What are the Best Negative Ion Generators in 2019?

If you are looking for the best negative ion generator without ozone, this page has a detailed review of the top 3 high-density negative ionizers currently for sale and why they are recommended.

Keep in mind, this is a review for true corona discharge air ionizers. Most ionizer reviews cover ‘ionic air purifiers’ or ‘anion generators’, which tend to be catchall terms for devices that use primarily ozone, rather than negative ions, to clean the air.

Negative Ions versus Ozone

While ozone emitting ionizers are good for eliminating odors and airborne pathogens, and may incorporate ion generation, like this popular one, they aren’t recommended for extended periods of use near where you work or sleep.

Ozone is reactive and unstable and if you can smell it (a faint bleach-like odor), then you shouldn’t be breathing it in for too long. At high concentrations, ozone can be a lung irritant and is considered dangerous to asthmatics.

Negative ions on the other hand, like the air at the beach, are exceptionally healthy to breathe in. And, at the levels generated by the ionizers reviewed ahead, will quickly and effectively clear indoor air pollution, without the health risks of ozone.

What to Look for in a Good Air Ionizer

First of all, if you want a true high-density negative ion generator, rather than an ozone-generating ‘ionic air cleaner’, look for the manufacturer to clearly state the negative ion output per cubic centimeter per second (the higher the better).

If a machine labeled ‘ionic’, ‘anion’ or ‘ionizer’, doesn’t list the amount of ions produced, then it’s likely that ozone generation, rather than negative ion production, is the primary air cleaning method.

The best negative ion generators will highlight their high ion output and show tests to confirm that they don’t produce ozone (or well under the safe 0.05 ppm CDC limit). If they don’t, then consider them suspect.

Good air ionizers should also be very cheap to run, with no filters to change and requiring little energy, even when left on all day, as many users like myself do to maintain constant air purification.

Now that you know what to look for in a good negative ionizer, let’s review the best 3 I’ve found on Amazon in 2019 for a reliable place to buy them from.

Best Portable Ionizer with USB — IonBox

Negative ion emitterThe small and portable ionizer market has a clear leader in the highly popular IonBox here on Amazon. There’s simply nothing like it for such a low price.

It’s small enough to fit in the palm of your hand, yet generates an impressive 20 million negative ions pcs/cm3, far more than any competitors I could find (most of which are primarily ozone generators).

IonPacific, the manufacturers of IonBox, claim it is capable of quickly removing cigarette smoke, airborne bacteria, pet dander, pollen and other allergens from the air you breathe.

They also say it delivers its air cleaning ions in an area up to 500 sq feet, without producing detectable ozone and has a 1 year warranty.


There are two features I particularly like about the IonBox home ionizer. The first is that there are no replacement parts ever needed, unlike HEPA-based air filters.

And the second is that this unit can connect not only to a regular power socket, but also to a USB port on your PC, laptop or even in modern cars. That, along with its compact size, makes it easy to take with you anywhere.

It’s also very energy efficient, using a minimal 1.5 watts of electricity. You could easily keep this on your work desk all day to counteract positive ions from electrical equipment with hardly any power consumption.

Other good positions for it would be in the bedroom, kitchen to eliminate smoke and cooking smells, and in the lounge room, near where you watch TV.

The IonBox is also great as a travel air ionizer due to its lightweight and small portable design. Some reviewers recommend several of these little air purifiers as they are so useful in different environments.


If you are looking for the best portable ionizer in a small size, yet with a high negative ion output and no ozone, it’s hard to go past the IonBox by IonPacific.

Check the price and see more pictures, specifications and customer reviews here to see if the Ionbox is the right one for you.

Top USA Made Air Ionizer — Vortex VI-3500

Anion generatorDon’t be fooled by its small size. This new 2019 model Vortex VI-3500 is an exceptional negative ion generator and air cleaner.

It is made in the USA by ionization pioneers and innovators Wein, who hold several patents related to this technology, and have been making negative ionizers for decades.

This deceptively powerful little air purifier ionizer produces an incredible 3.4 trillion negative ions per second using a unique ion generation method called ‘vortex wave’.

Vortex Wave Technology

The Vl-3500 produces such an unusually high ion reading by electronically pulsing tiny charges along a special corkscrew shaped ion emitter. Wein says this process creates ‘vortex waves’ of ions, swirling away from the unit at a rate of 150 feet per minute.

The pulsing ionization also stimulates airflow and draws airborne pollutants, like dust, pet dander, pollen, bacteria, viruses, cigarette smoke, volatile organic compounds, dust mite waste products and toxic mold spores, towards the device.

With millions of negative ions electrostatically attaching to these microscopic contaminants, they become too heavy to float and drop to the ionizer’s collection pad or fall to the nearest surface for vacuuming.


Wein state on the VI-3500 packaging that their new ionic air purifier will remove 95% of particulate matter (PM2.5) indoor air pollution in 30 to 120 minutes.

They also list room coverage as 800 square ft and enough to clean the air of particles as small as .01 microns in a large 40 ft by 20 ft living room for instance.

At the same time, due to its unique design, the Vortex VI-3500 room purifier creates no detectable ozone and has been tested to be well below the OSHA standard of 0.1 part of ozone per million parts of air.

Despite its power, this air ionizer runs on less than 4 watts of power, making it extremely energy-efficient. Even left on to clean the air in your home 24/7, it will use very little electricity compared to most other appliances. High Powered Ionizer

Another unexpected benefit of this air purifier is the ionic breeze it generates, with reviewers commenting that the air feels cooler, fresher and much cleaner to breathe.

Some Vortex owners describe it as being like breathing the air beside a waterfall or at the beach. This is unsurprising as ocean waves and waterfalls are two of Nature’s greatest negative ion generators.


For best results, position the Vortex VI-3500 on a table, shelf or some other elevated position at least 3 feet away from walls and other electrical equipment like TVs and computers.

Also, keep in mind that whenever you wipe down the collection plate to clean it, which is recommended every week or two, it’s best to switch it off first to avoid getting a mild electrical shock.


These simple precautions shouldn’t be any reason not to own this amazing little ionic air cleaner. The volume of beneficial negative ions the VI-3500 produces for its price is truly amazing.

You can see more specs, pictures and customer questions and feedback here for the new 2019 Vortex VI-3500 ionizer machine, made in the USA by Wein.

Best High Density Corona Discharge Negative Ion Generator — Twin Air Pro

Ion Machine for HomeIf the primary feature you are looking for in an ionizing air cleaner is extremely high negative ion output, it’s hard to go past the superior Twin Air Pro available here on Amazon.

This powerful room ionizer generates trillions of negative ions each second from its 22 negative ion emitting points, arranged across both tower heads of the distinctive silver design.


Ion counter testing, measured at 12 inches away from the Twin Air Pro, shows it flooding the surrounding air with at least 200 million negative ions per cubic centimeter. This is an incredibly high reading, usually only seen in commercial hospital ionizers.

At the same time, this ionizing air purifier has an extremely low ozone output that has been confirmed by testing as undetectable at 10 inches away. It also produces no harmful positive ions, unlike some cheaper models on the market.

The Twin Air ionizer runs on just 12 W of power, making it very energy efficient compared to ionic air purifiers with fan-powered HEPA filters.

This ion machine is also usually extremely quiet to run. While you may hear some faint clicking when it is first switched on in a polluted room, this should stop after a short time of ionizing the air to remove floating pollutants.

Negative Ion Generation Without Ozone

Unlike some other ionic air cleaners, there is no faint bleach-like smell emitting from the Twin Air. That odor is in fact produced by reactive ozone and can be dangerous in high quantities.

NaturAir, the manufacturers of the Twin Air Pro, have the tests to prove that it do not produce detectable amounts of this hazardous gas at 10 inches from the unit.

This is particularly important for asthma sufferers, young children and those with respiratory illnesses who are more susceptible to lung irritation from ozone.

A high negative ion count in the air, on the other hand, is highly beneficial for asthmatics, people affected by seasonal allergies, and those sensitive to dust mites, mold spores, pet dander and other indoor air pollutants.Negative ion machines


One factor to keep in mind when buying this room ionizer is placement. For best results position it in an elevated position, at least 3 feet from a wall and well away from other electronic equipment.

Be aware as well that you may get a mild static shock if you touch it while it’s on. When cleaning the Twin Air Pro, as is recommended every couple of weeks, it’s best to switch it off first for this reason.


The NaturAir Twin Air Pro is my pick for the best high density corona discharge negative ion generator on the market in 2019. It is a true air ionizer, specifically designed to flood the air with purifying negative ions, without generating ozone.

You can check the price and see more specs, pictures and detailed customer reviews here for the Twin Air Pro with free USA delivery and 1 year warranty.

Negative Ion Generation for Your Home

After many hours of research, reading technical specifications and contacting manufacturers, these are the only 3 ionizing machines I can recommend in 2019. Each of them are both ozone-safe and true high density corona discharge negative ionizers.

I hope this review of the best negative ion generators has helped you find the right one for your home so you can start enjoying the many health benefits of negative ions.

Please share it with friends who might be interested in where to find real negative ionizers and what to avoid when looking to buy one.

There’s a lot of badly designed ‘ionic air cleaners’ out there that mainly rely on ozone, instead of beneficial negative ions, and may actually be doing more harm than good, particularly to children.

If you’d like to take the air purifying benefits of negative ions with you when you drive, there’s another detailed review of ionizers for cars here.

I’ve also recently completed a comprehensive look at the best ionic air purifiers in 2019 that actually produce significant negative ions here.

If you are looking to clean the air in a larger living space, whilst still receiving beneficial negative ions in the air you breathe, it would be well worth reading this air purifier review as well.

This article may contain affiliate links to products I recommend. As an Amazon Associate I earn from qualifying purchases.