Design of a new emergency department (ED) on the first level of the Nesson Ambulatory Building and Ambulatory Service Building 1 (ASB1). The project includes a 28,000 SF renovation of existing office and ambulatory space into a new ED, including a 4,000 SF infill of the building’s existing atrium. It provides 80 exam beds, new airborne infection isolation rooms, three new trauma rooms, and two new CT rooms, as well as a new ED waiting / check-in area. The existing ED, located in ASB1, remained operational during the first phase of the project, while later phases included a 25,000 SF renovation of that existing space. Additionally, a new 70,000 cfm rooftop air handling unit and new electrical infrastructure were provided to serve the new ED.