • Because of the COVID-19 pandemic and the continuous need for me and my family to go out & meet other people because of work, I’m now considering to purchase portable (necklace) air purifiers that is said to emit large amount of “healthy” negative ions. Do you think these have been tested vs producing ozone? Would you consider it safe to be exposed to such large amounts of negative ions (within your personal space) daily?
      I’ve tried to look for articles explaining the negative effects of being exposed to these kinds of devices for a long period of time and nothing much has come up.
      Hope you could share your views on this.
      I’m thinking of giving these to my family as a Xmas gift.

    • The idea that they are “healthy” ions seems to be a farce.

      I expect what they mean is that they don’t produce a large (if any) quantity of ozone.

      As far as if it’s safe, honestly, it’s an open question. To have these so close to your face and person would be concerning to me, especially at high volumes. While there is no definitive research (to the best of my knowledge) as to the safety or danger of this type of product, I would personally avoid these types of products.

      In my view, an N95 or equivalent facemask is more effective and we know with certainty that it is safe.

  15. hi there, have you come across of a negative ion generator or machine that of great help to paralyzed person or reversed it thanks

  16. Hi! There are a lot of personal purifiers (necklace types) that has come out in the market because of COVID-19. They are mostly ionisers , that emits from 2million to 120million ions per cm3/second and is suppose to create a safe environment within 3 feet of the user. Supposedly safe for the users . There is also this portable LUFT cube that uses nanotechnology. No filter, no ozone, no ions.

    • Yeah, I’ve seen many of them. Thus far I am extremely doubtful of the claims they make and their overall effectiveness.

  17. I live downstairs from smokers living above me. There are evenings I have trouble sleeping the smell of the smoke is so bad. I used to own a sharper image ionizer and it left the room smelling so fresh and clean all the time I loved that about it. But then it broke and shortly after I heard about the emitting of ozone and it not being healthy so I never replaced it. Now years later I have purchased numerous air purifiers including a Molakule, Bluair, and a Conway and so far not one of them has helped with the strong smoke odor. Do you have any suggestions? I really do miss how the ionizer made my room smell so fresh and clean is there anything else out there that is safe that can do that and get rid of the bad cigarette odor?

    • Since you’ve already tried several air purifiers with limited success I think it’s fair to say you need something more robust. You may consider a system like this –

      This is an in-dust ionization system. It creates high energy particles that are great at dealing with odors and other particulates. The creation of those particles mean it also creates ozone. However, it uses a ozone suppression system, so that the ozone does not get into your air.

      Full disclosure, Clean Air Exp is owned by a personal friend of mine. However, I, nor does Modern Castle have any financial relationship with them. As far as ionization systems go, this is the only one I’ve seen that has the right mix of hardware to create effective ions, while still being safe with respect to ozone.

  18. Hello,
    I have one Honeywell HHT-011 air cleaner with Ionizer for each of my 3 bedrooms. These Ionizers are turned on for 8 hours every day, and I have one Therapure TPP300D with UV + Ionizer that is turned on for 8 hours in my living room. Do you think it is OK for the people in my house?
    Thanks for your time.

    • I’m unfamiliar with those models, so I really cannot say for sure.

      I would suggest you reach out to the manufacturer to better understand if / how much ozone they are putting out into the room. As long as it’s none / less than 0.1 ppm then you should be fine.

  19. Hi. As I read… I have 5 Sharper Image Air-purifiers since 2005 that have ionizer… and just learned today Sept. 19th of all the health concerns. Now I understand why they closed all the stores and went bankrupt. They were irresponsible with their units and with the consumers if this was their primary issue in the law suit.
    Moving on, I don’t know if I have a chance in reporting the machines I still own by Sharper Image. Today I am looking for the best option with no ionizer for a space of 900 sq ft and I found Medify MA-40W V2.0 Medical Grade Filtration H13 True HEPA for 840 Sq. Ft. Air Purifier, 99.9%
    And here someone mentioned the Intellipure Ultra AirPurifier… Which if any you suggest. Thanks

  20. I just purchased a Blaux Portable AC F832. It is very small and has a rechargeable lithium battery. It also has a negative ionizer option. Should I be concerned about the amount of ozone it produces or just operate it without the ionizer? Thank you so much for your help.

    • I would just operate without the ionizer enabled.

      It probably is safe even with it on, but no reason to take a chance, in my view.

  21. I recently had a Reme Halo installed in my A/C system. Immediately it gave off a very “chemically’ smell. I have COPD and emphysemia and have been told that any amount of ozone is damaging to lungs. Should I have it removed?

    • I wouldn’t remove it just yet. Turn it off for now if it’s creating a chemical smell.

      I would suggest you hire an air quality specialist in your area to test the air in your home both with and without it running. You need to better understand the impact it’s having on your air and if that’s safe, given your health conditions.

      Ozone typically isn’t described as a “chemical” smell, so I am doubtful that’s what it is, but it could be (or perhaps something else).

  22. We have a Lightning Air Purifier, LA 1500w, that we purchased about 15 years ago. It states Cascading Tower Technology. We only use it on an occasional basis, but started using it again with the wildfire smoke that we are experiencing.
    Should we have any concerns in using this purifier

    • Unfortunately, I am unfamiliar with that model / brand.

      If it’s producing high volume ozone, then no, I wouldn’t risk turning it on. But if you don’t think it’s using ozone to purify the air then it should be safe.

  23. Hi there!

    I was just informed that someone has purchased a Atmosair Matterhorn 1000 Bipolar Ionization unit for our home as a gift. I’m trying to decide if it’s something I should install or send back.

    I’m confused because on the website it says “A safe, natural and environmentally friendly process. Our patented bipolar ionization technology uses no chemicals, heavy metals or mercury, and produces no harmful by-products such as ozone or ultra-violet light.” But all of my research says that ionizers do produce ozone.

    Would you have any insight? Thank you so much!

    • It is possible that it creates no ozone and/or that that ozone is suppressed.

      I recently had a lunch with a friend who has been working in the air purification industry for 30 years. He mentioned to me that there are some new types of ionizers that do not create ozone (a fact that I was previously unaware of).

      It’s possible that their brand of ionization does not create ozone or that it’s so small it’s negligible. I need to do more research on this specific type of technology to say for sure.

      I’m sorry I don’t have a more clear cut answer.

    • Amanda,
      My research also states that any ionizer creates ozone. The EPA made UL 2998 to identify devices that are acceptable levels of ozone. I believe it is 5 parts per billion. I have also read research on the efficiency and toxicological implications of devices that produce ions and they state that in order to remove the amount of VOC’s and viruses in a real life application the PPB would have to be significantly more than 5 ppb. And this would inevitably lead to ozone being released.

  24. I have an air intellipure.. what’s your opinion on this air purifier .. I am also considering air tamer or anion .. or the portable plasma air purifier using plasma technology .. it very confusing what to choose .. appreciate your opinion. Thank you.

    • We haven’t tested the Intellipure yet, so we cannot say for sure. However, based on the specs and other reviews I’ve seen it would seem to be an excellent air purifier.

      Unfortunately, I’m unfamiliar with Air Tamer and Anion.

  25. I recently used a stand alone Hepa and charcoal filter air purifier. It left a nasty smell in the home and increased the humidity in my home. Any thoughts on this?

    Thank you!

    • Was it new? What was the brand?

      I can think of no reason why it would increase the humidity in your home. That to me seems like there must be another factor at play.

  26. Hi Derek, thanks for the info. I did not see the Dyson HP01 or what is called the Dyson Pure Cool LInk Air Purifier above. Locally that is what is available-would you recommend either?

    • Between those, I would go with the Pure Cool Link (which is most likely the Dyson TP01). HP01 offers purifying and a heat function. So unless you really need / want the heat function, no need to pay extra for it.

      We have an extension Dyson Pure Cool comparison here – – if you’re interested

  27. Hi Derek,
    The RabbitAir MinusA2 air purifier advertises that its Germ Defense Filter “traps and reduces airborne bacteria, mold spores, and viruses”.
    You probably get this question a lot-would that include trapping coronavirus? I thought that the virus was too small to be caught by a filter. Elsewhere I have read that UV emitting machines if they are at the right frequency could kill the virus. But I’ve never seen a claim for a filter that way. What do you think? As always, thanks for your information.

    • Hi Bevan,

      Unfortunately, there isn’t a perfect yes or no answer here. And this isn’t just about Rabbit Air, but about all air purifiers.

      An air purifier can help to keep the air in your home or office cleaner, which can help to reduce the chance of coronavirus spreading. But, there are no absolutes. The EPA does a good job of explaining it here –

      As I understand, COVID 19 and other virus / bacteria are able to become airborne by attaching themselves to particulates that float in the air. This can include water droplets (when you sneeze or cough), dust, hair, fibers, mold, pollen, and a slew of other particulates. Air purifiers are able to reduce bacteria and viruses in your home by pulling these floating particulates out of the air and trapping them within their filters. That’s how the Rabbit Air’s germ layer works, and basically how any filter works.

      While the virus themselves may be too small, the virus is hitching a ride into the air on larger particles. It’s those larger particles that are trapped, collectively trapping the virus also.

      As far as UV light, I’m not as knowledgeable about UV light. From what I’ve read and watched it seems to be an impressive technology. However, it be effective they need to be on for an extended period of time and extremely bright. Most of the UV light consumer grade products aren’t bright enough or on long enough to be effective.

  28. Does anyone have any thoughts or advice on CWR’s rechargeable personal Air Purifier. I am a school teacher going back into the classroom would this help at all with Covid 19

    • We haven’t tested it yet, but a quick look at the product’s form factor really makes me question the effectiveness.

      I understand it’s only for personal use, but I am doubtful that it’s capable of pumping out enough air flow to have any significant impact.

    • We haven’t tested it, but based on a quick look at the specs, it is an ionizer, which means it most likely creates ozone. However, given the size, the level of ozone is probably within what the federal government considers safe.

      That said, given the size I am doubtful that it’s capable of having a significant impact on air quality around you. And for $150…yikes. I certainly would not buy it.

  29. Hi, I have an air oasis iadaptair M

    It has uv light hepa and bipolar ioniser. First time using I felt terrible. I assume it’s the ozone from the ioniser. Is it even worth keeper at all or will a standard hepa do just as good? All this information about ozone I’m worried to ever try it with the ioniser setting.

    • Hi Lee,

      If it’s making you feel sick you should get rid of it.

      HEPA filters do just as well as high power ionizers, but without the dangers. Most hospitals still use HEPA filtration, quite simply because it works.

      See our list of air purifier reviews here – – The vast majority are HEPA-based.

    • I would not.

      It appears to be an ionizer. I’m amazed after all of the bad press (and rightly deserved) from the 1990s / 2000s that ionizers like this still exist.

      If this machine creates enough high energy ions to be effective then it’s dangerous due to the level of ozone created. If it doesn’t create enough high energy particles then it won’t be effective. It’s a catch 22 and one that involves your health / safety. To me, it’s not worth it.

  30. Any review you can give me about the Brookstone Pure-Ion advanced ionic air purifier with ozone control? Thank you!

    • I read a few product reviews and I cannot find any models that say “with ozone control”, so perhaps I’m looking at the wrong models.

      In any case, the product descriptions I’ve read leave me worried. It seems like a pretty typical ionizer. If it is (and that’s an if, as I am not 100% sure), then it is dangerous.

      All the places I looked are out of stock / not for sale…that feels to me like it may have been pulled from the market at some point. Given the lack of clear information in the product description I would not ever buy a product like this for my home.

  31. My 2009 Toyota Camry says that it has negative ion air-conditioning. I have never heard of any recalls or problems with it but I do have concerns. Should this be something I need to worry about?

  32. Hi, is the I-wave-R product ok to use? it is installed in the air conditioning system behind the filter. Was offered and installed by my air conditioning company.

    • I’m not familiar with that model, but a quick read through their page makes me a little uneasy. Doesn’t mention anything about ozone suppression or a lack of ozone.

      I would suggest you inquire on whether or not it’s generating and/or suppressing ozone.

    • Hi,

      I inquired with the IWave company. They claim only a very small amount of ozone is released when it first turns on. If on continuously there is basically no ozone… any thoughts?

    • If it’s creating a small amount of ozone then it’s probably safe. You just want to avoid air purifiers that create large volumes of ozone, which can be dangerous.

  33. We need to install air filtration and purification in our house using either room units or something installed into our HVAC system. Considering Molekule stand alone units for each room vs. installing a bi-polar ionization system in our HVAC along with HEPA filtration. The bi-polar unit being considered is similar to the I-Wave R. Since our main concern is killing and eliminating mold particles, would the Molekule be the better choice? A bi-polar system, it seems, would cause any airborne mold particles to fall to the ground but wouldn’t eliminate them unless vacuumed up later whereas the Molekule seems like it would not only kill the particle but also eliminate it completely. Thoughts?

    • That’s generally the way ionizers works (at least to the degree of my understanding). If that’s your primary concern then yes, I would think a standalone air purifier, be it Molekule or something else, would be a better choice for you.