This book demonstrates the enormous possibility of energy saving and reduction of CO2 emission achievable through zero-energy buildings, a building not dependent on outside energy sources. It describes technical and economical merits of utilizing renewable energies in building sectors that are not subject to factors such as disruption or price increase due to invasion, wars or sanctions. Three different buildings located in a cold climate in the northeastern USA and warm climate conditions, in California, are examined in this book. The energy balance before retrofitting and afterwards are compared and described for each of the study properties.

Dr. Sassan Mohasseb is Chief Executive Officer (CEO) of SMTEAM GmbH, Meilen, Switzerland. He was educated at ETH Zürich, Switzerland and Stanford University, in California USA and has been an invited lecturer at MIT.

Dr. Reza Davoodi is Head of the Energy Department at SMTEAM GmbH, Meilen, Switzerland.