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OPERATING AND MAINTENANCE INSTRUCTIONS
97 percent fewer viruses in the room air - this is the result of the study
"Efficiency of the room air purifier from oxytec (Cleanair Sky) on the reduction and
inactivation of airborne viruses". The Fraunhofer Institute for Building Physics (IBP)
tested the Cleanair Sky, which cleans the room air using the volume plasma
generated in the NTP process.
The tests were carried out under realistic room conditions, not only with aerosols,
but with living viruses that are identical to SARS-CoV-2 in structure, size and
stability, but are not a health hazard. The virus family is recognised for test series
of this kind. Thus, the study meets all the requirements of the Federal Environment
Agency for realistic conditions.
The result: The device inactivated the viruses by 97 per cent after 165 minutes. A
reduction of 73 per cent was already measurable after 45 minutes.
In comparable studies, often only salt water is evaporated in the room or viruses
are only tested in a test tube or on a filter. Inside the Cleanair Sky, the air flowing
through it is put into a non-thermal plasma state for an extremely short time and
the viruses are inactivated. Ozone is formed in the process. This reaction only
takes place inside the unit. Therefore, the ozone concentration measured in the
indoor air was very low and harmless to health: a maximum of 10
µ
g/m
³
, which is
only 8 per cent of the target value of 120
µ
g/m specified in the Federal Immission
Act. This target value is often far exceeded on summer days when ozone is
produced by nitrogen oxides in car exhaust fumes.
The Federal Environment Agency has stipulated that in the case of ozone-
producing air purification processes, the secondary products emitted by the
device into the indoor air must also be measured. Another result of the Fraunhofer
IBP study: no critical pollution by secondary products was detected during air
purification with the Cleanair Sky.
