When you consider using ozone and ozone therapy there are a couple of VERY important things to know. When breathing ozone, it is paramount that you are in actual fact breathing a safe but effective amount of ozone. The World Health Organization (WHO) states that the safe amount for us to breathe is 0.04ppm – 0.08ppm (particles per million). The ozone generator we use is the only one of its type in Africa that is certified by the CSIR to constantly produce a safe 0.06ppm consistently.