The following chart shows the CO2 concentration over several days in a test room. As you can see, the indoor air quality is rather low and can be optimized by better airing. Without visible traffic lights, people will not open the windows in time, but need a device that indicates when it is time to air again.
According to the recommendations of the Ad-hoc AG IRK/AOLG, 2008, the following standard applies to the CO2 concentration in indoor air:
With Virtenio’s clearly visible CO2 traffic light, people can be sensitized to air in time to keep the CO2 concentration in a good range.