Ozone Protection Hotline toll-free (800) 296-1996, direct dial 202-564-1613- What are HC-12a® and OZ-12®?
- What is DURACOOL 12a®? Is there a difference
between HC-12a® and DURACOOL 12a®?
- What is the legal status of hydrocarbon refrigerants
such as HC-12a® and DURACOOL 12a®?
- May hydrocarbon refrigerants be used to replace CFC-12,
commonly referred to as "Freon® ," in cars?
- Why is it legal to use hydrocarbon refrigerants as CFC-12
substitutes in industrial process refrigeration, but not elsewhere?
- Is the sale of hydrocarbon refrigerants legal?
- May hydrocarbon refrigerants be vented?
- What other regulations restrict the use and handling
of hydrocarbon refrigerants?
- Are there other refrigerants that can replace CFC-12?
- Is it legal to replace HFC-134a in a motor vehicle with
hydrocarbon refrigerants such as DURACOOL 12a® and HC-12a®?
Detailed Questions About HC-12a®, OZ-12®,
DURACOOL 12a® EC-12a, and other Flammable Hydrocarbon Refrigerants - What are HC-12a® and OZ-12®?
HC-12a® and OZ-12® brand hydrocarbon refrigerant blends are
flammable refrigerants. Their primary components are hydrocarbons, which
are flammable substances such as propane and butane. HC-12a® and
OZ-12® are registered trademarks of OZ Technology, Inc. HC-12a®
has been marketed since 1994. OZ-12® was a similar blend marketed
until the introduction of HC-12a® . Both products have been reviewed
by EPA under theSignificant New
Alternatives Policy(SNAP) program. More information about the SNAP
program is available from the hotline listed at the top of this page.Note that EPA refers to the chemical composition of HC-12a®
as Hydrocarbon Blend B. EPA considers any substance with that chemical
composition, no matter what its trade name is, to be Hydrocarbon Blend
B and to have the same legal status that HC-12a® has. In order to meet Department of Transportation requirements for shipping
HC-12a® in six-ounce cans (DOT refers to these cans as DOT 2Q
containers), OZ Technology reduced the vapor pressure of HC-12a®
in June, 1998 by changing the composition. EPA does not consider this
reformulated HC-12a® to be the same as Hydrocarbon Blend B. The
reformulated HC-12a® has not been submitted for SNAP review, and
thus cannot be marketed or used as a substitute for ozone-depleting
substances. - What is DURACOOL 12a®? Is there a difference
between HC-12a® and DURACOOL 12a®?
DURACOOL 12a® has the same chemical composition as the HC-12a®
formulation that was submitted for SNAP review and was called Hydrocarbon
Blend B. Both HC-12a® and DURACOOL 12a® are different than the
new formulation of HC-12a® in six-ounce cans. DURACOOL 12a®
is the registered trademark of Duracool Limited, the Canadian company
that has manufactured DURACOOL 12a® since 1997. Duracool Limited
and OZ Technology, the manufacturer of HC-12a®, are separate, unrelated
companies with their own manufacturing facilities and distribution mechanisms. - What is the legal status of hydrocarbon refrigerants
such as HC-12a® and DURACOOL®?
It has been illegal since July 13, 1995 to replace CFC-12 with the HC-12a®
formulation that was submitted for SNAP review in any refrigeration
or A/C application other than industrial process refrigeration. The
same prohibition for OZ-12® took effect on April 18, 1994. Because
DURACOOL 12a® has the same chemical composition as the HC-12a®
formulation that was submitted for SNAP review (i.e., Hydrocarbon Blend
B), DURACOOL 12a® is also subject to the same restrictions.HC-12a®, as reformulated to meet DOT requirements, is not the
same as Hydrocarbon Blend B and has not been submitted for SNAP review.
OZ Technology is therefore prohibited frommarketingthis blend
as a substitute for any ozone-depleting substance. In addition, anyuseof this blend as a substitute for CFC-12 or any other ozone-depleting
chemical, in industrial process refrigeration or any other refrigeration
or A/C end use, is prohibited under the Clean Air Act. Since HC-12a®, as submitted for SNAP review, is chemically
different from HC-12a®, as reformulated to meet DOT requirements,
and since it has a different legal status under the Clean Air Act,
users of any substance marketed as HC-12a® should be aware of
which HC-12a® they have purchased. Note that the Clean Air Act does not regulate the use of any of
these hydrocarbon refrigerants when they are used as replacements
for non-ozone-depleting chemicals such as HFC-134a. However, many
states prohibit using flammable refrigerants in motor vehicles, regardless
of which original refrigerant was used in the vehicle. - May hydrocarbon refrigerants be used to replaceCFC-12, commonly referred to as "Freon® ,"
in cars?
No. It is illegal to use hydrocarbon refrigerants like HC-12a® and
DURACOOL 12a® as substitutes for CFC-12 in automobile or truck air
conditioning under any circumstances. - Why is it legal to use hydrocarbon refrigerants as
CFC-12 substitutes in industrial process refrigeration, but not elsewhere?
EPA has not yet received data that adequately address the safety issues
of hydrocarbon refrigerants in applications other than industrial process
refrigeration. Flammability risks depend on the type of refrigeration
or air-conditioning system. Industrial process refrigeration, for instance,
does not include air conditioning, which pipes refrigerated air directly
into occupied areas. Industrial process refrigeration generally refers
to complex customized appliances used in the chemical, pharmaceutical,
petrochemical and manufacturing industries. Direct risk to human health
is reduced in industrial process refrigeration; for example, access
to areas near the system is typically restricted. In addition, other
regulations exist to protect the safety of industrial workers.EPA will review any additional material that is submitted under
SNAP regarding the safety considerations of using hydrocarbon refrigerants
in systems other than industrial process refrigeration. - Is sale of hydrocarbon refrigerants legal?
Sale of subtitute refrigerants listed under the SNAP program is not
regulated under SNAP. However, statutes and regulations issued by other
federal, state, or local agencies may control the sale of these products,
including illegal advertising. - May hydrocarbon refrigerants be vented?
No. Since November 15, 1995, theClean
Air Acthas prohibited the venting of any refrigerant during the
service, maintenance, repair, or disposal of air conditioning and refrigeration
systems. When working on a system containing a hydrocarbon refrigerant
such as HC-12a® or DURACOOL 12a®, the technician must recover
the refrigerant into a suitable container and safely dispose of it. - What other regulations restrict the use and handling
of hydrocarbon refrigerants?
In addition to the prohibition on use described above, and the federal
law banning the venting of all refrigerants, there are also state and
local statutes and regulations that relate to certain uses of hydrocarbons.
As of the printing date of this fact sheet, EPA is aware that the following
states prohibit the use of flammable refrigerants in automobile air
conditioners: Arkansas, Arizona, Connecticut, Florida, Idaho, Iowa,
Indiana, Kansas, Louisiana, Maryland, North Dakota, Oklahoma, Texas,
Utah, Virginia, Washington, Wisconsin, and the District of Columbia.Local fire codes also often restrict the storage of flammable materials.
In addition, other federal, state, and local regulatory agencies may
have regulations related to flammable refrigerants. Check with these
authorities for more information. - Are there other refrigerants that can replace CFC-12?
Yes. Numerous other refrigerants have been found acceptable, subject
to certain conditions on their use. EPA's fact sheet titled "Choosing
and Using Alternative Refrigerants for Motor Vehicle Air Conditioning"
lists these refrigerants and discusses the conditions.Lists of alternativesin other sectors are available
online and from our hotline at 800-296-1996. - Is it legal to replace HFC-134a in a motor vehicle
with hydrocarbon refrigerants such as DURACOOL 12a® and HC-12a®?
In certain circumstances, the replacement of HFC-134a in a motor vehicle
with hydrocarbon refrigerants might be permitted. At a minimum, in order
to avoid violating the Clean Air Act, the motor vehicle A/C system must
have either been originally designed for use with HFC-134a refrigerant,
or must have been previously retrofitted from CFC-12 to HFC-134a refrigerant,
AND no sham retrofit must have occurred to convert the system to the
hydrocarbon refrigerant. In order to avoid violating other laws, the
replacement of the refrigerant must not violate any state or local prohibition
on the use of flammable refrigerants in motor vehicle A/C systems.The following 18 states ban the use of flammable refrigerants such
as HC-12a® and DURACOOL 12a® in motor vehicle air conditioning,
regardless of the original refrigerant: Arkansas, Arizona, Connecticut,
Florida, Idaho, Indiana, Iowa, Kansas, Louisiana, Maryland, North
Dakota, Oklahoma, Texas, Utah, Virginia, Wisconsin, Washington, and
the District of Columbia. EPA and hotline staff will not, based solely on facts given in a
phone call or letter, determine the legality under the SNAP program
of using a hydrocarbon refrigerant in a motor vehicle retrofitted
to use HFC-134a, because the determination depends on many factors,
including the nature of the retrofit from CFC-12 to HFC-134a, the
reason for the retrofit, and the exact procedure and timing involved. If you plan to change a car from HFC-134a to a hydrocarbon refrigerant
such as HC-12a® and DURACOOL 12a®, you should consider that
auto manufacturers have stated that changing the refrigerant in new
vehicles designed for use with HFC-134a will void the warranty and
may damage the system. If the air conditioner on a new car or truck
is not working, consult a qualified mechanic or your dealer.
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