Heat transfer, resistance, and characteristics of flow across banks of smooth, rough, and finned tubes in a wide range of variation of typical parameters have long been investigated at the Institute of Physical and Technical Problems of Energetics of the Academy of Sciences of the Lithuanian SSR. The authors of the present book accumulated additional material on the study of local and average heat transfer for in-line and staggered banks of tubes and the determination of their optimal pitch, roughness parameters, finning and effectiveness. A method is suggested for generalizing of experimental data to optimize the design of tube banks and to give the desired heat transfer and resistance characteristics. The material is enhanced with new data and is presented to the reader in a convenient form - as graphs and generalized equations normally required for practical computations.