Containment of refrigerant is an important consideration during installation, service, maintenance, and decommissioning of refrigeration systems. The potential environmental effect of chlorofluorocarbon (CFC) and hydrochlorofluorocarbon (HCFC) refrigerants on ozone depletion, and of these and the hydrofluorocarbon (HFC) and hydrofluoroolefin (HFO) refrigerants on global warming, make it imperative that refrigerants are confined to closed systems and recovered during service and at the end of life. Containment must be considered in all phases of a system’s life, including (1) design and construction of leaktight and easily serviced systems, (2) leak detection and repair, (3) recovery during service, and (4) recovery at system disposal. Additional reference can be found in ASHRAE Standard 147. Emissions Types Design Installation Servicing and Decommissioning Training Leak Detection Recovery, Recycling, and Reclamation