ENVIRONMENTAL DATA EMISSIONS DATA Appendix C 2021 Owens Corning Sustainability Report | Appendices | 318 TYPE LOCATIONS CALENDAR YEAR SOURCE Electricity - Market Residual Mix EU Countries 2021 Association of Issuing Bodies (AIB): European Residual Mix 2020 v1.0 Electricity - National Sources ROW* 2021 International Energy Agency (IEA): CO2 Emissions from Fuel Combustion 2020-Year 2018 Electricity - Market Residual Mix US 2021 2021 Green-e Residual Mix (2019 certified sales) Electricity - Location - Regional Sources US 2021 US EPA eGRID 2021 (w/2019 Data) Electricity - Market Residual Mix EU Countries 2020 Association of Issuing Bodies (AIB): European Residual Mix 2019 v1.0 Electricity - National Sources ROW* 2020 International Energy Agency (IEA): CO2 Emissions from Fuel Combustion 2020-Year 2018 Electricity - Market Residual Mix US 2020 2020 Green-e Residual Mix (2018 certified sales) Electricity - Location - Regional Sources US 2020 US EPA eGRID 2020 v2 (w/2018 Data) Electricity - Market Residual Mix EU Countries 2019 Association of Issuing Bodies (AIB): European Residual Mixes 2018 Electricity - National Sources ROW* 2019 International Energy Agency (IEA): CO2 Emissions from Fuel Combustion 2019-Year 2017 Electricity - Market Residual Mix US 2019 2019 Green-e Residual Mix (2017 certified sales) Electricity - Location - Regional Sources US 2019 US EPA eGRID 2018 (w/2016 data) Electricity - Market Residual Mix EU Countries 2018 Association of Issuing Bodies (AIB): European Residual Mixes 2018 Electricity - National Sources ROW* 2018 International Energy Agency (IEA): CO2 Emissions from Fuel Combustion 2018-Year 2016 Electricity - Market Residual Mix US 2018 2018 Green-e Residual Mix (2016 certified sales) Electricity - Location - Regional Sources US 2018 US EPA eGRID 2018 (w/2016 data) Leased Facilities Warehouse 2019-2021 Energy Star Portfolio Manager - U.S. Energy Use Intensity by Property Type; publication 8/2018 Leased Facilities Office/Other 2019-2021 Energy Star Portfolio Manager - U.S. Energy Use Intensity by Property Type; publication 8/2018 Leased Facilities Warehouse 2018 Energy Star Portfolio Manager - Energy Star Score for Warehouses in the United States; publication 7/13 Leased Facilities Office/Other 2018 Energy Star Portfolio Manager - Energy Use in Office Buildings; publication 10/2012 *ROW includes EU countries when using the location-based approach. Residual mix data from AIB is used in market-based emissions calculations only