(57) The invention relates to a heat exchanger (1) provided with a series of first and
a series of second fluid ducts that are in heat exchanging contact with each other,
in which the ducts are bounded by circumferential walls comprising duct partitions
(2) and duct side walls (5), in which the heat exchanger (1) is formed by means of
folding substantially one metal plate into a packet of ducts having four sides, in
which the duct side walls (5) form opposite first (a) and second sides (c) of the
heat exchanger (1) and every other one respectively is provided with first and second
passages, respectively, for access to the ducts of the first and second series of
ducts, respectively, and in which the first series of ducts is closed off at the third
side (b) by means of folded down wall members (10) of the duct partitions (5) and
is open at the fourth side (d) and the second series of ducts is closed off at the
fourth side (d) by means of folded down wall members (10) of the duct partitions (5)
and is open at the third side (b).
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