what is a safe ozone level
The US UL867 safety standard for ozone is ≤0.05PPM, and the EU standard is formulated with reference to the US standard. my country's standard GB simply says that UL867 means that under laboratory conditions (temperature 25°C, humidity 50%), the cumulative concentration produced by any ozone source cannot exceed 0.05PPM.
Ozone safety testing for air purifiers
At present, many air purifier manufacturers and testing institutions have not conducted ozone safety testing of air purifiers in accordance with the above-mentioned national mandatory standards.The percentage of ozone concentration should not exceed 5×10-6. (Note, no more than 0.05ppm. About 0.1mg/m3)
Health hazards of ozone pollution in the door
The COVID-19 pandemic has brought heightened attention to air quality indoor . People are thinking about how these invisible virus particles can spread indoors. However, the hazards of the indoor environment are not just the virus that causes the epidemic. According to WHO, air pollution is the world's greatest environmental health threat. Many people have always believed that ozone in the air is a double-edged sword. It has the side of sterilizing and inactivating viruses, but also has the side of endangering human health. Modern research suggests that ozone in indoor air has risen to be one of the most important pollutants.