Stepped dimpled mounting brackets for heat exchangers

A heat exchanger comprising:

• a module including a plurality of stacked, hollow plate pairs or tubes including mating end bosses having communicating openings formed therein to form a manifold for the flow of fluid through the plate pairs or tubes;
• a top fin located on top of the stacked plate pairs or tubes;
• a bottom fin located below the stacked plate pairs or tubes;
• at least one intermediate fin located between the plate pairs or tubes;
• said fins all extending between the respective end bosses;
• top and bottom mounting brackets each having a planar central portion in contact with respective top and bottom fins and opposed offset end portions located in a plane parallel to and spaced from the central portion and in contact with an adjacent end boss of an adjacent plate pair or tube, the offset end portions extending a first predetermined distance from the planar central portion;
• the central portion further having spacing projections extending transversely in a direction opposite to that of the offset end portions, said projections extending a second predetermined distance from the planar central portion;
• one of said offset end portions having an
• inlet orifice communicating with one of the end boss openings;
• and another of the offset end portions having an outlet orifice communicating with another of the end boss openings.