A method of exchanging heat comprising the steps of: providing an indirect evaporative heat exchange section (216; 261, 256), the indirect heat exchange section conducting a fluid stream within a plurality of pathways, the indirect heat exchange section comprising a top and a bottom, distributing an evaporative liquid generally downward onto and through the indirect heat exchange section such that indirect heat exchange occurs between the fluid stream within the plurality of pathways and the evaporative liquid, moving air through the indirect section, the air moving through the indirect heat exchange section exchanging heat with the evaporative liquid moving through the indirect heat exchange section and hence indirectly exchanging heat with the fluid stream within the plurality of pathways in the indirect section, characterised in that the indirect heat exchange section is comprised of a series of serpentine tubes comprising run sections and normal and increased height return bend sections, the series of serpentine tubes including at least one area having an increased vertical spacing between vertically adjacent run sections of the serpentine tubes, such increased vertical spacing formed by the increased height return bend sections (217; 260A, 255A) which have a height greater that the normal return bend sections (218; 262, 257), wherein a direct heat exchange section is provided in one or more of the areas in the indirect heat exchange sections having increased vertical spacing between vertically adjacent run sections of the series of serpentine tubes. providing an indirect evaporative heat exchange section (216; 261, 256), the indirect heat exchange section conducting a fluid stream within a plurality of pathways, the indirect heat exchange section comprising a top and a bottom, distributing an evaporative liquid generally downward onto and through the indirect heat exchange section such that indirect heat exchange occurs between the fluid stream within the plurality of pathways and the evaporative liquid, moving air through the indirect section, the air moving through the indirect heat exchange section exchanging heat with the evaporative liquid moving through the indirect heat exchange section and hence indirectly exchanging heat with the fluid stream within the plurality of pathways in the indirect section, characterised in that the indirect heat exchange section is comprised of a series of serpentine tubes comprising run sections and normal and increased height return bend sections, the series of serpentine tubes including at least one area having an increased vertical spacing between vertically adjacent run sections of the serpentine tubes, such increased vertical spacing formed by the increased height return bend sections (217; 260A, 255A) which have a height greater that the normal return bend sections (218; 262, 257), wherein a direct heat exchange section is provided in one or more of the areas in the indirect heat exchange sections having increased vertical spacing between vertically adjacent run sections of the series of serpentine tubes. the air moving through the indirect heat exchange section exchanging heat with the evaporative liquid moving through the indirect heat exchange section and hence indirectly exchanging heat with the fluid stream within the plurality of pathways in the indirect section, characterised in that the indirect heat exchange section is comprised of a series of serpentine tubes comprising run sections and normal and increased height return bend sections, the series of serpentine tubes including at least one area having an increased vertical spacing between vertically adjacent run sections of the serpentine tubes, such increased vertical spacing formed by the increased height return bend sections (217; 260A, 255A) which have a height greater that the normal return bend sections (218; 262, 257), wherein a direct heat exchange section is provided in one or more of the areas in the indirect heat exchange sections having increased vertical spacing between vertically adjacent run sections of the series of serpentine tubes.