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ANSI/ASHRAE Addendum c to
ANSI/ASHRAE Standard 34-2019
Designation and
Safety Classification of
Refrigerants
Approved by the ASHRAE Standards Committee on October 16, 2019; by the ASHRAE Board of Directors on November 1,
2019; and by the American National Standards Institute on November 5, 2019.
This addendum was approved by a Standing Standard Project Committee (SSPC) for which the Standards Committee has
established a documented program for regular publication of addenda or revisions, including procedures for timely, docu-
mented, consensus action on requests for change to any part of the standard. Instructions for how to submit a change can
be found on the ASHRAE® website (/continuous-maintenance).
The latest edition of an ASHRAE Standard may be purchased on the ASHRAE website () or from
ASHRAE Customer Service, 1791 Tullie Circle, NE, Atlanta, GA 30329-2305. E-mail: orders@. Fax: 678-539-
2129. Telephone: 404-636-8400 (worldwide), or toll free 1-800-527-4723 (for orders in US and Canada). For reprint per-
mission, go to /permissions.
© 2019 ASHRAE ISSN 1041-2336
© ASHRAE. Per international copyright law, additional reproduction, distribution, or transmission in either
print or digital form is not permitted without ASHRAEs prior written permission.
ASHRAE Standing Standard Project Committee 34
Cognizant TC: 3.1, Refrigerants and Secondary Coolants
SPLS Liaison: Charles S. Barnaby
Staff Liaison: Brian C.
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