2/3 of power is used to cool the heat Generated by the other third.
Building smart cooling into your plant can easily save half.
Utilizing the "Waste" heat for office heating is just the first step toward matching data centers to heat loads, making the heat a commodity instead of a liability.
As i have stated before, a building full of humans is a reliable consumer of low grade heat especially hot water. And every calorie that comes off a chip, is 1/ cc less gas that needs to be burned for the same nice hot shower.. A further carbon reduction.
With Spanner, Google can even help the smart grid shed loads.
My next computer will heat my shower.