Yes, entirely safe when used correctly and in line with our operating instructions. Ozofresh generators are designed and built to specifically avoid any health risks that might be present in other machines.
Norovirus has been a much publicised problem due to how highly contagious it is, especially in busy and warm environments, such as hospitals and nursing homes. It leaves the sufferer feeling extremely unwell for 24-60 hours with projectile vomiting, diarrhoea, headaches, stomach cramps, fever and muscle pain.
Ozone consists of three adjoined oxygen atoms, and is therefore referred to as O3, in the same way that oxygen (O2) consists of two oxygen atoms. Ozone is not very prominent in our atmosphere yet it plays a vital role in our day-to-day lives. It is invisible although when concentrated enough it takes on a blue tinge.
The noise you may notice is the fan(s), the only moving parts in an ozone generator. Their job is to suck oxygen in to create the ozone, and to help propel the ozone as high as possible. Because ozone is heavier than air, it needs to reach a decent height in order for it to be effective at removing pollutants in the air.