Abstract: A heat exchanger (10) that is included in a cabinet (11) housing a plurality of baffles (12, 13). The baffles (12, 13) are arranged alternately and are spaced by a sheet material (14) that provides for the transfer of heat between gases passing through the baffles (12, 13). The baffles (12) each have a plurality of dividing walls (21) that provide a plurality of passages (22). The passages (22) extend between opposite longitudinal sides of the heat exchanger (10). The baffles (13) each have a plurality of dividing walls (33) that provide a plurality of passages (34) that extend between opposite end portions of the heat exchanger (10).

Abstract: A gas-flow heat exchanger comprising a set of parallel, spaced, heat-conductive areas providing between them a stack of pockets each containing parallel baffles which define a platen of passageways guiding the gas-flow path through the pocket between inlet and outlet openings. The openings being arranged in four parallel lines at the sides of the stack, two of the lines respectively containing the inlet and outlet openings associated with the gas flow paths of alternative pockets. The remaining two lines respectively containing the inlet and outlet openings associated with the remaining pockets. Each pocket containing a removable frame formed with the openings provided at the ends of the gas flow path through it and supporting within the frame the parallel baffles which divide the gas-flow path into the platen of passageways. All of the passageways provide a substantially equal dwell time to gas passing therethrough.