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ozone machines reviews

Best Ozone Generators For Home, Commercial Use & Cars

Shopping for an Ozone Generator?

You’ve come to the right place.

The best ozone generators allow you to enjoy a cleaner, fresher and healthier indoor environment in your house, car, or just about anywhere.

While many of you might be concerned about the harmful effects of ozone generators, we are here to clear up the air - pun intended.

Ozone generators are highly efficient at killing microbes, removing odors, and just improving the overall air quality. The harmful effects typically under discussion take place after prolonged and consistent exposure.

If you follow the instructions and use them with proper care and caution, you should be able to enjoy the benefits of ozone generators without putting yourself at risk.

What's In This Buying Guide

This buying guide lists and compares some of the best ozone generators for home, cars, and commercial use. We review them in detail and list all their pros and cons so that you can choose the best ozone generator for yourself and that too, quickly and easily.

To further help you narrow down options, we list the features you need to look for when buying an ozone generator.

Lastly, we answer some common questions about ozone generators to clear up any remaining doubts.  

Best Ozone Generators

  1. 1
    Best for Home Use: Airthereal MA10K PRO
  2. 2
    Best Commercial: OdorFree Estate 4000
  3. 3
    Best for Cars: Mammoth 7000mg 

ozone machines for home use
  • Airthereal MA10K PRO

  • Best for Home Use
  • Coverage Area
    2000 sq. ft.

  • Ozone Output
    10,000 mg/hr.

  • Warranty
    3 Years

  • Weight
    6.6 lb.

ozone machines for home use
  • OdorFree Estate 4000

  • Best Commercial
  • Coverage Area
    4000 sq. ft.

  • Ozone Output
    150 mg/hr. to 2800 mg/hr.

  • Warranty
    5 Years

  • Weight
    11.97 lb.

ozone machines for home use
  • Mammoth 7000mg

  • Best for Cars
  • Coverage Area
    3500 sq. ft.

  • Ozone Output
    7000 mg/hr.

  • Warranty
    1-year limited warranty 30-day return policy

  • Weight
    9.35 lb.

1. Best for Home Use: Airthereal MA10K PRO

best ozone generators

The Airthereal MA10K PRO is massive and powerful. Its honeycomb ozone plate generates ozone at a maximum of 10,000 mg/hr. It has a huge coverage area of 2000 square feet and an extensive service life of 20,000 working hours.

And it does all of that while creating less than 45 dB of noise, making it ideal for maintaining a peaceful home environment. Plus, it gets rid of quite a few odors and VOCs and leaves the room feeling healthier and fresher.


  • Weather-resistant
  • Features a timer for user convenient
  • Easy to move around due to the handle at the top
  • Purification efficiency is 50% more than a typical ozone plate
  • Comes with a 3-year warranty 


  • Not suitable for larger spaces

Our Review

One of the most distinguishing features of the Airthereal MA10K PRO is its honeycomb ozone plate.

It produces a powerful ozone output of 10,000mg/hour, allowing for a more uniform and steady ozone output. This feature also increases the purification efficiency of the MA10K Pro by 50% compared to an ordinary ozone plate.

You also get a robust ball-bearing fan that works faster than an ordinary fan, allowing it to carry out the purification process much quicker.

For instance, the Airthereal MA10K PRO cleans an average-sized living room in less than 30 minutes. To be more specific, the MA10K Pro cleans 150 square feet in 10 minutes or more than 6 times in only one hour.

If you don’t want the maximum ozone output, you can choose the ozone production level from five different settings: 2g, 4g, 6g, 8g, or 10g per hour. You can also choose from 5 different fan speed settings, allowing you full control of the unit’s operation.

The MA10K Pro has a massive coverage area of 2000 square feet, so you can use it in large halls, schools, offices, or other open spaces.

It neutralizes and removes smoke odors and smells emanating from pets or cooking, etc. This makes it great for domestic purposes, hotels and restaurants, vehicles, and even pet shops.

You can also trust the MA10K Pro to fight mold growth and spores in your house. It doesn’t just eliminate surface mold, but it prevents mold spores from spreading and growing inside. Plus, it gets rid of VOCs, too.

The Airthereal purifier also has an impeccable service life of 20,000 working hours, so it will last you for a long time.

The machine also has a timer knob. You can control for how long you want the unit to run depending on your room's air quality, and of course, its size.

If you cannot decide on a time, it’s best to start with 15 minutes. You can then increase it as necessary. This allows you to save electricity costs too as the machine won't run indefinitely.

But remember that you should use this in an unoccupied room. In fact, to make sure people don’t enter the room while the machine is working, it comes with a ‘NO ENTRY’ sign that you can hang on the door to serve as a warning.


Ozone Output: 10,000mg/h

Air Flow: 120 CFM

Applicable Area: 2,000 sq ft

Noise Level: <45 dB

Material: Stainless Steel

Timer: 2 hours

Weight: 6.6 lbs (3 kg)

Dimensions (LxWxH): 9.3 × 7.1 × 6.8 inches (23.7 x 18 x 17.5 cm)

Power Consumption (US): 110V 60 Hz

Warranty: 3 years

2. Best Commercial: OdorFree Estate 4000

best home ozone generator

The OdorFree Estate 4000 has a huge coverage area of 4000 square feet and a maximum ozone output of 2800mg/hour, so it can clean up a huge space in little time. It also comes with a timer and a 5-year warranty.


  • Can be used in large spaces like hotels, bars, condos, etc.
  • Features a 1- to 12-hour timer
  • Gets rid of odors like cigarettes, fire damage, pet, water damage, chemical, etc.
  • 4 easy-to-clean ceramic plates
  • Comes with a 5-year warranty


  • Ozone smell can be strong on the first use

Our Review

The working mechanism of the Estate 4000 is pretty simple. The machine takes oxygen (O2) from the room, transforms it into ozone (O3), and spreads it around the room.

The Estate 4000 also serves as a very strong and powerful oxidizer that helps to break down odor molecules responsible for creating an unpleasant environment. It also removes and eliminates these odors from their very source.

The Estate 4000 has a large coverage area of 4000 square feet, making it suitable for schools, offices, restaurants, motels, bars, basements, etc.

The ozone generator’s ozone output is also pretty impressive and ranges from 150 to 2800 mg/hr. This means you can rely on it to clean a large room in a relatively short time. Plus, you can control the ozone output as per your preference and requirements.

It also comes with four ceramic plates and filters that are easy to clean and maintain. They are easy to take out and clean.

The Estate 4000 also features a timer for 1 to 12 hours. This will help you in saving energy and, in turn, precious money from your utility bill.

Lastly, this product comes with a five years warranty.


Type of Space: Large Spaces-Strongest Odors

Square Footage: Up to 4000 Sq Ft

Built-In Timer: 1 to 12-Hour Timer

Continuous hold setting

Adjustable ozone output

Product Dimensions: 15.2 x 13.07 x 11.57 inches

Weight: 11.97 pounds

3. Best for Cars: Mammoth 7000mg

best home ozone generator

Looking for something small, easy to carry, yet incredibly powerful? The Mammoth 7000mg Ozone Generator is the perfect solution.

It is suitable for areas up to 3500 square feet and has a service life of 6000 working hours and an ozone output of 7000 mg/hr.

And it comes with a timer and a one-year warranty. Plus, its compact dimensions make it ideal for cars.


  • Features a compact design
  • Powerful ozone output of 7000 mg/hr.
  • Very easy to use
  • Reinforced handle makes it easy to move around
  • Comes with a one-year factory warranty


  • The dial breaks off easily

Our Review

Despite the small size, the Mammoth 7000mg is a powerful device. It produces 7000 mg of ozone per hour in a 1000 square feet room.

The Mammoth 7000mg is very portable and has sturdy low-profile handles that make it easy to move. It is also very easy to use.

Just turn on the dial located at the front and select how long you want it to run. But if you're going to keep the machine running continuously, you can just choose the ‘Hold’ position.

The Mammoth 7000mg features an extra-large fan that cleans the air rather quickly, so you don’t have to keep it running for too long, especially in a car. In fact, it takes less than 5 minutes to purify 300 square feet.

The fan helps eliminate odors like paint fumes, domestic odors from cooking, and cigarette smoke. It purifies 1000 square feet in 15 minutes only.

The ozone plates are pretty solid, too, and have a service life of 6000 working hours, so you don’t have to worry about replacing them often. Cleaning and maintaining them is also pretty easy. Even the metallic pre-filter is washable.

The Mammoth 7000mg features a 1-year warranty and a 30-day replacement policy. Plus, if you ever need assistance, the manufacturer also provides around-the-clock telephone customer support service.


Max Coverage: 3500 sq./ft.

Variable Ozone Output: 7,000 mg/hr.

Power Consumption: 55 watts

Weight: 9.35 lbs

Timer: Yes

Product Dimensions: 10 x 7.75 x 8.5 inches

Warranty: 30-day replacement warranty – 1-year limited warranty

Ozone Generator: Buying Guide

What Is an Ozone Generator - and How Does It Work?

best ozone generator for home use

As the name suggests, an ozone generator produces ozone. Ozone has sterilization properties and helps kill microbes and gets rid of unwanted and nasty odors. You can use them in domestic or commercial places.

Even though ozone generators serve as home air purifiers, many hospitals and warehouses also use them because of their outstanding sterilization capabilities.

But remember, you need to take particular caution when using an ozone generator indoors.

Ozone can have adverse effects on your health, especially after prolonged exposure. This is why all the products we review above state that you should only use these devices in uninhabited spaces.

Ozone generators usually also include an air dryer, dust filters, a torch destructor, and a contact unit and require an oxygen source in order to provide a steady stream of clean and pleasant ozone into the designated area room.

The ozone generator generates an electrical discharge akin to lighting. This charge then hits the oxygen molecule (O2) and splits it into two oxygen atoms. These atoms then join another O2 molecule and create the ozone molecule, O3.

This ozone then circulates the room, usually with the help of a fan.

Types of Ozone Generators

best ozone generators

The market for ozone generators is very diverse. You have a lot of options and various types available. Some common types include:


An Electrolytic Ozone Generator (EOG) works with electrolytic technology. It produces extremely concentrated ozone water and pure hydrogen.

This ozone water kills off microbes like bacteria and viruses but doesn’t have any detrimental effects on human health. This technique is safe as it doesn’t create any toxins like Nitrogen Oxide that can be bad for both humans and the environment.

An EOG only produces two by-products, water and hydrogen, so it is deemed user-friendly and safe.

This technology is usually present in commercial units.

Cold Plasma

Cold plasma is a partially ionized gas produced at room temperatures or a little lower than that. The gas, in this case, is oxygen, and its ionization happens between two electrodes with an insulating barrier right in the middle separating the two.

Upon the formation of plasma, oxygen molecules split and form two single oxygen atoms. These then combine again with O2 and form O3 (ozone).

Cold plasma units use oxygen as the primary input source, and the ozone produced has a 5-7% concentration.

However, these units are expensive, which is why they’re not so common for household use.

Corona Discharge

As far as industrial usage is concerned, most units feature a corona discharge mechanism. Air is blown and channeled into a corona discharge tube, where it is exposed to a strong electrical field that produces plasma.

This plasma splits oxygen molecules into oxygen atoms that attach themselves to an oxygen molecule to produce ozone.

Corona discharge differs from the cold plasma method in terms of the fed gas they use and the mechanism used to produce plasma. A corona discharge generator also produces nitrogen oxides that react with water and form rather corrosive nitric acid.

Ultraviolet Radiation

In this mechanism, UV light between 100 nm and 240 nm is used. This is typically achieved with a low-pressure, shortwave UV lamp that produces two peaks at 185 nm and 254 nm. The former serves as a germicidal lamp, whereas the latter is termed the ‘ozone producing’ lamp.

Other components of UV radiation ozone lamps are a Ballast or transformer to provide power to the lamp and a fan or air pump to circulate the air inside the generator.

The UV lamp produces ozone using oxygen or just air. This lamp is situated in a chamber that exposes the gas to UV rays such that the lamp itself stays protected with a quartz tube.

Once the feed gas (air or oxygen) is exposed to the UV rays, it splits an oxygen molecule into oxygen atoms that produce ozone.

These machines don’t require any expensive components and have a simple mechanism, so they don’t cost too much. We recommend this for users on a tight budget.

Why Buy an Ozone Generator?

best ozone generator for home use

Ozone generators provide clean, fresh air. They play a vital role in improving indoor air.

For people that live in large, crowded cities, investing in an ozone generator is crucial. We live in the industrialization age where fumes from cars, factories, and just the city life populate the air immensely. This is why an ozone generator is essential.

Ozone generators are air filters that use ozone to deliver fresh air, which isn’t just beneficial for your health but it also significantly improves mood and helps you sleep better.

Life in big cities can be fast, and people often get lost in their work. This contributes to stress, unhealthy eating habits, and disturbed sleeping patterns. Taking small steps to improve your quality of life can pay off massively in the long term.

What to Look for in an Ozone Generator

best ozone generators

Ozone generators are available at various prices, work capacity, and performance. To make sure you buy the most efficient ozone generator, here are some factors to look for:

Ozone Output

The main feature to look for in ozone generators is the ozone output per hour. The higher the ozone output, the less time it takes to kill bacteria and freshen the air.

It’s important to note that it's probably not very impressive if a manufacturer does not state its ozone output.


In terms of operation, ozone generators are very different from air purifiers.

They do not take in air and filter it to produce fresh air; instead, they release a chemical into the air that kills harmful bacteria they come into contact with. This is why it is ideal to purchase a unit that includes a timer.

It can be dangerous to stay in the same room as an ozone generator. This is where the timer comes in handy.


As stated earlier, an ozone generator does not take in air to filter but uses a fan.

The stronger the fan, the more area it can cover. A unit with a smaller fan can work for people who reside in smaller living spaces and vice versa.

Charcoal Filter

Some ozone generators use a charcoal filter to trap dust particles and other pollutants. This helps clean the air at a much faster rate. Ozone generators that include a filter also serve as air purifiers.


Air ionizers or ionic air purifiers work to remove harmful air pollutants such as dust and pollen from the air.

This allows the ozone generator to run without continuously producing ozone. You can also use the ionizer independently or simultaneously, depending on your requirement.

HEPA Filter

Some ozone generators include a HEPA filter to trap airborne pollutants like allergens, dust, and mold spores. You will also notice many air purifiers equipped with a HEPA filter because of their superior performance.

How to Use an Ozone Generator

Although operating an ozone generator isn’t hard, it is crucial to learn how to use it safely. If you do not know how to use it safely, you could put your life as well as the lives of your loved ones at risk.

It is crucial to get any living thing out of the room before turning on the unit. This includes not just you and your pet but also any plants that you might have in the room.

Additionally, some materials like plastic, rubber, and certain metals are also at the risk of being damaged. Lastly, make sure not to enter the room for an hour or two after the machine stops working and ozone levels drop.

Pros and Cons of Ozone Generator

best home ozone generator

While the best home ozone generator drastically improves indoor air quality, there are some limitations you should be aware of.


The most apparent advantage of an ozone generator is how well it cleans the air. Ozone is especially great for sanitizing the air as it kills airborne viruses, bacteria, and fungi. Ozone generators also eliminate nasty odors, clean up VOCs, and inhibit mold growth.

Ozone generators are also pretty efficient and fast. They target a huge range of bacteria and terminate them at a rate that is actually 3000 times faster than chlorine and is 50 times more powerful.

This means you don’t have to run them for too long, so they don’t add too much to your energy bill.


Prolonged exposure to ozone is harmful to humans, animals, and even the environment. This doesn’t mean you can’t use them; it just means you have to use them with caution.

Using an ozone generator can also be inconvenient because you can only use the device in an empty room and wait for the ozone levels to drop to enter the room again.

Care and Maintenance

Proper care and maintenance of your ozone generator are crucial if you want your device to last for long. Here are some tips to keep in mind:

Use a lightly damp cloth to wipe the dust off the machine’s exterior, followed by a dry, lint-free towel cloth.

Most units feature a removable filter. Unplug the machine, remove the filter and wash it with soap and water. This will get rid of accumulated debris and improve its performance. We recommend you wash the filter every 2-3 weeks.

Ozone plates are responsible for producing ozone and also need care. If the ozone smell is not as strong as it used to be, then it’s time to clean the plates.

Simply take out or unscrew the ceramic plates. Use a non-metallic brush or an old toothbrush dipped in alcohol or soap and water to scrub each plate clean.

Let it dry naturally, or you can use a hairdryer. If your plates are spring-loaded, use a Q-tip rubbed in alcohol to clean the contact part of the springs.

Frequently Asked Questions

Can an Ozone Generator be Lethal for Plants and Pets?

Theoretically, ozone can kill plants and pets, but it would take a very long time. If you take proper precautions, like removing the plants and pets from the room when the machine is on and not entering as soon as the machine powers off, then your plants and pets should remain safe.

What Is Meant by Ozone Shock Treatment?

Ozone shock treatment or ozone blasting refers to the process of eliminating nasty odors, mold, microbes, and vermin in both residential and commercial buildings.

This method is generally inexpensive than other options used to sterilize indoor spaces like removing and cleaning the building material or, if the situation demands, evacuating the building.

How long does ozone take to dissipate?

Once ozone carries out its germicidal and sterilization duties in a room, it converts back into oxygen. This can take anywhere between 30 minutes and 4 hours and depends on the levels of ozone present. Higher levels of ozone dissipate in 3-4 hours, but lower levels can take 1-2 hours.

Does Ozone Smell Fade Away with Time?

Absolutely! In the first few weeks, you might experience a faint ozone odor. However, most ozone generator reviews show that customers find the smell pleasant and fresh and associate it with nature. But this faint smell, too, quickly fades away within a short span.

Can an Ozone Generator Eliminate Cigarette Smoke?

An ozone generator oxidizes and produces ozone, which targets odors, including tobacco, at their source. It can also kill other odor-producing bacteria. But if cigarette smoke is your main concern, you should check out air purifiers that cater to cigarette smoke.

Final Verdict: What is the best ozone generator sold today?

After carefully going through all the different aspectsof various great performing ozone generators, we believe that the best ozone generator commercially available these days is the Airthereal MA10K PRO.

It is a beast with an ozone output of 10,000 mg/hr., a service life of 20,000 working hours, and a 2000 square feet coverage area.

The MA10K Pro comes with a 3-year warranty and produces less than 45 dB of noise. Plus, it is not too heavy (6.6 pounds) and comes with a handle for easy transportation.

About the Author Tom Hanson

I’ve worked as an HVAC tech in Phoenix, AZ for the past 10 years. I created to help home owners select the right portable air conditioner, cooler or air purifier for their needs & budget in just a few minutes.

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