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§84.64 Global warming potentials.

RegSenseOzone Depleting SubstancesCFR RegulationsEnvironmental Protection Agency (EPA)Air ProgramsEnvironmentalAir QualityCFR SectionEnglishFocus AreaUSA

(a) The global warming potential of a regulated substance is the exchange value for the regulated substance listed in subsection (c) of the AIM Act and in appendix A to this part 84.

(b) For blends containing a regulated substance, the global warming potential of the blend is the sum of the global warming potentials of each constituent of the blend multiplied by the nominal mass fraction of that constituent within the blend. The global warming potential of each constituent shall be as follows:

Table 1 to Paragraph (b)
Substance name 100-Year global warming potential
2-chloropropane1
Acetone0.5
Acetone/isopentane blend1
Dimethyl ether1
Formic acid5
HCFO–1224yd(Z)1
HCFO–1233yd(Z)1
HCFO–1233zd(E)4
HCO–1130(E)5
HFE–347pcf2987
HFE–449s1 (HFE–7100)297
HFE–569sf259
HFO–1234yf1
HFO–1234ze(E)1
HFO–1336mzz(E)26
HFO–1336mzz(Z)2
Hydrocarbons (C5–C20)1–2.7
Methoxytridecafluoroheptane (MPHE) isomers2.5
Methyl formate13
Methylal (dimethoxymethane)1
Oxygenated organic solvents (esters, ethers, alcohols, ketones)1–13
R–170 (ethane)5.5
R–290 (propane)3.3
R–600 (butane)4
R–600a (isobutane)1
R–717 (ammonia)1
R–744 (carbon dioxide)1
R–1150 (ethylene)3.7
R–1270 (propylene)1.8
Saturated light hydrocarbons (C3–C6)1–4

(c) For constituents of a blend containing a regulated substance that do not have a global warming potential as provided in paragraph (b) of this section, the constituent and its nominal mass fraction in the blend shall be excluded from the calculation in paragraph (b).

[88 FR 73205, Oct. 24, 2023]

['Air Programs']
['Ozone Depleting Substances']
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