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ANSI/ASHRAE 34-2004

Designation and Safety Classification of Refrigerants

This standard provides an unambiguous system for numbering refrigerants and assigning composition-designating prefixes for refrigerants. Safety classifications based on toxicity and flammability data are included. This standard does not imply endorsement or concurrence that individual refrigerant blends are suitable for any particular application.

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American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. [ashrae]

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