Energy conservation refers to the reduction in the consumption of energy by using less of an energy service. It includes the efficient use of energy as well as the reduction in the amount of services used. Energy conservation seeks to increase the environmental quality. It also reduces energy costs by preventing future resource depletion. One of the major ways of improving conservation of energy in buildings is through conducting an energy audit. It is concerned with an analysis and inspection of energy flow and consumption for energy conservation in a building, system or process. This book unfolds the innovative aspects of energy conservation which will be crucial for the holistic understanding of the subject matter. Most of the topics introduced herein cover new techniques of energy conservation. This book aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.