ASHRAE Journal - June 2019 - 40

TECHNICAL FEATURE

What's New in
ASHRAE Standard 15
BY RUSTY THARP, MEMBER ASHRAE

As a father of young boys* who loved Thomas the Tank Engine it was notable to me
that many Thomas shows involved crashes. Many other parents were also concerned
about "reckless" behavior and advocated for better behavior from Thomas. So, it is no
surprise that the show (and book) producers started including many improved safety
concerns as well as making speciﬁc shows about safety. Improving safety happens
in many areas, including the long-standing ASHRAE Standard 15, Safety Standard for
Refrigeration Systems.
First, a little background about ASHRAE Standard 15.
It is directed toward the safety of persons and property
on or near the premises where refrigeration facilities
are located. It includes speciﬁcations for fabrication of
refrigerating systems but does not address the effects
of refrigerant emissions on the environment. For information on the environmental effects of refrigerant
emissions, see ANSI/ASHRAE Standard 147,† Reducing the
Release of Halogenated Refrigerants from Refrigerating and AirConditioning Equipment and Systems. ASHRAE Standard 15
gives a method for determining the amount of refrigerant that could safely be emitted into a given space in the
event of a leak. If that amount is exceeded, a machinery
* For clariﬁcation, this was not in recent years.
ASHRAE Standard 34 initially released 2L as a sub-class of category
2, however 2L was modiﬁed recently by Addendum g to ASHRAE
Standard 34-2016 to become its own class.
40

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room is required to house the refrigeration system.
When a refrigerant is not classiﬁed in ASHRAE Standard
34, Designation and Safety Classiﬁcation of Refrigerants, or its
addenda, it is the responsibility of the owner of a refrigerating system to make this judgment.
Standard 15 is one of several ASHRAE standards that
are on the Continuous Maintenance Process (CMP),
where revisions/improvements to the standard are
issued via addendums on an ongoing basis as opposed
to the typical every-ﬁve-year review cycle of all other
ASHRAE Standards. As CMP proposals (which allows
additions and modiﬁcations to be made based on
feedback from users, changes in the science originating from ASHRAE and industry research, as well as
changes in refrigeration technology) are addressed
Rusty Tharp is director-regulatory affairs at Goodman Manufacturing. He is chair of
SSPC 15.

https://www.ashrae.org/

ASHRAE Journal - June 2019

Table of Contents for the Digital Edition of ASHRAE Journal - June 2019

Contents
ASHRAE Journal - June 2019 - Intro
ASHRAE Journal - June 2019 - Cover1
ASHRAE Journal - June 2019 - Cover2
ASHRAE Journal - June 2019 - 1
ASHRAE Journal - June 2019 - Contents
ASHRAE Journal - June 2019 - 3
ASHRAE Journal - June 2019 - 4
ASHRAE Journal - June 2019 - 5
ASHRAE Journal - June 2019 - 6
ASHRAE Journal - June 2019 - 7
ASHRAE Journal - June 2019 - 8
ASHRAE Journal - June 2019 - 9
ASHRAE Journal - June 2019 - 10
ASHRAE Journal - June 2019 - 11
ASHRAE Journal - June 2019 - 12
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ASHRAE Journal - June 2019 - 14
ASHRAE Journal - June 2019 - 15
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ASHRAE Journal - June 2019 - Cover3
ASHRAE Journal - June 2019 - Cover4
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