Any process that energizes oxygen makes some ozone, and cold plasma is no exception. What matters is how much leaves the unit. AURA is designed to keep it below 0.01 parts per million with the BOOST dial off, a tenth of the U.S. occupational limit.
Why ozone forms
When the plasma splits oxygen molecules (O₂) into single oxygen atoms, some of those atoms join with other oxygen molecules to form ozone (O₃). It is the same reason the air smells fresh and sharp after a thunderstorm. Ozone is one of the reactive oxygen species, but it is also a lung irritant at elevated concentrations, so it has to be controlled.
How AURA controls it
Every AURA unit has a catalytic control element, supplied by ACI Catalysts in the United States, built into the air path. Treated air passes through it before leaving the unit, and the catalyst converts ozone back into ordinary oxygen. The element is part of how the unit is designed to run continuously around people and pets. It is not an accessory, and it should never be removed or bypassed.
The numbers, in context
About the BOOST dial
AURA has a physical BOOST dial that raises output above normal for intensive treatment. For everyday use it stays OFF. With BOOST on, ozone can exceed what the catalytic element handles.
How AURA differs from an ozone generator
Some products sold as air cleaners are ozone generators: they produce ozone on purpose as their main treatment agent. The U.S. Environmental Protection Agency advises against using ozone generators in occupied spaces, because the concentrations needed to be effective can exceed public-health standards.
AURA works the opposite way. Its treatment comes from the full mix of short-lived reactive species, and ozone is a byproduct that the unit is designed to remove before air exits.
Good practice
- Mount AURA where it never blows directly into anyone's face, and out of reach of children and pets.
- Use it in interior spaces, away from showers, spray and wet areas, and not directly beneath an A/C unit.
- Keep both grilles clear, and check the catalytic element for damage or discoloration during routine cleaning.
- If you notice a sharp smell, confirm BOOST is off, move to fresh air, unplug the unit and contact support.
- Anyone with respiratory sensitivities should check with a physician before extended use of any air treatment device.
Ozone statements apply under tested operating conditions with BOOST off. Full safety guidance is in the AURA User Manual.
