A method and system of utilizing waste heat from a plurality of data center equipment comprising the steps of collecting waste heat from a plurality of data center equipment and utilizing said waste heat as the driving heat input for a heat driven engine. Heat recovery means collects waste heat from heat-producing equipment and transfers it in the form of hot water to drive a heat driven engine such as a chiller or heat pump. The output of the heat driven engine may be put to many productive uses, thereby reducing the over all energy load on the data center.