All too often, energy management occurs in the rear-view mirror. Only after bills arrive do most businesses consider how energy use and spending might be better managed. Even then, bills contain very little information about how energy was used what equipment or processes drove consumption? What time of day saw the most use? Was consumption as expected, or are facilities running inefficiently? With energy demand trending to new heights, a greater need of operational efficiency, increasingly deregulated supply markets, and impending regulation of greenhouse gases, suddenly energy management has been thrust to the forefront of long-term planning. Leading businesses are now looking energy management as just as essential to their operations as accounting, supply management, or human resources. This book titled Handbook of Energy Management provides an unparalleled overview of management of energy as a subject area. The issues related to energy efficiency, cleanliness and conservation are high-lighted. The handbook also covers the global energy consumption and harvesting, energy accounting, energy crisis. Energy efficiency labelling which is very crucial issues now-a-days is discussed in detail with suitable case studies. Irrespective of this, conservation of all types of energies, i.e. solar, water, geothermal, wind and nuclear, is discussed in this handbook. This handbook will be very useful for the industry sector, the finance sector, the policymakers, the scientists, the decision-makers, the buyers and sellers of energy. This handbook will help develop and drive new initiatives, provide insights, showcase sustainable product development and energy management in order to elicit practical applications that are most relevant for global world at this juncture of energy crisis.