Green Building Energy Simulation and Modeling presents essential insights into concepts and applications of building energy physics. The authors provide a brief, but rigorous, explanation of various modeling methods for building energy systems, order reduction techniques, and building energy simulation platforms (BESPs) that is followed by BES model validation techniques, testing and evaluation. The book provides designers with the tools and methods they need to validate building energy systems and seize every opportunity to achieve greater energy savings and higher rating scores.