Data from the study day comes from two sources – the Tinytag sensors, and the worksheets recording surface temperatures, relative humidity, and air speed and direction.

Useful background


synchronized temperature and relative humidity sensors
synchronized temperature and relative humidity sensors

The synchronized Tinytag sensors measure air temperature and relative humidity.   Although electronic sensors typically aren’t as accurate as good old-fashioned sling psychrometers and spirit thermometers, these ones had been calibrated.  As we found, they still always need to be checked!    We had the sensors dotted around the site for two weeks before the study day.  There are some Tinytag traces made from the data in the participant materials download.

However, we encourage you to form your own views of the data.  These data files are straight as they come off the sensors, in CSV format for import into, e.g., Excel:

The first thing to do is discard the duff backnavelow humidity readings. After that, you need to “top and tail” the readings – removing everything before 3 Feb at 18:00, and everything after 17 Feb at 11:00.


One of the disappointments of the day was that we didn’t have the worksheets laid out quite well enough for the groups to make formal thermal comfort assessments on the day.  We had planned to take groups through the radiant temperature calculations and then use Berkeley’s on-line calculator to check conditions against the ASHRAE-55 standard.

We’re part-way through processing the worksheets – this is coming soon.  They tell us the surface temperatures inside and outside the building, as well as relative humidity, air speed, and direction at some key locations.

  • worksheet images  – they’re extracted from photographs of a version of the plans that was difficult to lay flat, so they aren’t entirely to scale.  Next time we’ll try to have better ones that cover all the areas!

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