Patent ID: 7549465

Claim:
A heat exchanger having at least one inlet tube that ducts a heat exchange fluid, at least some of the inlet tubes being characterized by a first cross-sectional profile; a core in fluid communication with the at least one inlet tube, the core having one or more rows of core tubes that also duct the fluid, at least some of the core tubes being characterized by a second cross-sectional profile, wherein the first differs from the second cross-sectional profile; a first endplate assembly positioned between the at least one inlet tube and the core, the first endplate assembly having an inlet plate and a core plate, an inlet orifice in the inlet plate that is sized to sealingly engage the first cross-sectional profile; and an outlet orifice in the core plate that is sized to sealingly engage the second cross-sectional profile, the inlet and core plates cooperating to provide a sealing engagement therebetween along substantially the entire length of the plates, each of the at least one inlet tubes extending outside the first endplate assembly.