I turned to Tim Stuver with Ideal Consolidated, Inc. (South Bend, IN) the HVAC engineer and contractor for the project. He said ventilation in the working press area of the box came from the use of operable windows. “The university did not desire to have ventilation in the main space, which is used only on game days and intermittently for special functions,” he said, adding that the restrooms utilize the Mitsubishi E-style units for exhaust makeup.
Thanks Tim for the clarification.