A manifold for a heat exchanger comprising a tank, a plurality of tubes
arranged to receive fluid therein, a plurality of fins for interspacing
the tubes, the fins extending along the length of the tubes to thereby
define a core section, wherein the header section is formed with
multi-point brazing interfaces for securing said header and said core
section during a brazing process. One embodiment provides at least one
doubled wall area in close proximity to the tube slot areas to form a
structure of increased strength, permitting the material to be reduced in
relative thickness. The manifold may be formed from flat sheet stock by
extended side walls of the header portion joined by a separate cap to
close a top portion of the manifold assembly for the purpose of collecting
fluid to and from the tubes and said at least one inlet and outlet. For a
plastic manifold, the header section is formed with an inner wall defining
an extended tube slot area of a header well to receive the plastic tank
foot portion thereby increasing the strength of the structure.
