Evaporator or evaporator/condenser

An evaporator or evaporator/condenser comprising:

• first and second, generally cylindrical tubular headers in spaced, generally parallel relationship;
• an inlet in one of said headers;
• an outlet in one of said headers;
• a plurality of flattened tubes having major and minor dimensions extending between and in fluid communication with said headers and having their major dimensions spaced from and facing one another, each of said tube being an extrusion and having a plurality of internal webs extending across said minor dimension;
• serpentine fins flanking each of said tubes and filling the space between adjacent ones of said tubes and bonded thereto to form a core;
• elongated side pieces extending between said headers and embracing and bonded to the endmost ones of said serpentine fins, said side pieces having accordion formations intermediate their ends;
• said fins, said side pieces and said tubes being non-planar in one direction to define an elongated apex between said headers;
• a trough having an upward opening aligned with at least one of said headers;
• means mounting sad trough to said side pieces;
• and
• a condensate outlet from said trough.