A heat exchange apparatus including a housing, a first array of fluid conduits provided within the housing, and a second array of fluid conduits provided within the housing. The first and second arrays of fluid conduits are configured to carry a first fluid. The heat exchange apparatus also includes a first fluid passageway provided within the housing, where the first fluid passageway is defined by an internal surface of the housing and by a baffle plate. The first fluid passageway is configured to carry a second fluid. The baffle plate is configured to divide the first fluid passageway into a first flow path and a second flow path, where the first array of fluid conduits extends through the first flow path and the second array of fluid conduits extends through the second flow path.