In this book, energy consumption in the household sector is examined. Barriers to and enablers of energy efficiency in households in relation to governmental policy formulation, the implementation and appropriation of technology are discussed. This represents a shift away from the conventional focus on energy supply toward a focus on energy use in everyday life. This shift is urgently needed, since households, policy makers, housing companies, and researchers need deeper knowledge of how energy facilitates necessary functions in people's daily lives. New paths must be developed to smart and climate-friendly energy use that continue to facilitate those lives. This book discusses the existing opportunities to improve energy efficiency, by starting to implement existing knowledge as well as energy efficient technology and solutions.