For naturally ventilated spaces in one of my projects it seems that CO2 monitors are the only option applicable. I've got some questions regarding this:
1. Is there anywhere a requirement on the numbers of CO2 sensors? A "thermal zone" could be one complete facade orientation, which can be pretty long (> 20 metres). Or is there some definition of thermal zone I am not aware of?
2. Is there a requirement on the placement of the sensors apart from height? I a Core&Shell building, with planned open office space, there are basically only the facade and the central column (8 metres from facade) to attach the sensors. Both places may lead to wrong CO2 measurements, facade lower, central columns higher than what actually applies to workplaces.