The purpose of HVAC system is to provide and maintain a desired indoor thermal comfort. HVAC system inherents nonlinearity of the large scale system including pure lag time, big thermal inertia, uncertain disturbance factors and constraints which lead to inability to efficiently control this system. Furthermore, there is no combined model developed for the comprehensive HVAC system. This book addresses these issues by proposing a hybrid model combining building structure with the equipments of HVAC system in one model. The hybrid identification of physical and empirical methods is explained...