Substitutes in Stand-alone Equipment
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 acceptableThis 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 unacceptableThis 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 substitutes is shown below.
Many acceptable substitutes under SNAP may be restricted under the Technology Transitions Program. For more information on Technology Transitions Program restrictions, visit: https://www.epa.gov/climate-hfcs-reduction/technology-transitions-program
Note: SNAP-related information published in the Federal Register takes precedence over all information on this page.
| Filters | |||||||
|---|---|---|---|---|---|---|---|
| Substitute | Trade Name(s) | Retrofit/ New |
ODPA 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 (https://www3.epa.gov/ozone/science/ods/index.html) shows their ODPs, GWPs, and CAS numbers. | GWPThe 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. | ASHRAEASHRAE 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 | Listing Status |
| Ammonia Vapor Compression with Secondary Loop | N | 0 | 0 | B2 | March 18, 1994; September 5, 1996 |
Acceptable | |
| FOR12A | FOR12A | R/N | 0 | 1,100 | A1 | December 18, 2000 (pdf) (257 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
| FOR12B | FOR12B | R/N | 0 | 1,000 | A1 | December 18, 2000 (pdf) (257 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
| RB-276 | Free Zone, HCFC Blend Delta | R/N | 0.013 | 1,592 | A1 | September 5, 1996 | Acceptable |
| Freeze 12 | Freeze 12 | R/N | 0.013 | 1,606 | A1 | September 5, 1996 | Acceptable |
| R-416A | FRIGC FR-12, HCFC Blend Beta | R/N | 0.009 | 1,081 | A1 | February 8, 1996 (pdf) (152 KB); February 24, 1998 (pdf) (140 KB) |
Acceptable |
| G2018C | G2018C | R/N | 0.053 | 1,731 | A1 | September 5, 1996 | Acceptable |
| GHG-HP | HCFC Blend Lambda | R/N | 0.056 | 1,893 | A1 | February 8, 1996 (pdf) (152 KB) | Acceptable |
| R-414A | GHG-X4, Autofrost, Chill-it, HCFC Blend Xi | R/N | 0.045 | 1,478 | A1 | September 5, 1996 | Acceptable |
| GHG-X5 | GHG-X5 | R/N | 0.032 | 2,377 | A1 | June 3, 1997 (pdf) (133 KB) | Acceptable |
| HCFC-22 | R/N | 0.055 | 1,810 | A1 | March 18, 1994 | Acceptable | |
| HCFC-22/HCFC-142b | R/N | 0.055-0.065 | 1,810-2,310 | A1 | June 3, 1997 (pdf) (133 KB) | Acceptable | |
| HFC-134a | R/N | 0 | 1,430 | A1 | March 18, 1994; July 20, 2015 (pdf)(687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
|
| HFC-134a/HBr (92/8) | N | 0.0016 | N/A | A1 | May 23, 2001 (pdf) (145 KB) | Acceptable: 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; July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
|
| HFE-449s1 (methoxynonafluorobutane, iso and normal) | Novec™ 7100 Engineered Fluid (HFE-7100) | N | 0 | 297 | A1 | December 18, 2000 (pdf) (257 KB); June 16, 2010 (pdf) (229 KB) |
Acceptable: Only acceptable for use as a secondary heat transfer fluid in not-in-kind systems. |
| HFE-569sf2 (ethoxynonafluorobutane, iso and normal) | Novec™ 7200 Engineered Fluid (HFE-7200) | N | 0 | 59 | N/A | December 18, 2000 (pdf) (257 KB); June 16, 2010 (pdf) (229 KB) |
Acceptable: Only acceptable for use as a secondary heat transfer fluid in not-in-kind systems. |
| R-414B | Hot Shot, Kar Kool, HCFC Blend Omicron | R/N | 0.098 | 3,337 | A1 | September 5, 1996 | Acceptable |
| R-417C | Hot Shot 2 | R | 0 | 1,820 | A1 | October 4, 2011 (pdf) (201 KB) | Acceptable |
| Ikon A | Ikon-12, Blend Zeta | R/N | 0 | N/A | A1 | June 19, 2000 (pdf) (224 KB) | Acceptable |
| Ikon B | R/N | 0 | N/A | A1 | December 6, 1999 (pdf) (226 KB) | Acceptable | |
| 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 | June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-290 (Propane) | N | 0 | 3 | A3 | December 20, 2011 (pdf) (297 KB); June 13, 2024 (pdf) (1.2 MB) |
Acceptable subject to use conditions: See rule for detailed conditions. | |
| R-401A | SUVA MP-39 | N | 0.037 | 1,182 | A1 | January 13, 1995 (pdf) (186 KB) | Acceptable |
| R-401B | SUVA MP-66 | N | 0.040 | 1,288 | A1 | January 13, 1995 (pdf) (186 KB) | Acceptable |
| R-402A | HP-80 | R/N | 0.019 | 2,746 | A1 | March 18, 1994 | Acceptable |
| R-402B | HP-81 | R/N | 0.03 | 2,379 | A1 | March 18, 1994 | Acceptable |
| R-404A | SUVA HP-62 | R/N | 0 | 3,920 | A1 | March 18, 1994; December 20, 2002 (pdf) (168 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in retrofit equipment as of July 20, 2016. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-406A | GHG-12, GHG-X3, McCool, Autofrost X3 | R | 0.057 | 1,900 | A2 | August 26, 1994 | Acceptable |
| R-407A | Klea 60, Klea 407A | R/N | 0 | 2,110 | A1 | August 26, 1994; January 2, 2009 (pdf) (173 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-407B | Klea 61 | R/N | 0 | 2,800 | A1 | August 26, 1994; June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-407C | Suva 407C, Klea 407C | R/N | 0 | 1,770 | A1 | February 8, 1996 (pdf) (152 KB); December 20, 2002 (pdf) (168 KB); August 21, 2003 (pdf) (161 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-407F | Genetron Performax LT | R/N | 0 | 1,820 | A1 | October 4, 2011 (pdf) (201 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-408A | HCFC Blend Epsilon | R | 0.026 | 3,152 | A1 | August 26, 1994 | Acceptable |
| R-409A | HCFC Blend Gamma | R | 0.047 | 1,558 | A1 | August 26, 1994 | Acceptable |
| R-410A | AZ-20, Suva 9100, Puron | N | 0 | 2,090 | A1 | February 8, 1996 (pdf) (152 KB); December 20, 2002 (pdf) (168 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-410B | N | 0 | 2,230 | A1 | February 8, 1996 (pdf) (152 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
|
| R-411A | R/N | 0.048 | 1,600 | A2 | February 8, 1996 (pdf) (152 KB) | Acceptable | |
| R-411B | R/N | 0.052 | 1,700 | A2 | February 8, 1996 (pdf) (152 KB) | Acceptable | |
| R-417A | ISCEON 59, NU-22 | R/N | 0 | 2,350 | A1 | December 6, 1999 (pdf) (226 KB); December 20, 2002 (pdf) (168 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-420A | Choice R-420A | R/N | 0.008 | 1,536 | A1 | October 1, 2004 (pdf) (186 KB) | Acceptable |
| R-421A | Choice R-421A | R/N | 0 | 2,630 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-421B | Choice R-421B | R/N | 0 | 3,190 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-422A | ISCEON 79 | R/N | 0 | 3,140 | A1 | October 1, 2004 (pdf) (186 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-422B | ICOR XAC1, NU-22B | R/N | 0 | 2,530 | A1 | March 29, 2006 (pdf) (181 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-422C | ICOR XLT1 | R/N | 0 | 3,390 | A1 | March 29, 2006 (pdf) (181 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-422D | ISCEON MO29 | R/N | 0 | 2,730 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-424A | RS-44 | R/N | 0 | 2,440 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-426A | RS-24 | R/N | 0 | 1,510 | A1 | September 28, 2006 (pdf) (183 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable innew Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. > Unacceptable innew Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
| R-427A | Forane® 427A | R | 0 | 2,140 | A1 | January 2, 2009 (pdf) (173 KB); June 16, 2010 (pdf) (229 KB) |
Acceptable |
| R-428A | RS-52 | R/N | 0 | 3,610 | A1 | October 4, 2007 (pdf) (163 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-434A | RS-45 | R/N | 0 | 3,250 | A1 | October 4, 2007 (pdf) (163 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-437A | KDD6, ISCEON MO49 Plus | R/N | 0 | 1,810 | A1 | January 2, 2009 (pdf) (173 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-438A | KDD5, ISCEON MO99 | R/N | 0 | 2,270 | A1 | October 4, 2007 (pdf) (163 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-441A | N | 0 | <5 | A3 | April 10, 2015 (pdf) (769 KB) | Acceptable with Use Conditions: Detailed conditions apply - see Rule | |
| R-448A | Solstice® N-40 | R/N | 0 | 1,390 | A1 | July 16, 2015 (pdf) (354 KB); May 6, 2021 (pdf) (583 KB) |
Acceptable: Low temperature (i.e., temperatures at or below 32°F (0 °C)) stand-alone equipment only. Acceptable with Narrowed Use Limits: New medium- temperature (i.e., temperatures above 32°F (0 °C)) stand-alone equipment only. See May 6, 2021 (pdf) (583KB) rule for detailed use limits. |
| R-449A | Opteon™ XP 40 | R/N | 0 | 1,400 | A1 | July 16, 2015 (pdf) (354 KB); May 6, 2021 (pdf) (583 KB) |
Acceptable: Low temperature (i.e., temperatures at or below 32°F (0 °C)) stand-alone equipment only. Acceptable with Narrowed Use Limits: New medium- temperature (i.e., temperatures above 32°F (0 °C)) stand-alone equipment only. See May 6, 2021 (pdf) (583KB) rule for detailed use limits. |
| R-449B | Forane® 449B | R/N | 0 | 1,410 | A1 | October 11, 2016 (pdf) (284 KB); May 6, 2021 (pdf) (583 KB) |
Acceptable: Low temperature (i.e., temperatures at or below 32°F (0 °C)) stand-alone equipment only. Acceptable with Narrowed Use Limits: New medium- temperature (i.e., temperatures above 32°F (0 °C)) stand-alone equipment only. See May 6, 2021 (pdf) (583KB) rule for detailed use limits. |
| R-450A | Solstice® N-13 | R/N | 0 | 601 | A1 | October 21, 2014 (pdf) (346 KB) | Acceptable |
| R-471A | Solstice® N71 | N | 0 | 144 | A1 | September 8, 2023 (pdf) (247 KB) | Acceptable |
| R-507, R-507A | AZ-50 | R/N | 0 | 3,990 | A1 | March 18, 1994; December 20, 2002 (pdf) (168 KB); September 30, 2009 (pdf) (173 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in retrofit equipment as of July 20, 2016. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
| R-513A | Opteon™ XP 10 | R/N | 0 | 630 | A1 | July 16, 2015 (pdf) (354 KB) | Acceptable with Use Conditions: Low temperature (i.e., temperatures at or below 32°F (0 °C)) and medium temperature (i.e., temperatures above 32°F (0 °C)) stand-alone equipment. |
| R-600a (Isobutane) | N | 0 | 3 | A3 | April 10, 2015 (pdf) (769 KB) | Acceptable with Use Conditions: Detailed conditions apply - see Rule | |
| R-744 (Carbon Dioxide, CO2) | N | 0 | 1 | A1 | September 30, 2009 (pdf) (173 KB) | Acceptable | |
| RS-24 (2002 formulation) | R/N | 0 | 1,510 | A1 | December 20, 2002 (pdf) (168 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
|
| RS-44 (2003 formulation) | R/N | 0 | 2,420 | A1 | June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. Unacceptable in new Stand-Alone Low-Temperature Units as of January 1, 2020. |
|
| Self-chilling cans using CO2 | N | 0 | 1 | A1 | February 24, 1998 (pdf) (140 KB) | Acceptable | |
| SP34E | SP34E | R/N | 0 | <1,470 | A1 | December 18, 2000 (pdf) (257 KB); June 16, 2010 (pdf) (229 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
| THR-02 | R/N | 0 | N/A | A1 | December 6, 1999 (pdf) (226 KB) | Acceptable | |
| THR-03 | R/N | 0 | N/A | A1 | December 6, 1999 (pdf) (226 KB); July 20, 2015 (pdf) (687 KB) |
Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity below 2,200 Btu/hour and not containing a flooded evaporator as of January 1, 2019. Unacceptable in new Stand-Alone Medium-Temperature Units with a compressor capacity equal to or greater than 2,200 Btu/hour and Stand-Alone Medium-Temperature Units containing a flooded evaporator as of January 1, 2020. |
|
| THR-04 | R/N | >0 | N/A | A1 | June 8, 1999 (pdf) (143 KB) | Acceptable | |
| HFO-1234yf | N | 0 | 1 | A2L | June 13, 2024 (pdf) (1.2 MB) | Acceptable subject to use conditions: See rule for detailed conditions. | |
| HFO-1234ze(E) | N | 0 | 1 | A2L | June 13, 2024 (pdf) (1.2 MB) | Acceptable subject to use conditions: See rule for detailed conditions. | |
| R-454C | Opteon™ XL20 | N | 0 | 146 | A2L | June 13, 2024 (pdf) (1.2 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
| R-455A | Solstice® L40X | N | 0 | 146 | A2L | June 13, 2024 (pdf) (1.2 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
| R-457A | Forane® 457A | N | 0 | 137 | A2L | June 13, 2024 (pdf) (1.2 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
| R-516A | Forane® 516A | N | 0 | 140 | A2L | June 13, 2024 (pdf) (1.2 MB) | Acceptable subject to use conditions: See rule for detailed conditions. |
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