What is the most energy efficient industrial air conditioning / control unit?

I need to know for a research project and have found various products through google but figured i would get some word of mouth experience aswell.





solar panel powered is an option, money is no limit





commercial solutions also appreciated =]





thanks in advanceWhat is the most energy efficient industrial air conditioning / control unit?
I work in a LEED building in CA, we have an evaporative cooling system. It seems to work very well.





Geothermal is also a great option. A few feet underground it stays a constant temperature, I think around 54 degrees, so all you need is a set of pipes, vents and a fan to circulate the air.

cream tones