Experimentation

For a few months in 2012 (?), I brought two digital thermometers and a data-logger each week.
I will still have them somewhere, but they are not easily accessible or findable.

My main finding is that there is no way to make the room cooler, once it is full of dancers.
All we can do is minimise the rate at which it heats up !

This means that any unsuccessful experimentation during the evening means that the final temperature will be higher.

The most useful thing we can do is to start the evening with the room as cool as possible, by turning the heating off (!), opening the exits and using the fans to blow air in one side and out the other. This can bring the hall down close to the outdoor temperature.