Book excerpt: Heating and Cooling of Air Through Coils combines theory and practice to cover the fundamentals in the processes of heating and cooling of air through coils and the key aspects in the psychrometric chart, the coil fluid piping systems, the coils, and the energy sources for the fluid in the coils. This book covers the integral elements that have a significant impact on the heating and cooling of air through coils, including the coil types, coil tube constructions and arrangements, and fluid flow characteristics in the coils. It also discusses sustainable and renewable energy sources used to heat and cool the fluid flowing in the piping system and the coils. In addition, the book covers the application of coils in central air-conditioning systems and split air-conditioning systems. Presents the fundamentals of heating and cooling of air through coils. Explains the psychrometric chart used for assessing the physical and thermodynamic properties of air in the heating and cooling processes. Covers numerous coil types and constructions. Discusses the key equipment used in the coil fluid piping systems that deliver hot water, steam, condensate, and chilled water to and from the coils. Considers various energy sources to the fluid in the coil piping system for heating and cooling, including solar heat energy, ocean thermal energy, and geothermal energy. This book will interest engineers and researchers involved in the design and operation of heat exchangers and HVAC systems. It can also be used as a textbook for undergraduate and graduate students majoring in relevant fields, such as thermal and fluids HVAC, and energy management.