Finned tube coils are commonly used for gas-liquid exchange. Heat transfer on the gas side is usually much lower than on the liquid side, and heat sinks are required on the gas side. The outer fins of the tube may be normal on a single tube, or may be transverse, spiral or longitudinal. Longitudinal fins are commonly used in double tube or shell heat exchangers without baffles. A fluid may be a gas or a viscous liquid. Our finned tube coil products range from small applications to large commercial and industrial projects.