A spirally wound tube heat exchanger 10 article that receives a heat
exchange fluid and its method of manufacture. In one embodiment, the
exchanger 10 has one or more spirally-wound layers 12 of a tube 14. In
some embodiments, the layers are circular, oval or rectangular with
radiused corners. An elongate spacer member 24 has forwardly 26 and
rearwardly 28 facing edges. Defined within those edges are engagement
surfaces 30 that detachably retain the tube 14.