Another twist to energy conservation is energy reuse. It is possible to use the waste heat generated in a data center for non data center heating needs. This can be thought of as Energy Recycling, a method of reducing the impact of data centers on the environment. A great opportunity to enable a data center for energy reuse is at their conception as a goal during the design. With the growing number of data centers being built, now is the time to integrate energy saving and reuse methods. Data centers located in climates with a need for heating, will hopefully recover and reuse a majority of their operating energy for heating non data center areas and adjacent buildings in the future. Since data centers operate at a relatively constant energy demand, they offer a stable and near constant source of heat. The colder the environment, the more financially attractive it can be to install the equipment needed to recover and transfer the heat from the data center to adjoining areas or even neighboring buildings. Imagine data centers located in downtown areas of the city sending off their heat energy and heating other buildings as if they were a utility provider!