GES provided mechanical, electrical, plumbing and fire protection engineering services for the design of a new, 13-story, building consisting of 370,850 sf of office space, 3,500 sf of retail, a police station, clinic and fitness center. During the pre-design phase, GES worked with the design team to identify opportunities for energy optimization. Using a “shoebox” energy model and a first-cost analysis, GES evaluated multiple HVAC systems including VAV air handling unit systems with air scrubbers, dedicated outdoor air systems (DOAS) with variable refrigerant flow (VRF) systems, and chilled DOAS terminal unit systems.