Abstract: A heat exchanger for fluids is disclosed having a support assembly for the coil bundle which comprises two vertically spaced-apart support members between which the coil bundle of the exchanger is positioned. The bundle comprises a plurality of vertically spaced tubes each having a number of convolutions which slope upwardly and proceed outwardly to form the bundle. A bridge member having spaced-apart scalloped portions is provided which separate the convolutions of each tube to permit air and water to circulate therebetween. The support members have means for varying the slope of the bridge members depending on the nature of the fluid entering the exchanger.