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 substitutes
Note: 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
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 |
Key: R = Retrofit Uses, N = New
Uses
Acceptable Substitutes for HCFCs (class II ODS)
in Household & Light Commercial AC
HFC-134a |
|
22 |
N |
THR-03 |
|
22 |
N
NOTE: this determination applies ONLY to
window-unit residential air conditioning, and not to
central air conditioning systems. |
ISCEON
59, NU-22, R-417A |
Isceon 59, NU-22 |
22 |
R, N |
R-410A,
R-410B |
AZ-20,
Suva 9100, Puron |
22 |
N |
R-407C |
Suva 9000,
Klea 66 |
22 |
R, N |
R-507,
R-507A |
AZ-50 |
22 |
R, N |
NU-22 |
NU-22 |
22 |
R, N |
Ammonia
Absorption |
|
22 |
N |
Evaporative/Desiccant Cooling |
|
all
HCFCs |
N |
R-404A |
HP62 |
22 |
R, N |
R-125/134a/600a (28.1/70.0/1.9) |
|
22 |
R, N |
RS-44 |
RS-44 |
22 |
R, N |
R-421A |
Choice
R421A |
22 |
R, N |
R-422D |
ISCEON
MO29 |
22 |
R, N |
R-424A |
RS-44 |
22 |
R, N |
R-125/290/134a/600a (55.0/1.0/42.5/1.5) |
ICOR
AT-22 |
22 |
R, N |
R-422C |
ICOR
XLT1 |
22 |
R, N |
R-422B |
ICOR
XAC1 |
22 |
R, N |
KDD5 |
KDD5 |
22 |
R, N |
R-434A |
RS-45 |
22 |
R, N |
R-125/290/134a/600a (55.0/1.0/42.5/1.5) |
ICOR AT-22 |
22 |
R, N |
R-422B |
XAC1, NU-22B |
22 |
R, N |
R-422C |
XLT1 |
22, 402A, 402B, 408A |
R, N |
R-407A |
KLEA 60, KLEA 407A |
22, 22 blends including R-401A, -401B, -402A, and -402B |
R, N |
R-427A |
Forane 427A |
22 |
R |
Key: R = Retrofit Uses, N = New
Uses |