ANNEX VI

The GWP of a mixture is calculated as a weighted average, derived from the sum of the weight fractions of the individual substances multiplied by their GWP, unless otherwise specified, including substances that are not fluorinated greenhouse gases. Σ (Substance × % × GWP) + (Substance Y % × GWP) + … (Substance N % × GWP), where % is the contribution by weight with a weight tolerance of +/– 1 %. For example: applying the formula to a mixture of gases consisting of 60 % dimethyl ether, 10 % HFC-152a and 30 % isobutane: | Σ (60 % × 1) + (10 % × 124) + (30 % × 0) | Total GWP = 13,0 The GWP of the following non-fluorinated substances are used to calculate the GWP of mixtures. For other substances not listed in this annex a default value of 0 applies. Only emissible components that fulfil broadly the same function are relevant for the calculation of the GWP. Substance | GWP 100 (1) Common name | Industrial designation | Chemical Formula methane | | CH4 | 27,9 nitrous oxide | | N2O | 273 dimethyl ether | | CH3OCH3 | 1 (2) methylene chloride | | CH2Cl2 | 11,2 methyl chloride | | CH3Cl | 5,54 chloroform | | CHC13 | 20,6 ethane | R-170 | CH3CH3 | 0,437 propane | R-290 | CH3CH2CH3 | 0,02 butane | R-600 | CH3CH2CH2CH3 | 0,006 isobutane | R-600a | CH(CH3)2CH3 | 0 (3) pentane | R-601 | CH3CH2CH2CH2CH3 | 0 (3) isopentane | R-601a | (CH3)2CHCH2CH3 | 0 (3) ethoxyethane (diethyl ether) | R-610 | CH3CH2OCH2CH3 | 4 (2) methyl formate | R-611 | HCOOCH3 | 11 (4) hydrogen | R-702 | H2 | 6 (2) ammonia | R-717 | NH3 | 0 ethylene | R-1150 | C2H4 | 4 (2) propene | R-1270 | C3H6 | 0 (3) cyclopentane | | C5H10 | 0 (3)

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Source: EUR-Lex (Cellar) · retrieved 2026-11-07 · Text as adopted (Official Journal); later amendments are not incorporated in this text.