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    • Building HVAC Control System Interaction Issues: Two Case Studies 

      Chen, Q.; Deng, S.; Toole, C.; Xu, C. (Texas A&M University ( Systems Laboratory (, 2007)
      Direct Digital Control (DDC) allows HVAC equipment to be controlled at an upper level (supervisory control) through commands from a central system, or at a lower-level (local-loop control) by local controllers. The various ...