This graph shows the temperature distribution at 2pm on several days on one of our sites where there are 160 temperature sensors.
The lower temps are empty meeting rooms. The higher temps are located next to a bank of screens. All temperatures in working areas are 22-24 deg. Areas above 23 generally feel cool enough at desk level because there is chilled air circulating.
On an average day with 400 people working on site, there are zero ‘aircon’ requests to the facilities team.
Facilities will receive occasional requests when there is unseasonal weather (its cold in summer, or very sunny in winter) or when there equipment failures.
Before our work to improve this system, there were ‘aircon’ requests every day.