Holds a Master’s degree in Engineering and is keen on her own home’s climate. Sometimes we think that Carolina owns every single product she writes about – that’s how profound and insightful her reviews always are.
For 8 years, Richard had been working as an HVAC specialist and AC unit installer since his student years. Now, he’s our main consultant on every technical aspect that may arise during our tests and research.
Last updated: May 10, 2021
Ozone is widely known because of the ozone layer in the atmosphere, but did you know that it can have a practical use in everyday life? A lot of people ignore the benefits that ozone can have, or just don’t realize you can buy a machine to generate ozone. In this guide we’re exploring the best ozone generator options so you can choose the best model for you, whatever reasons you need a generator for. There’s a lot of conflicting information about ozone generators out there so we are also aiming to put this straight with information about the use of ozone generators.
In order to create our ozone generator reviews we’ve looked at some of the vital features including the weight and size of the generator (whether it is portable), how big an area it can cover, the output and any warranty that the manufacturers might offer in order to make your purchase a little more safe and secure as you are covered if anything goes wrong. We’ve also looked at the safety features that are so vital when considering an ozone generator.
Other features: ceramic ozone plates, washable stainless steel filter, 180-minute timer, CE and RoHS certified, max 100 CFM, 35 dB noise level
Our editor’s choice is the Enerzen Commercial Ozone Generator which is a great all-round product, which also doesn’t break the bank.
There are a lot of great features packed in for such an affordable piece of kit, and it can cover up to 3500 sq ft, so it’s suitable for most garages or decent sized rooms. It weighs in at just 4.9 lbs and is pretty portable so you can take it out and about or use it in the car if you need to (though you need to ensure you can power it). It uses 60W power supply and comes with both CE and RoHS certification so you can rest assured that health and safety has been considered. 35 dB noise level means relatively quiet operation, too, and the airflow of 100 CFM is respectable. It isn’t the most powerful item on the list but it’s more than enough for most people.
What we like: This is a real all-rounder and as well as giving good value for money it has some convenient features like a timer and washable filter included to improve air quality. It’s easy, convenient and affordable.
What are the flaws? This has a one year warranty which is good, but not the best out of all the models on the market. Some offer up to five years and beyond! This isn’t the biggest issue and might not be a dealbreaker for you.
Why is it special?
Comes with health and safety certifications.
Great value for money.
Alpine Air Commercial Ozone Generator – Best Value
Output: 5000 or 10000 mg/hr
Coverage area: 2000 sq ft
Dimensions: 11 x 9.7 x 8.5 in
Weight: 6.37 lbs
Warranty: 1-year limited
Other features: ceramic ozone plates, washable filter, adjustable ozone output, 2-in-1 model
The Alpine Air Commercial Ozone Generator is very similar to our editor’s pick, but we’ve named it the best value as it is a 2 in 1 model with quick access adapters, and only costs a little more than some of the very cheapest ozone generators.
This comes with some similar features to the Enerzen. It has a 6000 hour service life and washable filter so it doesn’t need to be replaced. The deodorizer can provide up to 10000 mg/hr of ozone, and has quick access adapters so you can remove the plates in just 15 seconds if needed. This is called the QAH or quick access holder.
It has a handle attachment and really simple controls to switch the output up. The coverage area is 2000 sq ft, which isn’t as high as the editor’s pick and is one of the reasons it just falls short.
That said, this is such a lightweight and portable design with plenty included for the money so the value is clear to see for everyone.
What we like: Very clever QAH holder allows you to remove the plates almost instantly. It also has quick and easy controls and a portable design.
What negatives must you be aware of? Realistically, it would be better if this could cover a little bit larger area when needed for larger rooms and spaces.
Why are we impressed?
Clever, patent-pending design.
Can last many years.
One year protected by warranty.
Airthereal B50 Mini Ozone Generator – Budget Pick
Output: 10-50 mg/hr
Coverage area: 320 sq ft
Dimensions: 3.3 x 4.1 x 3.8 in
Weight: 6.1 oz
Other features: plug-in model, 34 dB noise level, one control knob
Next up is the Airthereal B50 Mini Ozone Generator which could prove to be the best ozone generator for home use if you just need to cover a small area. This is certainly not a commercial ozone generator for use in large spaces, but it has some very simple controls making it a wonderful choice for small areas, plus it’s very affordable compared to the other models on the list.
It has a 10-50mg output which is really small, so it can work in smaller areas, such as closets. You might use it to eliminate odor from clothes or a space where a pet has been kept for example.
The controls are really simple so anyone can use it – you really don’t need to worry about understanding all of the aspects of ozone generation. This may also be one of the best ozone generators for hunting due to being so portable and good for small spaces. It can be used on your hunting clothes.
It generates just 34 dB of noise so it shouldn’t annoy you, and can cover spaces up to 320 sq ft.
What we like: The really simple operation and the fact that this can be used just about anywhere with a power supply is a big positive of the design.
What is not ideal about it? Larger rooms won’t really be suitable for this ozone generator. It’s best on closets and small rooms like bathrooms.
Why did it make our list?
Portable and easy to use.
OdorStop OS3500 – Best for Hunters
Output: 150 to 1800 mg/hr
Coverage area: 3500 sq ft
Dimensions: 12.5 x 7.5 x 9 in
Weight: 10.5 lbs
Warranty: 5-year limited
Other features: vast variety of models available, 110 CFM, washable antibacterial filter, 12-hour timer with hold
We’ve named the OdorStop OS3500 as the best odor generator for hunting, it is also a great ozone machine for home use.
The reason why it has such a great reputation for hunters to use is the fact that it does such a fantastic job on odors. This is the primary reason for hunters using an ozone generator. It also has respectable airflow of 110 cfm and you can easily adjust the mg output to suit between 150 and 1800 mg per hour.
This is one of the models that has a five year warranty so you shouldn’t have to worry about the longevity of the generator. It should continue to work for a long time to come. It has a washable filter, another reason why it is so good for odors. There’s even a 12 hour timer so you can set when this machine kicks in and starts working.
Though we’ve picked the 3500 model, there are loads of different models, so there is bound to be something to suit your own specific space. You can use a handy chart by the manufacturers to check which will be best for you.
What we like: The fact that this does such a great job of odors and comes in lots of models so you can choose the ideal size for you.
What cons did we find? The included instructions could be a little clearer to help you to use the generator.
What makes it special?
Lots of models to choose from.
Does a great job on odors.
Comes with a timer.
Airthereal MA10K-PRO Ozone Generator – Best Quiet Model
Output: 10000 mg/hr
Coverage area: 2000 sq ft
Dimensions: 7.1 x 9.3 x 6.8 in
Weight: 6.6 lbs
Warranty: 5-year limited
Other features: 100 CFM, 0-120 min timer, less than 45 dB noise level
If you are looking for the best spa ozone generator or something that can be used at home and make minimal noise then this could be for you. it has a low, less than 45dB noise level even when operating on max.
The generator could also be the best commercial ozone generator as it has a large output of 10,000 mg/hr, meaning that it can cope with big spaces and do a very thorough job.
There’s a 0-120 min timer which can help you with some of your safety concerns and it uses a standard 110W power supply. The 6.6 lbs weight is very reasonable, meaning it can be moved from space to space simply and effectively. There’s also a 5-year limited warranty included as standard. It has a 20,000 hour service life so you should be able to use the ozone generator over and over again.
What we like: The exceptionally quiet design is fantastic and makes this a great ozone machine for home or for use in a commercial setting.
What negatives must you be aware of? This generator only covers 2000 sq ft in spite of having a high output, so the coverage area could be a bit higher in an ideal world. For most homes and businesses though, 2000 sq ft is fine, so this won’t put you off buying the Airthereal MA10K-PRO Ozone Generator.
Why are we impressed?
Extremely quiet operation.
Fantastic warranty and long service life.
VTAR Ozone Generator – Best Versatility
Output: 500 mg/hr
Coverage area: smaller areas
Dimensions: 6.7 x 9.45 x 2.8 in
Weight: 2.2 lbs
Other features: 5 levels timer, disinfection and deodorization, wall-mounted design, easy to operate
This has been named one of the best models on our list of ozone machine reviews, and it is great for smaller areas, but also has the versatility to be used in cars. The extremely lightweight design and the fact that it is meant to be portable means it is ideal for putting in a vehicle to get rid of mold or unwanted smells.
It’s very easy to operate with clear instructions on the front of the VTAR Ozone Generator. It is wall-mountable so if you want to you can have it permanently stuck to the wall of a room, but this is optional. As it weighs just 2.2 lbs, a lot of people like to take this machine out with them or use in spaces like their vehicles.
It has a timer with five levels and offers disinfection (making it one of the best ozone generators for mold).
The output is pretty modest at 500 mg/hr and the exact coverage area isn’t specified, so it won’t be the best for large spaces.
What we like: This is very easy to control, move around and use within vehicles, and can even be wall mounted.
What is not ideal about it? Though it has a fairly low output rating it doesn’t really specify the sizes of rooms it should be used in. It’s fine for cars, but it can be hard to establish other suitable places.
Why did it make our list?
Lightweight and portable.
Great for disinfection and odor removal.
dison Mini Ozone Generator – Best Portable Model
Output: 50 mg/hr
Coverage area: smaller areas
Dimensions: φ72 x 2.79 in
Weight: 0.65 lbs
Warranty: 1-year limited
Other features: USB rechargeable, 2 working modes
Are you looking for a mini generator with a very cool design? The dison Portable Air Purifier – USB Rechargeable Mini Ozone Generator could be a great option if you just need something small that looks good for use in a tiny space. It is USB rechargeable and has 2 different modes so you can set it to the correct mode for your needs. It can still do a decent job of sterilizing and removing mold, but it has a 50 mg/hr output which is certainly not huge.
The design is tiny, and this is another reason a lot of people opt for the generator. It doesn’t take up much room in your home at all. It can also be used in a car or elsewhere in a portable way due to the tiny size and the fact it’s rechargeable.
This is also a pretty quiet model of generator, making it a good choice if that is a concern for you.
What we like: The rechargeable design makes it ultra-portable. Not everyone needs this but if you plan on using your ozone generator out and about or in a car then it can be a big help.
What could be better? It’s not very durable or built to last like the other products on the list. This is fine when you consider the price tag and what you are getting for the money.
What are our favorite features?
Easy to recharge via USB.
Great looking design.
Ivation Ozone Generator Air Purifier 300B – Best Design
Output: 360 mg/hr
Coverage area: 3500 sq ft
Dimensions: 12.5 x 11 x 15 in
Weight: 12 lbs
Warranty: 30-day limited
Other features: washable filter, cherry wood exterior material
The Ivation Ozone Generator Air Purifier, Ionizer & Deodorizer is a great air purifier and ozone machine with a fantastic design. It makes one of the best commercial ozone generators due to the fact that it can look good in pretty much any space and it has a big coverage area of 3,500 square ft.
Like some of the other models on the list, it boasts a washable filter which is a brilliant addition, and it should last you a long time. This is quite a big and hefty machine compared to some others, but it is better looking than most so you might not mind having it around the home. The 12 lb weight is also a bit of a downside for some people, but this is what you need if you are going to get a large coverage.
The output at 360 mg/hr could be higher for a big model, but it is still plenty for most people’s needs and the fact that there is a dial for the fan also helps.
What we like: The fantastic design which can sit innocuously in your apartment, or within a commercial setting.
What negatives must you be aware of? The output could be a bit higher especially when you consider the size of the product. It’s also quite large, which could be a downside for some.
Why are we impressed?
Suitable for large spaces.
Great design which looks good wherever you place it.
O3 Pure Professional Eco Laundry Washer System – Best for Water
Coverage area: n/a
Dimensions: 3 x 16.5 x 8 in
Weight: 6.6 lbs
Warranty: 3-year limited
Other features: CE and RoHS certified, template, mounting hardware, Phillips screwdriver, and an additional hose connector included, works with all washers High and Standard Efficiency, Top and Front Load
The O3 Pure Professional Eco Laundry Washer System is the best ozone generator for water, but keep in mind the fact that it can only be used for water and does not have the capacity to sit in a room and provide you with cleaner, sterilized air.
This comes with a CE and RoHS certificate to prove its safety, and has all the connectors you need to attach it to a washing machine whether front load or top load.
If you are looking to get a product that will last a long time, this ozone machine will probably do the job, and a 3-year limited warranty protects your purchase.
Installation is relatively straightforward for someone who is confident with this sort of job, but if you aren’t much of a DIYer then you might need to get a pro in to install it.
If you are looking for an ozone generator for hunting clothes or to get the odor out of clothes then this could be great for you.
What we like: Comes with safety certificates and is built to last a long time.
What cons did we manage to find? Installation is a bit of a big task for people who aren’t confident with this sort of thing, you can’t just put it in your room and turn it on, letting it do its thing like many of the other models on the list.
What stands out?
Comes with safety certification.
Connects to both top load and front load washers.
HERAVAC OG-75 Ozone Generator Machine – Best Coverage Area
Output: 7000 mg/hr
Coverage area: 5000 sq ft
Dimensions: 9.84 x 5.91 x 8.46 in
Weight: 3.72 lbs
Warranty: 3-year limited
Other features: 120-minute timer, fan delay button, CE, RoHS, and FCC certified
Looking for the best commercial ozone generator for mold and odor removal? Want something with a huge output and coverage so that you can put it to use even in huge spaces? The HERAVAC OG-75 Ozone Generator Machine might be your option, plus it even manages to do so with a relatively lightweight design.
This generator is CE, RoHS, and FCC certified, and it has a 3 year warranty, so you really don’t need to be concerned about whether it has the build-quality to suit your needs. It’s not overly large for the power and output it has.
A 5000 sq ft coverage area with a 7000mg/hr output is quite impressive. These features have made this design popular among people who need a commercial model for larger spaces. For example, if you offer cleaning services to other businesses.
Another design feature is the 120-minute timer and fan delay, this means that the fan won’t be running when you don’t need it to and that you can set a timer for the machine.
What we like: The huge power of this ozone generator is hard not to be impressed by, it is one of the best ozone generators for mold and other uses even though it might just be overkill for some people who need a smaller and less bulky model.
What could be better? We think that they could extend the warranty to five years to match some of the other models on the market. 3 years is fine for most people, though.
What are our favorite features?
Exceptionally powerful model.
Easy to use timer and fan delay.
Things to Consider
Whether you are in the market for the best ozone generator for grow room or you just want something to kill mold in the home or in your commercial business, we’ve got you covered with the best ozone machine reviews to allow you to make an informed decision. This is not the sort of product that people tend to buy all the time, so knowing exactly which features to look out for can be tough. Plus, there is a lot of rumour and speculation about the products and whether they are good for you or not, and whether they can be suitable for use in your home. Before you purchase an ozone generator for yourself, it is a good idea to take some time researching the product and whether it really is suitable for your home.
What is an ozone generator? Pros and cons
An ozone generator, quite simply, is a product to produce ozone, a chemical compound that many people know about because of the ozone layer. Ozone has many properties that can be helpful, whether using in a car, within the home or even within a business environment. The chemical compound can react with different substances and either get rid of them or make them harmless to humans. People have found that ozone generators are very helpful when it comes to cleansing both air and water.
Pros of ozone generators:
It can kill the mold in a room and make mold less hazardous to people.
It has the ability to neutralize smells, such as tobacco odors, this makes it a great choice during house clearances and the like, to prepare a home for another tenant.
It can purify the air and kill a lot of bacteria traveling in the air.
It provides a fresh smell.
Hunters can use ozone generators to reduce their body odor and be more successful.
It can hide smells from others, for instance if you want your grow room to avoid getting too smelly.
Cons of ozone generators:
They can potentially be hazardous. This needs to be fully understood before you use an ozone generator. Do not use one if it is going to cause any risk to your health. Ozone is an unstable compound and when it is reacting with other substances in the air it can also be reacting with your body. This is what makes it so essential that you only ever use the ozone generator when you are not in the room. This is why many have timers.
In some states, ozone generators are not legal. California, for example.
Features to consider when choosing an ozone generator
What are the features you need to think about before you decide on which ozone generator is ideal for you? There are certain features we’ve used to evaluate these products, which are all discussed within our ozone generator reviews. Some people will find that certain features and functions are more important to them than others.
Output and coverage area
Output refers to how much ozone is put out of the machine, usually measured in mg.
The more that the generator has the power to put out, the more effective it can be, but keep in mind that it may reach hazardous levels so it is vital to be careful when using it. Coverage area also refers to the size of rooms that ozone generators can fill with their particles.
If you are looking for something that can deal with huge spaces then try to match up the square footage with that advertised on the product listing. If you want to remove the tobacco smell from a car, for example, you can choose a small and portable model such as the dison Mini Ozone Generator and it will do a very good job.
How much power is the ozone generator going to draw to do its job? Do you need to consider certain aspects of power and whether you have the right power supply? The dison Mini Ozone Generator is an example of a USB chargeable ozone generator but most will need some sort of power from your home or garage.
Noise level is definitely a consideration when it comes to buying an ozone generator. Like most appliances, you don’t want it to be too loud during use. However, there is a key difference when buying an ozone generator as you won’t be in the room with it while it is running. This means that you can buy something with a low noise level if you want, but it doesn’t have to be super low so that you can watch TV at the same time. If you are looking for a specifically quiet model then the Airthereal MA10K-PRO Ozone Generator comes with our top recommendation. It’s super quiet but still manages to be powerful enough for handling most spaces in the home or in a business environment.
You need to consider the dimensions of your ozone generator for a few different reasons. Firstly, the fact that it will have to fit inside the storage space that you have allocated, and secondly, the fact that it will need to be put to use within a room, meaning that if it is too big and bulky then it might not be quite as easy to use. It isn’t the top consideration for everyone, but it is worth thinking about when you are choosing an ozone generator.
Warranty is an important feature and one which varies an incredible amount depending on which model you opt for.
Some of the very best ozone generator models can give a five-year warranty, safe in the knowledge that they will be able to claim if something should go wrong in this time.
Other products like the Ivation Ozone Generator Air Purifier 300B are well-made, but don’t come with a warranty to back it up. This product has a warranty of just 30 days. Ideally, you want to get at least one year of protection when you buy an ozone generator.
Price is another aspect that can vary hugely. When you buy an ozone generator that is small and portable then it might cost just $30 or so. If you want the best commercial ozone generator models then prepare to pay significantly more. There are many good products between the $100 and $200 mark, so they aren’t the most expensive product out there especially if you consider how many years of usage you might be able to get out of one. It might last you for a number of years.
A lot of the other features regarding ozone generators relate to both usage and safety. Many have dials and controls that are easy to use and control the timing of the unit as well as the output.
As you will want to be out of the room or the car while this is doing its thing, it makes sense to have a timer, and most of the ozone generators offer timers and delays. These can also ensure that the generator doesn’t keep running for a long time after you need it to, which can cost you in power but also reduce the lifespan of your ozone machine.
Safety features and certification are another area that some of the manufacturers focus on, and if you can find something that has a safety certificate then you can count this as a big plus point. Safety certifications are offered by unbiased and impartial companies who have checked that the product can stand up to rigorous tests and will not leak ozone when you don’t want it to, as this can be very dangerous.
Laundry systems need their own specific mention. The O3 Pure Professional Eco Laundry Washer System allows you to wash clothes with ozone and this can eliminate them of odors. It is also very good for cleaning clothes in a hotel environment, for example, ready for the next guests and a sterilized and safe stay.
Ozone generators installation, correct use and maintenance tips
As we’ve stated multiple times, safety needs to be the number one consideration when it comes to using an ozone generator. The correct use of the product is when nobody is in the home or when you can stay well clear of a space that is being “blasted” by ozone.
Ozone can be used when there is a sewage backup or something that causes significant odors, or if there are issues with mold. Usually, a cleaning company or specialist ozone cleaner will come in to give the treatment to the home. After it has been used, the home needs to be adequately aired so that the ozone does not remain at high enough levels to cause harm. Think of it a bit like bug-bombing a home to get rid of the pesky creatures, except this is for smells and mold.
In terms of installation, most ozone generators on the list just need to plug in and start working. However, ensure that you adequately read through all of the instructions you receive with the product. Otherwise, you might be making an error when it comes to using the ozone generator, and as we’ve established this can be hazardous. Work out the timing functions so that you can set it on a timer and remove yourself from the area. If you are using within a car then it is even more important to be extremely cautious.
To properly maintain your ozone generator, make sure you follow all of the instructions that are issued by the manufacturer. These will give you advice on storage, usage times and more. The products with certification are the most likely to take into account all of the maintenance tips to keep you healthiest.
Ozone generators can have filters within and some of these can be cleaned. The Alpine Air Commercial Ozone Generator is a good example of this and the ozone layers can be taken out in as little as 15 seconds. You might need to wear specific professional equipment when you are cleaning out an ozone generator.
Store your ozone generator away from an area where it could cause hazard if it was accidentally turned on. Also, if you are concerned, you should use protective equipment and even get an ozone monitor to tell you the levels of ozone that are in a specific space. Check that they don’t get to a level where they are hazardously high at any stage.
There is quite a lot of debate regarding ozone generators and what they are good for, or whether they even work adequately! Did you know that ozone itself is actually invisible so it is hard to track and monitor. This is why you can buy separate ozone monitors to help with this.
When it comes to debates regarding the effectiveness of using this sort of technology, some people argue that ozone is not very helpful. The truth is that the levels of ozone required to clear the air and have an impact on mold and smells is quite high, which means a professional job is required and that safety should be paramount. Often, the smell of a space can drastically change when it has been treated with ozone so this allows people to tell whether or not it has been effective.
Safety features vary by model. The timer is usually one of the more important features for ensuring that you stay safe during use. You can leave the room and allow the machine to do its thing effectively. Safety switches and child locks are some of the other effective features for safety. The HERAVAC OG-75 Ozone Generator Machine has a child lock meaning that it is tough for children to turn on inadvertently. Naturally, we can’t stress enough that the ozone generators on the market are not for use indoors while you are in the room! It is very dangerous to use a generator in this way as ozone can be damaging to your health. Most of the products will have some safety features to ensure that you have adequate tools to use the generator. If you are unsure, don’t take any risks.
Ozone generators can be great for hunters. Animals have an incredible sense of smell and this might mean that they struggle to stay anonymous and hide from animals due to the fact they can sniff them out, or smell their clothes. Cleaning clothes in water that has been treated with ozone can be a way to avoid this from happening. It takes away a lot of the body odor and means it is much harder for any animal to sniff out a potential hunter.
The Enerzen Commercial Ozone Generator is our very top-rated product. It has a rating of 9.9 overall and the only real problem with it is that the warranty isn’t the longest. It’s powerful, and great for large spaces, as well as being relatively quiet and easy to use. The price is also extremely reasonable when you compare the features with a lot of the other brands on the market.
Next up on our list of the best ozone generator models is the Alpine Air Commercial Ozone Generator with a rating of 9.8. It is similar to the Enerzen in many ways but the quick-remove filters makes this a fantastic choice for people who want to do their own maintenance. Due to these added extras we’ve named this the best option for value.
A budget pick for you is the Airthereal B50 Mini Ozone Generator, it’s miniature in its design and suitable for small spaces such as using in closets to remove the smell on some clothes. If you are looking for big and bulky this isn’t for you, but for use in a small bedroom or to remove the smell of a pet, for instance, this can be a great choice. We’ve given it a rating of 9.7/10.