Halogenated refrigerants, when released into the atmosphere, deplete the ozone layer and contribute to global warming. This standard establishes practices and procedures that will help air-conditioning equipment designers, installers and operators reduce the inadvertent release of halogenated refrigerants. The standard helps reduce refrigerant release during equipment manufacture, testing, installation, operation, maintenance, repair and disposal. (ISSN: 1041-2336) This standard is under continuous maintenance, which is a process ASHRAE uses to keep guidelines and standards current through the issuance of addenda, or revisions. These addenda can be downloaded for free at the following page of the ASHRAE web site: www.ashrae.org/standards/addenda.htm. Interpretations of the standard, issued by the sponsoring technical committee, also may be downloaded for free at the following address: www.ashrae.org/standards/interpretations.htm. Errata lists are issued occasionally and may be downloaded for free at the following address: www.ashrae.org/standards/errata/htm. Please check the ASHRAE web site regularly to keep your standard updated.