The Best Ozone Generators - Top Picks by Bob Vila

Oct 30, 2024

By Tony Carrick

Updated on Apr 10, 2023 5:55 PM EDT

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When standard household cleaners won’t improve air quality, it’s time to bring in the big guns with the power of an ozone generator. Ozone attacks bad odors and air pollutants like cigarette smoke and pet smells at the molecular level, adding an extra oxygen atom to the odor molecule, changing its composition and eliminating the odor.

These powerful devices kill harmful bacteria and viruses, making them a high-tech cleaning solution for homes, offices, and commercial settings. Read on to learn about features shoppers will want to consider when browsing for the best ozone generator and discover some of the top options available.

We researched the most sought-after ozone generators in their respective categories and discovered that the best models are determined by their type, ozone production levels, size and weight, and special features included by select brands.

While searching for the best ozone generators available, the cold plasma options proved to be the most popular for their ease of use and effectiveness. Though not as popular, the ultraviolet option included is also a viable option for its high ozone emission and allergy-control capabilities. No matter the type, our picks list features options with 50 to 20,000 milligrams per hour (mg/hr) ozone emission levels depending upon the space and preference.

The vast majority of our picks are also compact and lightweight enough to be transported or moved from room to room. Finally, in the interest of choosing the best options on the market, our picks also come with built-in timers, multiple ozone output and fan levels, handles, and long runtimes of up to 3 hours.

Before users go reaching for the air freshener, the following products are among some of the best ozone generators for cleaning and sanitizing the air in a home and are safe to operate when used as directed. Remember: Never run an ozone generator in an occupied room.

With its small size and extensive coverage area, this ozone generator is an excellent option for the home or office. It can generate 11,000 mg/hr, making it suitable for larger spaces up to 2,000 square feet. It features ceramic ozone plates that last longer than standard metal ones and a stainless steel filter that is easy to remove and clean.

At just 6.75 inches long by 8 inches wide by 5.75 inches tall, this unit is small and discreet. Because it weighs just 5 pounds and has a folding handle, users can carry it easily from room to room. A timer allows the user to set treatment cycles of up to 3 hours long. The Enerzen is housed in a durable aluminum casing.

Get the Enerzen commercial ozone generator at Amazon.

With its innovative design and low price, this is a great budget ozone generator. Despite its small size—it is just 10.6 inches long by 7.4 inches wide and weighs 1.5 pounds—this generator puts out an impressive 600 mg/hr, which is enough to clean a small room. It emits ozone through two flexible silicone tubes or two diffuser stones, which can be placed in water or on objects to remove odor.

With these attachments, this ozone generator enables users to freshen and deodorize small rooms, drinking water, fruits and vegetables, and more. A timer allows users to run this unit for up to 30 minutes, and an LCD display makes viewing and controlling the unit easy. This ozone generator also comes with brackets so it can be mounted to the wall.

Get the Ivation ozone generator at Amazon or Target.

This triple-threat model from Green Air purifies the air in a home in three different ways: Its ultraviolet (UV)-light ozone generator eliminates odors, its carbon filter removes allergens, and its ionization function zaps dust particles out of the air.

With a large fan and high output, this UV light-powered unit can handle spaces of up to 3,500 square feet. It includes a remote control for convenient operation and has a built-in timer.

At 11.25 inches long by 12.25 inches wide by 15.5 inches high and weighing 12 pounds, this generator is on the larger side. However, its sleek design makes it an attractive addition to a room. Keep in mind that its ionization and filtering functions, though useful, make this one of the more expensive ozone generators.

Get the Green Air ozone generator at Amazon.

Drive odors from a home with this powerful ozone generator from OdorStop. It features a powerful 600 mg/hr output and 110-cubic-feet-per-minute fan, making this unit capable of treating a 1,500-square-foot space. Users can customize its on-and-off times by programming the 12-hour timer and twisting the control knob to set the output between 50 and 600 mg/hr.

This rugged generator features aluminum construction and a design that allows users to slide out the ozone plates easily to clean them without disassembling the unit. At 9 inches long by 12.5 inches wide by 7.5 inches high, this air purifier doesn’t take up much space. It weighs just shy of 10 pounds, so it’s easy to move from room to room.

Get the OdorStop OS1500 air purifier at Amazon.

Remove odors from a home with the OdorStop OS900/6G professional-grade ozone generator. Suitable for spaces of 900 square feet or less, this ozone generator is appropriate for RVs, bedrooms, nurseries, boats, offices, and hotel rooms. It emits 400 mg/hr, weighs just 6 pounds, and is 7 inches long by 9 inches wide by 6 inches high.

While it only has one ozone treatment level to emit, it has a sturdy aluminum construction and a built-in 2-hour timer. For added convenience, this ozone generator also has a replaceable filter, an 80-cubic-feet-per-minute fan, a built-in handle, and it requires no assembly before use.

Get the OdorStop OS900 ozone generator at Amazon or Wayfair.

For large spaces, a few hundred or even a few thousand milligrams per hour of ozone output isn’t going to cut it. Users need a bigger ozone generator. With an output of 10,000 mg/hr, this model from Airthereal packs plenty of odor-removing punch to handle commercial spaces up to 2,000 square feet. This unit features a 12/24-hour cycle mode that activates the generator at a set time each day, eliminating the need to set the generator daily.

The Airthereal has five ozone-production levels, and a five-speed fan enables users to control the ozone distribution. This unit is 9.3 inches long by 7.1 inches wide by 6.8 inches high, weighs less than 7 pounds, and has an easy-to-read LCD display. With its 304-grade stainless steel construction and rugged handle, this unit can endure being moved around a lot.

Get the Airthereal PRODIGI ozone generator at Amazon or The Home Depot.

When users need to remove odor from a large space, they could benefit from some extra muscle from an ozone generator. The Enerzen O-888 ozone generator covers more than 4,000 square feet with its powerful 20,000 mg/hr ozone output level. Users can adjust the fan speed to create a “pulsating” effect for musty or strong odors.

It also has a built-in timer for up to 3 hours of operation, and users can add another 30 minutes for additional odor-removal. Finally, this generator is only 5 pounds and has a built-in handle for added portability. Its dimensions are 6.75 inches long by 8 inches wide by 5.75 inches high.

Get the Enerzen O-888 ozone generator at Amazon.

Cars have a tendency to trap dirt and dust in their carpeting and upholstery, making them havens for nasty smells that are notoriously difficult to eliminate. When that pine tree air freshener hanging from the rearview mirror isn’t up to the task, call for reinforcements. With its 6,000 mg/hr ozone gas output, this ozone generator from Alpine Air can put an end to offending odors in just a couple of hours.

Weighing just 6 pounds and measuring 11 inches long by 9.7 inches wide by 8.5 inches high, this unit fits easily into a car. It features a 2-hour timer, which helps users eradicate lingering odors from the fast-food trash that’s been sitting in the back seat for weeks. A quick-access slot allows users to remove and clean the ceramic ozone plate quickly and easily, and an ergonomic foldable handle makes it easy to carry.

Get the Alpine Air ozone generator at Amazon.

For pet smells, cigarette smoke, cooking odors, and any other unpleasant smells, rely on the Airthereal MA5000 commercial ozone generator. Suitable for spaces of up to 2,000 square feet, it can be ideal for use in a home, commercial space, and even a vehicle. The built-in timer knob allows for up to 120 minutes of runtime, and the integrated “hold” setting allows for continuous usage for really thick or musty smells.

Simply place the 3.5-pound model where desired using the convenient carrying handle, leave it on for the required amount of time, and come back 30 minutes after the cycle time has ended. This model is capable of producing 5,000 mg/hour, which kills 99 percent of bacteria in a room or space. Plus, this highly portable ozone generator has been tested and verified by a third party for reliability and effectiveness.

Get the Airthereal MA5000 ozone generator at Amazon or The Home Depot.

Purifying drinking water helps to improve the overall health of the drinker. Those looking to remove bacteria, odor, and bad taste from their water can rely on the Airthereal portable ozone machine. This handy gadget can clean water, fruits, vegetables, utensils, and toys in kitchens, bathrooms, and laundry rooms with its 1,000 mg/hour ozone output.

This product comes with the ozone machine, a tube, and diffuser stones for effective use. It releases negatively charged ions for a period of 5 to 60 minutes, which can be adjusted with the built-in timer. Plus, this model could be mounted to a wall for continuous or frequent use.

Get the Airthereal portable ozone generator at Amazon.

Before users go shopping for air fresheners for the car, bedroom, and/or living room, they might want to look into purchasing the right ozone generator, which can help the air quality of a home or office. It’s important to understand ozone control and how to operate these machines safely. Read on to learn about the size, output, and features of ozone generators.

Not all ozone generators are right for all uses. Some rely on UV energy to generate ozone, while others rely on plasma or oxygen molecules. Still, there are also models used for treating water. While each of the options is effective at creating ozone, one type may be better than others for an intended use.

Ultraviolet ozone generators are the least expensive, and least efficient, type. They produce ozone by splitting oxygen molecules with UV light. These units take comparatively more time and power to create a relatively small amount of ozone. This makes them unsuitable for larger spaces but good options for small offices, bedrooms, and hotel rooms.

Despite their unfortunate name, corona-discharge ozone generators are quite powerful. They operate in much the same way as lightning, which splits oxygen molecules with an electric current to create ozone. A corona-discharge ozone generator works by creating an electric field on a surface that splits the oxygen molecules in the room into single atoms, which instantly recombine to produce ozone gas.

Corona-discharge ozone generator models are potent and efficient, making them ideal for large environments. The downside is that it creates a significant amount of heat because it requires a lot of energy to create a powerful electric current.

Whereas corona discharge uses an electrical current and ultraviolet uses UV rays, this type of ozone generator splits oxygen atoms using cold plasma created from two neon tubes that are adjacent to each other in a sealed chamber. An electrode electrifies the chamber, creating an electric field between the two tubes.

Like a corona discharge generator, this electric field splits the oxygen atoms, which recombine to create ozone gas. Unlike corona discharge generators, cold plasma generators create very little heat but produce about the same amount of ozone gas. However, these units are bulky and significantly more expensive than other ozone generators.

This type of ozone generator is used for water treatment. Water pumps into the ozone generator, which splits the oxygen molecules in water to create ozone. Unlike chemical treatments, which remain in the water, ozone water treatment dissipates into oxygen, leaving no harmful residue.

Except for large ozone generators that are used in industrial settings, ozone generators are generally small. Most weigh less than 7 pounds (some weigh as little as 7 ounces) and range in size from that of a wallet to a toaster.

Their compact size allows them to fit discreetly in most rooms and even function in smaller spaces such as car interiors. Ozone generators’ small profile means they’re also portable and are easily moved from room to room. Some people travel with them, too; they come in handy if users are on a business trip and end up in a foul-smelling hotel suite.

Ozone output is measured in milligrams per hour. The higher the output, the larger the space the generator can treat. A quality ozone generator will produce at least 350 mg of ozone per hour, with some industrial-size ozone generators pumping out as much as 12,000 mg/hr.

Lower-output generators are suitable for offices, individual rooms, and other smaller spaces. Commercial settings, such as hotel lobbies, require much larger generators to be effective. Users can also use larger-output generators for a short time in a smaller space to “shock” the area, sanitizing an entire room in less than an hour.

Most ozone generators have a host of features that make operating them safer and easier. An ozone generator should have an output control and a fan that distributes the ozone gas throughout a space.

It should also have a timer that enables users to control when the generator turns on and off. Some units have remote controls that allow the user to operate the generator from afar. Multifunction ozone generators have filters for removing dust and allergens from the air.

Portable ozone generators are convenient for home or travel. These small units weigh as little as 7 ounces, with some not much bigger than a smartphone. They are compact, feature ergonomic handles, and can be plugged into standard 115-volt outlets. Portable generators are easily moved around to different rooms in a home or can be used in hotel rooms.

Like many appliances, ozone generators can present serious health risks if they are misused. Ozone gas is a pollutant that is harmful to human health. Exposure to ozone can result in chest pain, coughing, shortness of breath, and throat irritation. Ozone can also worsen asthma and respiratory infections.

The health risks ozone generators can pose are why it’s essential that users operate them when there is no one around, including pets. Ozone generators have timers so users can program them to turn on and off at specified times, which prevents them from having to reenter the space to shut off the unit manually.

After an ozone generator finishes its cycle, it’s important to wait until the ozone dissipates before reentering the space. This usually takes about an hour.

To maintain an ozone generator, users need to clean the ozone plates periodically. Most ozone generators are designed so that users can easily remove the plate or plates inside the unit. By cleaning the plates regularly, users will both ensure the generator operates at peak performance and extend the lifespan of its plates.

There are many benefits to having an ozone generator in a home. Ozone can quickly break down odors and kill mold and mildew, making it effective at deodorizing basements, bedrooms, kitchens, and bathrooms.

An ozone generator can purify and deodorize drinking water and freshen food, helping to stave off spoilage. These powerful machines can also be used to kill harmful bacteria and viruses.

If you’re unsure about the difference between an ozone generator and an air purifier or what to do when operating ozone generator models, read on for answers to those questions and more.

An ozone generator creates and releases ozone gas. Ozone sanitizes and cleans the air and objects around it. In comparison, an air purifier uses a filter that traps allergens, pollutants, and other substances before returning the air to the room.

It is totally safe to use an ozone generator at home. However, please be advised that all pets, children and adults, and plants should be removed from your space before turning your ozone generator on.

To use an ozone generator safely, run it only when the space is unoccupied. Purchase only an ozone generator that has a timer that will shut it off automatically. Ozone needs time to dissipate, so wait 1 hour after the generator has shut off before reentering the space.

As a rule of thumb, an ozone generator should run for 3 to 10 hours to ensure it properly removes odors. To ensure you are using your ozone generator for the correct amount of time, consider an air-quality monitor that measures ozone levels in your home.

The average lifespan of an ozone generator is about 3 years. Its lifespan largely depends on how often you use it and how regularly you clean the ozone plates.

Contributing Writer

Tony Carrick is a freelance writer who has contributed to BobVila.com since 2020. He writes how-to articles and product reviews in the areas of lawn and garden, home maintenance, home improvement, auto maintenance, housewares, and technology.

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