We have made the following graphic available as a general guide for people with any concerns about their building air conditioning system or ventilation. These should be discussed with your building owner/service provider but give a good starting point to form your own policy. For example the CO2 level is a recent suggestion but each office/building and its surrounding space would be taken into consideration before deciding on any change. Equally the humidity is a normal range.
The PDF can be downloaded here
![](https://www.cdlweb.info/wp-content/uploads/2020/05/INFOGRAPHIC-2020_C19VENTFinal-212x300.jpg)