The usage of data centers globally has skyrocketed in the past three to four years in response to growing demand for information storage and transfer from banks, hospitals, government bodies, telecom operators and hosting facilities. Data center power load (and therefore heat dissipation) footprints are continuing to rise, with greenhouse gas emissions from data centers expected to overtake airline industry emissions by 2020. Cooling constitutes a major cost in the operation of a data center. This has led to an increased focus on minimizing energy use in data centers and thereby reduced operating costs.