Significant New Alternatives Policy (SNAP)

Acceptable Substitutes in Cold Storage Warehouses

You will need Adobe Reader to view some of the files on this page. See EPA’s About PDF page to learn more.Substitutes are reviewed on the basis of environmental and health risks, including factors such as ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential. Lists of acceptableHelpacceptableThis designation means that a substitute may be used, without restriction, to replace the relevant ODS within the end-use specified. For example, HCFC-22 is an acceptable substitute for R-502 in industrial process refrigeration. Note that all SNAP determinations apply to the use of a specific product as a substitute for a specific ODS in a specific end-use. and unacceptableHelpUnacceptableThis designation means that it is illegal to use a product as a substitute for an ODS in a specific end-use. For example, HCFC-141b is an unacceptable substitute for CFC-11 in building chillers. Note that all SNAP determinations apply to the use of a specific product as a substitute for a specific ODS in a specific end-use. substitutes are updated several times each year. The list of acceptable substitutes are shown below.

Note: SNAP-related information published in the Federal Register takes precedence over all information on this page.

               
Substitute Trade Name Retrofit/New ODPHelpODPA number that refers to the amount of ozone depletion caused by a substance. The ODP is the ratio of the impact on ozone of a chemical compared to the impact of a similar mass of CFC-11. Thus, the ODP of CFC-11 is defined to be 1.0. Other CFCs and HCFCs have ODPs that range from 0.01 to 1.0. The halons have ODPs ranging up to 10. Carbon tetrachloride has an ODP of 1.2, and methyl chloroform's ODP is 0.11. HFCs have zero ODP because they do not contain chlorine. A table of all ozone-depleting substances (http://www.epa.gov/ozone/science/ods/index.html) shows their ODPs, GWPs, and CAS numbers. GWPHelpGWPThe index used to translate the level of emissions of various gases into a common measure in order to compare the relative radiative forcing of different gases without directly calculating the changes in atmospheric concentrations. GWPs are calculated as the ratio of the radiative forcing that would result from the emissions of one kilogram of a greenhouse gas to that from the emission of one kilogram of carbon dioxide over a period of time (usually 100 years). Gases involved in complex atmospheric chemical processes have not been assigned GWPs. See lifetime. ASHRAEHelpASHRAEASHRAE is an international organization that establishes standards for the uniform testing and rating of heating, ventilation, air conditioning, and refrigeration equipment. It also conducts related research, disseminates publications, and provides continuing education to its members.
Designation
(Safety
Classification)
SNAP Listing Date Use Conditions
Ammonia Absorption   N 0 0 B2 September 5, 1996  
Ammonia Vapor Compression   N 0 0 B2 March 18, 1994;
September 5, 1996
 
Desiccant Cooling   N 0 N/A N/A March 18, 1994;
June 16, 2010
 
Evaporative Cooling   N 0 N/A N/A March 18, 1994;
June 16, 2010
 
FOR12A FOR12A R/N 0 1,100 A1 December 18, 2000  
FOR12B FOR12B R/N 0 1,000 A1 December 18, 2000  
Free Zone (HCFC Blend Delta) Free Zone/ RB-276 R/N 0.013 1,592 A1 September 5, 1996  
Freeze 12 Freeze 12 R/N 0.013 1,606 A1 September 5, 1996  
FRIGC FR-12 (HCFC Blend Beta) FRIGC FR-12 R/N 0.009 1,081 A1 February 8, 1996;
February 24, 1998
 
G2018C G2018C R/N 0.053 1,731 A1 September 5, 1996  
GHG-HP (HCFC Blend Lambda) GHG-HP R/N 0.056 1,893 A1 February 8, 1996  
GHG-X4 GHG-X4, Autofrost, Chill-it R/N 0.045 1,478 A1 September 5, 1996  
GHG-X5 GHG-X5 R/N 0.032 2,377 A1 June 3, 1997  
HCFC-22 22 R/N 0.055 1,810 A1 March 18, 1994  
HCFC-22/HCFC-142b   R/N 0.055-0.065 1,810-2,310 A1 June 3, 1997  
HFC-134a 134a R/N 0 1,430 A1 March 18, 1994;
June 16, 2010
 
HFC-134a/HBr (92/8)   N 0.0016 N/A A1 May 23, 2001 Only acceptable for use as the primary heat transfer fluid in secondary-loop equipment for not-in-kind replacements.
HFC-227ea   N 0 3,220 A1 March 18, 1994;
June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
Hot Shot Hot Shot, Kar Kool R/N 0.098 3,337 A1 September 5, 1996  
Hot Shot 2  Hot Shot 2 R 0 1,820 A1 October 4, 2011  
Ikon A Ikon-12, Blend Zeta N 0 N/A A1 June 19, 2000  
Ikon B   R/N 0 N/A A1 December 6, 1999  
Pressure stepdown   N 0 0 N/A March 18, 1994;
June 16, 2010
 
R-125/R-290/R-134a/R-600a (55.0/1.0/42.5/1.5) ICOR AT-22 R/N 0 2,530 A1 March 29, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-401A SUVA MP-39 N 0.037 1,182 A1 January 13, 1995  
R-401B SUVA MP-66 R/N 0.040 1,288 A1 January 13, 1995  
R-402A HP-80 R/N 0.019 2,746 A1 March 18, 1994  
R-402B HP-81 R/N 0.03 2,379 A1 March 18, 1994  
R-404A HP-62 R/N 0 3,920 A1 March 18, 1994;
December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-406A GHG R 0.057 1,900 A2 August 26, 1994  
R-407A Klea 60, Klea 407A R/N 0 2,110 A1 August 26, 1994;
January 2, 2009;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-407B Klea 61 R/N 0 2,800 A1 August 26, 1994;
June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-407C Suva 407C, Klea 407C R/N 0 1,770 A1 February 8, 1996;
December 20, 2002;
August 21, 2003
 
R-407F  Genetron Performax LT R/N 0 1,820 A1 October 4, 2011  
R-408A (HCFC Blend Epsilon)   R 0.026 55 A1 August 26, 1994  
R-410A AZ-20, Suva 9100, Puron N 0 2,090 A1 February 8, 1996;
December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-410B   N 0 2,230 A1 February 8, 1996;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-411A   R/N 0.048 1,600 A2 February 8, 1996  
R-411B   R/N 0.052 1,700 A2 February 8, 1996  
R-417A ISCEON 59, NU-22 R/N 0 2,350 A1 December 6, 1999;
December 20, 2002;
June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-420A Choice R-420A R/N 0.008 1,536 A1 October 1, 2004  
R-421A Choice R-421A R/N 0 2,630 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-421B Choice R-421B R/N 0 3,190 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-422A ISCEON 79 R/N 0 3,140 A1 October 1, 2004;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-422B ICOR XAC1, NU-22B R/N 0 2,530 A1 March 29, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-422C ICOR XLT1 R/N 0 3,390 A1 March 29, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-422D ISCEON MO29 R/N 0 2,730 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-423A ISCEON 39TC R/N 0 2,280 A1 March 22, 2002;
June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-424A RS-44 R/N 0 2,440 A1 September 28, 2006;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-426A RS-24 R/N 0 1,510 A1 September 28, 2006;
June 16, 2010
 
R-428A RS-52 R/N 0 3,610 A1 October 4, 2007;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-434A RS-45 R/N 0 3,250 A1 October 4, 2007;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-437A KDD6, ISCEON MO49 Plus R/N 0 1,810 A1 January 2, 2009  
R-438A KDD5, ISCEON MO99 R/N 0 2,270 A1 June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-450A Solstice® N-13 R/N 0 601 A1 October 21, 2014  
R-1270 (Propylene)   N 0 1.8 A3 December 1, 2016 Unacceptable, as of January 3, 2017.
R-507, R-507A AZ-50 R/N 0 3,990 A1 March 18, 1994;
September 5, 1996;
December 20, 2002;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
R-513A Opteon® XP 10 R/N 0 630 A1 July 16, 2015  
R-744 (Carbon Dioxide, CO2)   N 0 1 A1 September 30, 2009  
R-443A   N 0 2.5 A3 December 1, 2016 Unacceptable, as of January 3, 2017.
RS-24 (2002 formulation)   R/N 0 1,510 A1 December 20, 2002;
June 16, 2010
 
RS-44 (2003 formulation)   R/N 0 2,420 A1 June 16, 2010;
December 1, 2016
Unacceptable in new equipment, as of January 1, 2023.
Self-chilling cans using CO2   N 0 1 A1 February 24, 1998  
SP34E SP34E R/N 0 <1,470 A1 December 18, 2000;
June 16, 2010
 
Stirling Cycle   N 0 N/A N/A June 16, 2010  
THR-02   R/N 0 N/A A1 December 6, 1999  
THR-03   R/N 0 N/A A1 December 6, 1999  
THR-04   R/N >0 N/A A1 June 8, 1999  

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