Durham School of Architectural Engineering and Construction


Date of this Version



Published in Proceedings of the Sixteenth Symposium on Improving Building Systems in Hot and Humid Climates, Plano, TX, December 15-17, 2008, pp. 1-8


Continuous Commissioning® (CC®) strategies include reducing simultaneous heating and cooling, scheduling the facility’s occupancy needs, utilizing free cooling, and minimizing excessive supply air and outside air. Most significantly, this demandbased control energy conservation strategy can facilitate mechanical system performance at near optimal conditions through the gradual advancement of control systems and the ability of upstream systems reading the status of downstream systems.

This paper demonstrates demand-based temperature, pressure and economizer control by the mathematical optimization methodology illustrated by a case-study, implemented with actual systems in a 1.2 million square foot medical center. Based on the optimization results, the facility saved over 5% total building electricity and over 10% gas consumption in a period of one year while improving thermal comfort and maintenance operations drastically.