Ozone for Air Purification

Ozone is supercharged oxygen, and it is one of the most effective natural tools available for cleaning the air. It works by oxidising the things that make a space smell stale or feel unhealthy - smoke, cooking and pet odours, airborne bacteria, viruses and mould spores - then reverts back to ordinary oxygen, leaving no chemical residue behind. It is the same chemistry used across the food, water and commercial cleaning industries, brought into a form you can use at home.

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What people use an air ozonator for

Odours & smoke

Neutralises stubborn smells at the source - cigarette smoke, cooking, pets, damp - rather than masking them with fragrance.

Mould & damp rooms

Helps control surface mould and reduce airborne spores in bathrooms, basements, wardrobes and other damp spaces.

Kitchens & food areas

Reduces airborne microbes and lingering food smells in kitchens, pantries and storage rooms.

Cars & interiors

Clears smoke, pet and musty odours from vehicles, caravans and boats where they are hard to shift.

Rentals & hospitality

A fast turnaround between guests - freshen a room, holiday let or hotel space without heavy chemicals.

After fire or flooding

High-ozone shock treatment tackles smoke and musty flood odours that ordinary cleaning cannot reach.

How ozone cleans the air

Ozone (O₃) is an energised form of oxygen with an extra, loosely held oxygen atom. That spare atom is what does the work.

1. Ozone formsThree oxygen atoms, one loosely held

2. It oxidises the pollutantThe spare atom breaks off and neutralises it

3. It reverts to oxygenNo residue - just cleaner, fresher air

How much it achieves depends on three things: the concentration of ozone, how long it runs, and the size of the space. That is why there are two quite different ways to use it.

Two ways to use ozone in the air

Low-level, occupied use

Some ozone generators are designed to run at low output to keep the air in a room fresh while people come and go. This is best suited to gentle odour control and general freshening, always following the output guidance for your model and room size.

High-ozone shock treatment

For strong odours - smoke damage, flood mustiness, heavy mould - a short, high-concentration blast is far more effective. The generator runs at high output in an empty, sealed room for a set period (often around an hour, depending on the space), then the ozone is left to break back down into oxygen before anyone re-enters. This is the method that removes odours nothing else can shift.

What the research shows

Ozone's use as an air and surface disinfectant is well documented. In controlled laboratory and closed-chamber studies, gaseous ozone has been shown to inactivate a broad range of airborne and surface microbes - one 2021 review reported more than 3-log (99.9%+) inactivation for 28 of the 29 viruses tested^[1], and studies note that effectiveness depends on ozone concentration multiplied by contact time^[2]. That is precisely why disinfection is carried out in a sealed, unoccupied space and the air is cleared before re-entry. These are controlled-condition results - real-world performance depends on using the right unit correctly for your space, and this is a cleaning and sanitation use, not a medical or health-protection claim. You can explore the studies in our Scientific Literature library.

Using ozone safely

Ozone is powerful precisely because it is reactive, and that same property means it is a respiratory irritant at high concentrations. Used sensibly it is safe and effective - here is how to keep it that way:

Do not breathe high concentrations. During shock treatment, people, pets and plants should be out of the room for the whole cycle.
Seal the space, then ventilate. Close the room while treating, then air it out and let the ozone settle back to oxygen before re-entering (allow around an hour after a shock treatment).
You will smell it before it is harmful. Ozone has a sharp, distinctive smell well before it reaches uncomfortable levels - if it is strong, increase airflow or move the unit to a larger or more open area.
Match the machine to the space. Follow the output and timing guidance for your model. Bigger is not always better.
Treat the cause, not just the air. Ozone clears mould spores and damp smells from the air, but for a lasting result you also need to fix the moisture source behind the mould - see our guide, The Nine Steps to Eliminate Mould Naturally.

Every Natural Ozone air generator comes with clear instructions, and our team is on hand if you are unsure which approach suits your situation.

Choosing an air ozonator

Our range covers everything from freshening a single room to heavy-duty odour removal in a whole building:

PURIMAX Portable Air Ozonator (5G) - our most popular home unit. Light and portable, it moves easily from room to room to clear odours, smoke and musty smells, and to freshen cars, rentals and hospitality spaces. A great first air ozonator for most homes.

Multipurpose Ozonator - a flexible unit that treats both air and water, if you would like ozonated drinking water as well as air purification from one machine.

Respiratory Relief Ozone Bundle - a fuller setup for those who want a complete home ozone kit.

Not sure which fits? Tell us your room size and what you are trying to clear, and we will point you to the right one.

Ready to clear the air?

Browse the full range of home and commercial air ozonators, or get in touch for a personal recommendation.

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Common questions

Is ozone safe to use at home?

Yes, when used as directed. The key is not to breathe high concentrations - so shock treatments are done in an empty, sealed room and the space is aired out afterwards. Low-level generators designed for occupied rooms run at much gentler outputs. Ozone's strong smell acts as a natural warning long before levels become uncomfortable.

Will an ozone generator get rid of mould?

Ozone helps control surface mould and reduces airborne mould spores and the musty smell that comes with them. For a lasting result, pair it with fixing the underlying damp or ventilation problem - otherwise the mould will return once treatment stops. Our guide, The Nine Steps to Eliminate Mould Naturally, walks through the full process.

Do I need to leave the room?

For a high-ozone shock treatment, yes - people, pets and plants should be out for the full cycle, with the room aired out before re-entry (allow around an hour afterwards). Low-level units intended for occupied spaces are different; always follow the guidance for your specific model.

Does it leave any residue or chemical smell?

No. Ozone reverts to ordinary oxygen once it has done its work, so there is nothing to wipe away and no chemical residue left in the room - just cleaner-smelling air.

How is this different from an air freshener or filter?

Air fresheners mask odours and filters trap particles as air passes through them. Ozone oxidises odour molecules and microbes directly, on surfaces and in the air throughout the space, then disappears. It addresses the source of the smell rather than covering it up.

References

Can ozone inactivate SARS-CoV-2? A review of mechanisms and performance on viruses. Read in our Scientific Literature library
Ozone-based disinfection of SARS-CoV-2 (human coronavirus). Read in our Scientific Literature library
Inactivation of norovirus by ozone gas in conditions relevant to healthcare. Read in our Scientific Literature library
A review of ozone technology for the safety and quality of fresh-cut fruit and vegetables. Read in our Scientific Literature library

These summarise controlled laboratory and review sources on ozone as a disinfectant. They describe cleaning and sanitation performance under controlled conditions and are not a claim to prevent, treat or cure any illness.