District heating and cooling (DHC) or district energy (DE) distributes thermal energy from a central source to residential, commercial, and/or industrial consumers for use in space heating, cooling, water heating, and/or process heating. The energy is distributed by steam or hot- or chilled-water lines. Thus, thermal energy comes from a distribution medium rather than being generated onsite at each facility. SYSTEM MASTER PLANNINGEconomic Considerations CENTRAL PLANTHeating and Cooling ProductionChilled-Water Distribution Design Considerations DISTRIBUTION SYSTEMHydraulic ConsiderationsThermal ConsiderationsMethods of Heat Transfer AnalysisExpansion ProvisionsDistribution System Construction CONSUMER INTERCONNECTIONSDirect ConnectionsIndirect ConnectionsSteam ConnectionsComponentsTemperature Differential ControlOperation and Maintenance ISBN: 978-1-947192-53-9 (for SI versions of chapters)ISSN: 1930-7705 (for SI versions of chapters)