Abstract: An air duct includes an inlet and an outlet that are interconnected with one another by a curved intermediate portion. A plurality of chambers are disposed within the curved intermediate portion. Each chamber of the plurality of chambers includes a first end opening into the inlet and a second end opening into the outlet. An enclosed body portion interconnects the first and second ends of each chamber. The curved intermediate portion further includes a first cross-sectional configuration disposed at a first portion of the curved intermediate portion, and a second cross-sectional configuration that is different from the first cross-sectional configuration disposed at a second portion of the curved intermediate portion. The second portion of the curved intermediate is disposed downstream from the first portion of the curved intermediate portion. The air duct directs airflow in a demisting sequence and is further contemplated to be formed using an additive manufacturing process.