Describes an analytical model used to study the effects of air supply rates on the dynamics of an occupied space as related to energy consumption and occupant's comfort. Reviews the concept of Air Diffusion Performance Criteria (ADPI) and uses it to derive air movement control strategies to reduce energy consumption in buildings. Discusses the relationship between the air movement control strategies and passive thermal control strategies for energy efficient buildings. Describes procedures to calculate the terminal air velocity for a proposed diffuser and to optimize the selection of diffusers. Derivation of the air movement control strategies shows that a design criteria based upon the dynamic conditions can easily be co-ordinated with comfort criteria, load criteria and ADPI criteria.