2021 Owens Corning Sustainability Report | Reducing Our Environmental Footprint | Energy Efficiency | 143 Energy Consumption In 2021, Owens Corning increased its overall consumption of direct energy — including the fuel usage in operation — by 8.3% from 2020. We increased consumption of indirect energy, which includes the use of electricity, steam, and district heating, by 9.6%.  Electricity (MWh) in millions  Normalized Value (MWh per MM Revenue) Indirect Energy — Percent of Renewable Electricity In 2021, approximately 51% of our electricity came from renewable sources, representing continued progress toward our goal in a year of increased production and corresponding electricity consumption. 2020 2019 2018  Direct energy  Indirect energy 10,719,236 10,274,193 9,658,731 10,499,961 2021 Energy usage is correlated to production. 3,550,868 3,291,072 3,168,546 3,474,087 7,168,369 6,983,121 6,490,185 7,025,874 Normalized Electric Power 2021 Renewable Electricity by Type As we make progress towards our 2030 goal for 100% renewable electricity, we track inputs from a number of types of sources, all of which contribute to our total 2021 renewable electricity consumption of 1,765,478 MWh, equal to 51% of our total electricity consumption.  Behind-the-Meter: Renewable installations that are directly consumed by Owens Corning without coming from the grid.  Site-Specific EAC: Guarantees of origin that cover all electricity demand for a site.  EACs from Large-Scale PPAs: EACs associated with Owens Corning’s PPAs which inject renewable power directly into the grid.  Residual Grid Mix: Renewable electricity blends found in the electricity grids where we operate. EAC: Overarching term including Renewable Energy Credits (RECs), International RECs (IRECs), and Guarantees of Origin (GOOs). 88,190 224,476 1,072,667 380,145 100 90 80 70 60 50 40 30 20 10 1,765,478 MWH 2018 2019 2020 2021 Electricity (MWh) in millions 3,544,562 3,285,014 3,161,965 3,467,200 Normalized Value (MWh per MM Revenue) 497 457 447 407 4 3 2 1 600 500 400 300 200 100 (MW h ) IN MILLIONS MW h PER MM REVENUE