Sustainability Report 2022

A3 Conversion factors for CO2 emissions

For the calculation of CO2 emissions, emission factors per energy source are required in order to convert consumption figures into an emission level. The emission factors used for each energy source are shown in the table below. CO2 emissions are calculated in accordance with the Greenhouse Gas Standard. The operational control approach is used as a basis. In addition, the greenhouse gases of the Kyoto Protocol are included in the calculation of CO2 equivalents. Emissions are currently determined using the location-based method and the market-based method. If specific emission factors provided by the supplier are available, these are used to calculate the emission values according to the market-based method.

Emission factors used to calculate CO2 emissions
Energy source Unit Emission factor CO2 emissions (kg per unit)
Biogas m3 0.000
Natural gas kWh 0.202
LPG (Liquefied Petroleum Gas) Liters 1.904
Wood chips kWh 0.024
Heating oil kWh 0.266
Pellets kWh 0.023
Biomass wood kWh 0.029
Gas kWh 0.264
Diesel kWh 0.266
District heating* kWh 0.280
Electricity** kWh country-specific electricity mix
Renewable energies (self-generated) kWh 0.000
* District heating: In real terms, emissions in the district heating sector can deviate significantly upwards or downwards depending on the generator’s source. When calculating CO2 emissions, it is possible to use the real emission value, provided that corresponding evidence is provided via the calculation method.
** For the emission factor for electricity, the respective country electricity mix of the individual countries was used. Data from the Verband der Automobilindustrie e.V. (Association of the Automotive Industry) and thinkstep AG provided the basis for this; (source: VDA, thinkstep AG: ; “Emission factors for electricity, district heating and fuels”, June 2019).

The emission factors come from freely available specialist literature and are based on the “Information Sheet CO2 Factors” of the Federal Office of Economics and Export Control. The determination of emissions due to the use of refrigerants has so far been dispensed with due to the low relevance.

GRI Index