The NSW government warn against the use of Ozone Generators.
Used correctly an Ozone generator: Eradicate mould, viruses, microbial growth, bacteria, and unpleasant odours! leaving no toxic residue.
It is worth readying about the difference between a professional application of ozone and that of a less powerful machine. AMC Ozone discuss Ozone Generators.
Where are these generators used-:
When properly used Ozone is safe. Breathing in high levels of Ozone is not good for you especially for the vulnerable ages (young and old) and those with respiratory conditions like asthma.