Building Automation System Retrofit Case Study Baseline D Building at Parkland College, located in Central Illinois, is a 99,407 square foot, 3-story structure. It was opened in 2002 and contains offices and classrooms, with a design occupancy of 1050 people. The HVAC control was provided by the original building automation system (BAS). The building’s chilled water is provided by the campus chilled water system located in a remote mechanical building and the hot water is provided by two hot water boilers located in the lower level of D Building. The air distribution is provided by four air handlers and one hundred and twenty variable-air-volume (VAV) boxes. The building’s exhaust is provided by ten exhaust fans with only one, EF1, being controlled

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