Energy efficiency can be simply defined as “Providing same service with less energy”. Due to rising energy costs and global competition , usage of resources and energy effectively becomes more important. Using the resources and energy efficiently, provides both economic and environmental advantages. Therefore lots of companies create an energy policy, build energy departments and educate the employees in order to establish resource efficiency issue as a culture of their organization. The companies which do the same work with less energy , use the energy more effectively , significantly improving their revenues and profits.