Using multiple synchronised dataloggers to identify vapour production, ventilation and heat gain/loss.
Here is an example using 10 dataloggers installed in a 5 bedroom Victorian house. Do use it or better still, improve on it and feedback. This is summer version. The summer and winter version is too large (and complex) for upload.
Note always, that dew point is a proxy for vapour quantity, so it can be used to identify vapour gain loss, compared to another room, or the average.