Building design and construction that helps deliver both superior air quality and occupant thermal comfort, while minimizing energy consumption, are examined. The paper explores an integrated building systems approach that combines the principles of "directed air flow control" and "demand controlled ventilation" where ventilation is effectively delivered to the occupant, based on loading, that can be applied to all types of indoor air quality situations in all types of buildings. Highlighted are savings and return of investment data for the traditional "green building" general design strategy. Case studies provide examples of this high performance IAQ design. Finally, key differences and advantages of a displacement ventilation design classroom versus conventional mixing ventilation systems are examined along with data of expected benefits of a heating, ventilation, air conditioning school displacement design. (GR)