We have a 2-story building with multiple independently operating HVAC systems.  We are looking for guidance on how to log temperature and humidity during the flush-out.  The temperature will be tracked for each system by the BAS.  The building has a single humidity sensor that is also tracked by the BAS.  Can we use that single sensor as proof of the humidity in the building during the flush - or do we have to put in temporary data loggers in each space?

There isn't any guidance in the reference guide as to the frequency of measurement during the flush. Does anyone have better information on this?