Best Ozone Generators to Buy in 2020

Shop these top-rated ozone generators for mold remediation, odor removal and other home, commercial and industrial applications. Most generators come in a similar form factor: a box with a handle and a few control dials on it. Some larger, commercial grade units have wheels due to their cumbersome size and weight.

Evolution of Ozone Generator Technology

Generally speaking, all ozone generators draw air in one end, run that air through a chamber with ceramic ozone plates, and exhaust it back into the same area it was drawn from. Recently, newer units have incorporated charcoal filters and UV lights to provide additional air cleaning.

Ozone Generators and Use in Occupied Areas

Historically using an ozone generator in an occupied room was not advised. Recently advances in approaches to treating air have challenged that thinking. Newer models are now on the market that are designed to be used in occupied areas. There is a catch: while the area is occupied, the unit is not actively introducing ozone into the room.

Instead, these units move large volumes of air through them with the ozone generation turned off. How is the air being cleaned? The air is exposed to UV light and/or charcoal filtration. The unit’s ozone generation can simply be turned on when the room is unoccupied, again leveraging ozone generation. While a smart feature, at first glance this might seem to make these units’ names a bit misleading. In reality, this non-ozone operation makes these units far more versatile and useful.

All Around Winner: Best Ozone Generator

Don’t have time or want to read each ozone generator review? As far as identifying the best ozone generator for mold, bacteria or odors, we’re confident that it is manufactured by OdorStop. Which OdorStop is the best one depends up on the size of the job. Here’s our recommendations:

  • For commercial mold remediation and odor removal, the OS12500 is our recommended ozone generator.
  • For occupied spaces, choose one of the UV2 designated models from OdorStop, such as the OS4500UV2.
  • If you’re looking for a duct-mounted ozone generator, the OS500D is your only (and best) choice.
  • The best ozone generator for killing mold and odor removal under 3,500 sf is the OS3500UV2.
  • Our pick for deodorizing and sterilizing small rooms and vehicles, is the OS600UV.

Best Ozone Generator for Occupied Spaces – Ozone, Charcoal and UV.

OdorStop Ozone Generator with UV OS3500UV2

Best Ozone Generators - OdorStop OS3500UV2

As far as cleaning the air in occupied spaces, any OdorStop model that has a model number ending in UV2 is our pick. Which model you choose should be based upon the size of the area being treated. We’ve chose a mid-sized model, the OS3500UV2 below. Clicking through to check the price will bring you to a page with several UV2 models ranging from 600 sq. ft. to 6,500 sq. ft.

The OdorStop UV OS3500UV2 is the update to one of the most popular ozone generators OdorStop makes. Like all UV2 designated models, there’s three elements inside the unit that allow it to efficiently clean and deodorize the air. First, the unit has a trio of high-output ceramic ozone plates. Next, the unit has 2 germicidal UVC bulbs. Finally, a charcoal filter is present to remove odors and further purify the air.

The trio makes the unit not only a commercial grade ozone generator but also a UV air cleaner with charcoal odor control.

OdorStop says the unit excels at eliminating bacteria, odors and viruses. And, with its 3,500 square foot reach its suitable for deodorizing offices, homes, hotel rooms and rental properties. Finally, a standout feature is that the unit can be used in occupied spaces. That’s because the ozone generation can be turned off, allowing for cleaning the air with just the UVC bulbs and charcoal filter. We think this is a great addition, creating far more value than models lacking the dual-use each UV2 designated model carries. As mentioned earlier, larger models are available. Visit Amazon to see the full range of UV2 designated models.

In closing, we want to mention it one last time: Always refer to the user manual and the manufacturer’s safety precautions when using any ozone generator. No ozone generator should ever be used in an occupied space.

Latest Price and Promotions

  • Ozone Output: up to 3.5 g/h
  • Dimensions: 10″ x 9″ x 12″
  • Weight: 15 lb
  • Ozone Plates: 3 Plates
  • Treatment Area: Up to 3,500 sq. ft.
  • Warranty: 5 years

Top Pick: Industrial Mold and Odor Removal – Up to 6,000 sq. ft.

Airthereal MA10K-PRODIGI Digital Ozone Generator and Ionizer

Airthereal MA10K-PRODIGI Ozone Generator

The Airthereal MA10K-PRODIGI is one is the latest of Airthereal ozone generators and features a ceramic honeycomb plate that has an impressive 20,000 hour service life. The unit has variable ozone output of 2 g/h, 4 g/h, 6 g/h, 8 g/h and the maximum, 10 g/h. Air circulation speeds are 40, 60, 70, 85 and 100 CFM. In step with the other range of options, the timer has a maximum setting of 120 minutes and a 12 hour and 24 hour interval. Operation is straightforward with 5 simple buttons and a clear LCD display.

The company cites pet odors and dander, bacteria, viruses, pollen, mold spores, smoke, musty smells and chemical odors as suitable use for the generator. Recommended for use in the home, kitchen, offices, stores, hotels, restaurants, hospitals and clinics.

Latest Price and Promotions

  • Ozone Output: 2,000 mg/h to 10,000 mg/h
  • Dimensions: 9.3″ x 7.1″ x 6.8″
  • Weight: 6.6 lb
  • Ozone Plates: 1 (Ceramic Honeycomb)
  • Treatment Area: Up to 6,000 sq. ft.
  • Warranty: 3 years

Top Pick: Home and Office Duct-Mount Industrial Ozone Generator

OdorStop Duct-Mounted Building Ozone Generator OS5000D

OdorStop Duct-Mounted Building Ozone Generator OS500D

For duct-mounted installations and treating up to 10,000 square feet, our recommendation is another OdorStop model, this time the OS500D. The OS500D integrates with the HVAC system in a home or office as opposed to a free-standing or portable unit.

Since this unit is incorporated into a building’s ductwork, as you’d imagine, it is designed to be used while a building is occupied. Of course, the manufacture recommends monitoring ozone levels carefully in occupied spaces. We recommend using a high-quality indoor air quality monitor in rooms which the unit will service for safety.

Once installed, the OS500D’s 3 ozone plates prevent the growth of mold, mildew, viruses and bacteria. The unit is also effective at removing stubborn food and smoke and is often added to an air conditioner or heating system following water damage from a flood or after a fire.

Installation is simple, requiring only simple hand tools. And, the unit is backed by a 2-year warranty.

Latest Price and Promotions

  • Ozone Output: 150 mg/h to 1.4 g/h
  • Dimensions: 8″ x 16″ x 5″
  • Weight: 10 lb.
  • Ozone Plates: 3 Plates
  • Treatment Area: Up to 10,000 sq. ft.
  • Warranty: 2 years

Top Pick: Professional Grade Commercial Ozone Generator

OdorStop Professional Grade Ozone Generator OS12500

OdorStop 12500 - Top Commercial Ozone Generator

Simply stated: nothing compares to the OdorStop OS12500 when shopping for the best-of-the-best in commercial ozone generators.

OdorStop’s top-end unit boasts no less than 12 ozone plates capable of an ozone yield of 2 g/hour all the way up to a staggering 10 g/hour. There’s also a pre-filter and large 2,000 CFM fan to service a 12,500 square foot area. While not required for operation, the unit accepts up to 50 feet of 12″ flexible ducting.

Built with flexibility and constant use in mind, the OS12500’s ozone plates can be cleaned without disassembling the unit. For transport the unit has wheels and a handle which is foldable. For large jobs, there’s no match for OdorStop’s flagship product.

Latest Price and Promotions

  • Ozone Output: 2 g/h to 10 g/h
  • Dimensions: 22″ x 22″ x 22″
  • Weight: 66 lb.
  • Ozone Plates: 12 Plates
  • Treatment Area: Up to 12,500 sq. ft.
  • Warranty: 5 years


Best Commercial Ozone Generator for Small Areas – Up to 1,250 sq. ft.

Enerzen Commercial Ozone Generator

Best Ozone Generator - Enerzen Commercial Ozone Generator

For smaller spaces, we recommend the Enerzen Commercial Ozone Generator (0-777). The unit is compact – it is a mere 7 inches x 8 inches x 6½ inches tall. Enerzen went with a simple approach with this model. it is a no-frills ozone machine and has a very affordable price tag.

Ozone output tops out at 6,000 mg/h, and the unit’s timer can be set for up to 3 hours. For sustained operation, there is a hold setting which continually generates ozone without the risk of shutoff.

Usability and maintenance

Using the unit couldn’t be easier. There’s really only one step: Turn the dial to the number of minutes you want it to run for or select the ‘Hold’ setting. That’s it. One of our favorite features is that use of steel filters which make maintenance easy. Ozone generation is handled by ceramic plates which are owner serviceable.

This ozone generator would be a great fit for garage, small room, office, RV or automotive use. For those needing to service a larger area, check out the other Enerzen models available on the same page.

Latest Price and Promotions

  • Ozone Output: up to 0.6 g/h
  • Dimensions: 7″ x 8″ x 6½”
  • Weight: 5 lb
  • Ozone Plates: 3 Plate
  • Treatment Area: Up to 1,250 sq. ft.
  • Warranty: 1 years

Top Pick: Ozone Generator for Car and RV Odor Removal

OdorStop Professional Grade OS600UV

Odor Stop OS600 Best Car Mold and Smell Removal

The smallest unit on our best-of list is another OdorStop. The OS600UV is designed for RV, truck and car mold removal (and odor removal). This car ozone generator is a great pick for automotive detailers, restoration professionals as well as general consumers looking to rid vehicles of stubborn odors, mold and bacteria.

The unit can be thought of as a miniature version of the 3,500 square foot model above, just designed for 600 square feet and below. That’s larger than any RV and far smaller than any ozone generator you’d need for automotive jobs. Just like its big brother, this highly portable ozone generator has a single ozone plate, a UV-C bulb and charcoal filter.

It’s also the only unit that can be used in spaces that are occupied. For use in occupied space the 600 should be used with its ozone emissions turned off. In this mode the unit serves as a UV air cleaner and can kill bacteria, viruses and odor without bothering occupants. Of course, for maximum effect the unit’s ozone generation function should be enabled (and the room should be occupant free).

Latest Price and Promotions

  • Ozone Output: 300 mg/h
  • Dimensions: 12.5″ x 9″ x 7.5″
  • Weight: 5.8 lb.
  • Ozone Plates: 1 Plate
  • Treatment Area: Up to 600 sq. ft.
  • Warranty: 5 year

Top Pick: Budget 10,000 mg/h Ozone Generator

VIVOSUN Industrial Commercial Ozone Generator

VIVOSUN O3 Budget Ozone Generator

A low price paired with Vivosun’ quality and reliability combine in their 10,000 mg/h Industrial Commercial Ozone Generator. This unit is a budget one with less in just about every specification to Airthereal’s digital unit. But, if your needs are simple, you’ll like the lower price.

The ozone plates are rated for 20,000 service hours or 5 years, whichever comes first. That’s in line with pricier models in this range.

What’s lacking? Neither ozone output level nor fan speed are variable, and the timer function is limiting. The warranty isn’t quite as long as the competitors, either. But, Vivosun makes good products and we’d expect it to hold up just fine.

Latest Price and Promotions

  • Ozone Output: 150 mg/h to 900 mg/h
  • Dimensions: 11.1″ x 10.9″ x 9.4″
  • Weight: 7.6 lb.
  • Ozone Plates: 2 Plates
  • Treatment Area: Up to 2,000 sq. ft.
  • Warranty: 1 year

Choosing the Right Ozone Generator

When selecting an air scrubber there are a few factors that should always be considered, including:

  • Health and Safe Operation – Most ozone generators are not intended to be used in rooms that are occupied by people or animals. Some newer models can be used when people or pets are in the area being treated, however. Be sure to check the manufacturer’s instructions for safely using whichever machine you purchase. If you need to treat an area when it is occupied, be sure to purchase one that is rated for that type of use.
  • Operating Costs – Beyond the cost of electricity, additional operating costs include replacing ceramic ozone plates, filters, charcoal media and UV bulbs. Every ozone generator will have at least one consumable, the ceramic ozone plates. Most also have at least one filter. UV bulbs are less common. For units that do use UV light, the bulbs are generally long-lasting. It is worth noting that they aren’t cheap when they do burn out.
  • Ozone Output – Ozone output varies by the size of the unit, number of ozone plates and what technology is enlisted to generate ozone.
  • Portability – Most purchasers of ozone generators for home, office or professional require portability. Most of the units above are hand-carry units. The one exception is the largest, industrial unit. Regardless, each unit is easily moved.
  • Price – In comparison to other air purification, remediation and remodeling products, ozone generators are comparatively cheaper than the best air scrubbers and commercial dehumidifiers. With that said, any money spent should be an investment in a quality product. Each product above meets that standard.
  • Quality – We recommend going with a trustworthy brand that has verified customer reviews as well as a comprehensive warranty. Each of the ozone generator manufacturers above have one if not both characteristics. As reviews change over time, do consult the most recent product reviews. 
  • Square Footage – Scale the ozone generator purchase based upon the size of the area you’ll most often be treating. Most units declared a maximum working area in square feet.
  • UV Light – UV light isn’t a given. Some ozone generators incorporate a UV light for additional air purification. Some units with UV lights also allow the ozone generator to run with just UV air cleaning enabled and ozone generation disabled. 

Information and reviews last updated December 18, 2020.