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Acceptable Substitutes in Household and Light Commercial Air Conditioning
Substitutes are reviewed on the basis of ozone depletion potential, global warming potential, toxicity, flammability, and exposure potential. Lists of acceptable and unacceptable substitutes are updated several times each year. A chronological list of SNAP updates is also available.
Unacceptable substitutesNote: SNAP-related information published in the Federal Register takes precedence over all information on this page.
Acceptable Substitutes for CFCs (class I ODS) in Household & Light Commercial AC
| Substitute (Name Used in the Federal Register) | Trade Name | Refrigerant Being Replaced | Retrofit/ New |
|---|---|---|---|
| Evaporative/Desiccant Cooling | all CFCs | N | |
| R-407C | Suva 407C, Klea 407C | 502 | R, N |
| R-422C | ICOR XLT1 | 502 | R, N |
| KDD6 | KDD6 | 12 | R, N |
| Hot Shot 2 | Hot Shot 2 | 12, 502 | R |
Key: R = Retrofit Uses, N = New
Uses
Acceptable Substitutes for HCFCs (class II ODS) in Household & Light Commercial AC
| Substitute (Name Used in the Federal Register) | Trade Name | Refrigerant Being Replaced | Retrofit/ New |
|---|---|---|---|
| HFC-134a | 22, blends containing 22 and/or 142b | N | |
| THR-03 | 22 | N
NOTE: this determination applies ONLY to window-unit residential AC, and not to central AC systems. |
|
| ISCEON 59, NU-22, R-417A | ISCEON 59, NU-22 | 22, blends containing 22 and/or 142b | R, N |
| R-410A | AZ-20, Suva 9100, Puron | 22 and blends containing HCFCs | N |
| R-410B | 22, blends containing 22 and/or 142b | N | |
| R-407C | Suva 9000, Klea 66 | 22 and blends containing HCFCs | R, N |
| R-507, R-507A | AZ-50 | 22 and blends containing HCFCs | R, N |
| Ammonia Absorption | 22, blends containing 22 and/or 142b | N | |
| Evaporative Cooling | 22, blends containing 22 and/or 142b | N | |
| Desiccant Cooling | 22, blends containing 22 and/or 142b | N | |
| R-404A | HP62 | 22 and blends containing HCFCs | R, N |
| R-125/134a/600a (28.1/70.0/1.9) | NU-22 old composition | 22, blends containing 22 and/or 142b | R, N |
| RS-44 (2003 formulation) | RS-44 (2003 formulation) | 22, blends containing 22 and/or 142b | R, N |
| R-421A | Choice R421A | 22, blends containing 22 and/or 142b | R, N |
| R-422D | ISCEON MO29 | 22, blends containing 22 and/or 142b | R, N |
| R-424A | RS-44 | 22, blends containing 22 and/or 142b | R, N |
| R-125/290/134a/600a (55.0/1.0/42.5/1.5) | ICOR AT-22 | 22, blends containing 22 and/or 142b | R, N |
| R-422C | ICOR XLT1 | 22, blends containing 22 and/or 142b | R, N |
| R-422B | ICOR XAC1, NU-22B | 22, blends containing 22 and/or 142b | R, N |
| KDD5, R-438A | ISCEON MO99 | 22, blends containing 22 and/or 142b | R, N |
| R-434A | RS-45 | 22, blends containing 22 and/or 142b | R, N |
| R-407A | KLEA 60, KLEA 407A | 22 and blends containing HCFCs | R, N |
| R-427A | Forane 427A | 22, blends containing 22 and/or 142b | R |
| R-437A | ISCEON MO49 Plus | 22, blends containing 22 and/or 142b | R, N |
| Hot Shot 2 | Hot Shot 2 | 22, blends containing 22 and/or 142b | R |
| R-407F | Genetron Performax LT | 22, blends containing 22 and/or 142b | R, N |
Key: R = Retrofit Uses, N = New
Uses