This is an interesting article by an environmental psychologist, discussing the role of temperature on knowledge work. Research has indicated that the most optimal temperature for doing office work is around 72 degree Fahrenheit. Besides the actual temperature, human perceptions of temperature are also influenced by environmental design characteristics such as the colors of the walls, with rooms painted with warmer colors perceived as being warmer. Value systems also play a role in the perception of temperature. For example, if you are a conservationist, you may perceive the room to be much warmer compared to others.
Seems like it is not such a good idea to keep the conference rooms so cold if you want your meetings to be productive!
Photo credit: Andy Butkaj (Flickr), via Wikimedia Commons.