Heat exchanger

In a serpentine type evaporator for use in a refrigeration circuit, said evaporator comprising a serpentine flat tube including a plurality of spaced essentially parallel planar portions and a plurality of bent portions, fins interposed between opposed outer surfaces of said serpentine flat tube, an inlet header pipe connected to one end of said serpentine flat tube, an inlet pipe connected to said inlet header pipe, an outlet header pipe connected to the other end of said serpentine flat tube and an outlet pipe connected to said outlet header pipe, the improvement comprising at last one of said inlet pipe and said outlet pipe being connected to its corresponding header pipe in a direction both perpendicular to said inlet header pipe or said outlet header pipe to which it is attached, and in a plane parallel to the fins.