A manifold (12, 14) for a heat exchanger assembly, the manifold comprising: a body comprising: a first end disposed opposite a second end; a top surface disposed opposite a bottom surface; a first side surface extending between the top surface and the bottom surface; a second side surface extending between the top surface and the bottom surface opposite the first side surface; a first plurality of chambers formed in the body, wherein each chamber of the first plurality of chambers extends from the top surface to the bottom surface and extends between the first side surface and an intermediate plane disposed between the first side surface and the second side surface, and wherein each chamber of the first plurality of chambers is spaced apart from one another between the first end and the second end of the body; and a second plurality of chambers formed in the body, wherein each chamber of the second plurality of chambers extends from the top surface to the bottom surface and extends between the second side surface and the intermediate plane, and wherein each chamber of the second plurality of chambers is spaced apart from one another between the first end and the second end of the body; and a plate disposed on the top surface of the body, and characterized by the body of the manifold (12, 14) further comprising: a plurality of grooves formed in the top surface of the body such that each groove extends from the first side surface to the second side surface, wherein each groove of the plurality of grooves is disposed between two chambers of the first plurality of chambers and two chambers of the second plurality of chambers. a body comprising: a first end disposed opposite a second end; a top surface disposed opposite a bottom surface; a first side surface extending between the top surface and the bottom surface; a second side surface extending between the top surface and the bottom surface opposite the first side surface; a first plurality of chambers formed in the body, wherein each chamber of the first plurality of chambers extends from the top surface to the bottom surface and extends between the first side surface and an intermediate plane disposed between the first side surface and the second side surface, and wherein each chamber of the first plurality of chambers is spaced apart from one another between the first end and the second end of the body; and a second plurality of chambers formed in the body, wherein each chamber of the second plurality of chambers extends from the top surface to the bottom surface and extends between the second side surface and the intermediate plane, and wherein each chamber of the second plurality of chambers is spaced apart from one another between the first end and the second end of the body; and a first end disposed opposite a second end; a top surface disposed opposite a bottom surface; a first side surface extending between the top surface and the bottom surface; a second side surface extending between the top surface and the bottom surface opposite the first side surface; a first plurality of chambers formed in the body, wherein each chamber of the first plurality of chambers extends from the top surface to the bottom surface and extends between the first side surface and an intermediate plane disposed between the first side surface and the second side surface, and wherein each chamber of the first plurality of chambers is spaced apart from one another between the first end and the second end of the body; and a second plurality of chambers formed in the body, wherein each chamber of the second plurality of chambers extends from the top surface to the bottom surface and extends between the second side surface and the intermediate plane, and wherein each chamber of the second plurality of chambers is spaced apart from one another between the first end and the second end of the body; and a plate disposed on the top surface of the body, and characterized by the body of the manifold (12, 14) further comprising: a plurality of grooves formed in the top surface of the body such that each groove extends from the first side surface to the second side surface, wherein each groove of the plurality of grooves is disposed between two chambers of the first plurality of chambers and two chambers of the second plurality of chambers. a plurality of grooves formed in the top surface of the body such that each groove extends from the first side surface to the second side surface, wherein each groove of the plurality of grooves is disposed between two chambers of the first plurality of chambers and two chambers of the second plurality of chambers.