2021 Owens Corning Sustainability Report | Reducing Our Environmental Footprint | Energy Efficiency | 142 2021 Energy Conservation Projects Description of Activity NUMBER OF PROJECTS MT CO 2 e SAVINGS/ YEAR MWh SAVINGS/ YEAR ANNUAL SAVINGS (USD) INVESTMENT REQUIRED (USD) PAYBACK LIFETIME Waste heat recovery projects 4 4,721 26,065 $789,898 $1,78 8 ,174 1-3 years 16-20 years Efficient lighting projects 8 481 1,750 $16 3,55 7 $456,4 41 1-3 years 6 -10 years Compressed air efficiency projects 2 852 1,383 $135,098 $25,837 <1 year 16-20 years Energy efficiency projects of various types, including pump upgrades, motor upgrades, and other infrastructure 3 120 952 $ 5 7, 5 4 8 $94,090 1-3 years Varies by Project Projects impacting our processes, resulting in improved energy efficiency, including right-sizing of systems, efficient coating systems, and other process optimizations 5 585 1,362 $86,075 $123,080 1-3 years Varies by Project HVAC efficiency projects 3 1,12 9 1,558 $124,795 $ 319,18 5 1-3 years Varies by Project Replacing equipment with more energy-efficient technologies 4 439 1,123 $72,377 $136,365 1-3 years 16-20 years TOTA L 29 8,328 3 4,193 $1,429,348 $ 2 ,94 3,173 ENERGY PERFORMANCE In 2021, approximately 57% of the electricity used in our U.S. facilities came from renewable sources: wind (53.5%), hydro (1.9%), solar (1.2%), and biomass (0.7%) This percentage includes renewable energy sourced from the grid as well as energy enabled by our PPAs. In fact, of our total U.S. electricity consumption, 50% is directly attributable to our renewable energy programs. Globally, approximately 51% of our electricity across our portfolio globally came from renewable sources, such as wind, hydro, solar, and geothermal. This metric is defined as the renewable energy sourced from the grid and the energy enabled by our PPAs, including on-site generation. Energy Conservation and Savings Since 2006, Owens Corning has implemented over 1,250 energy-use efficiency and reduction projects in our facilities around the world. The result has been a reduction in estimated usage by more than 1.45 million MWh per year. These projects include lighting retrofits, compressed air optimization, cooling tower upgrades, pump optimizations, solar hot water tanks, fuel switching, process optimizations, and biomass conversions. In 2021, we implemented 29 projects, generating annual energy savings of over 34,000 MWh and reducing greenhouse gas emissions by over 8,000 MT per year. Photo submitted by: Danyelle Lynne Phelps | Granville, Ohio, U.S. Solar field at the plant in Fairburn, Georgia, U.S.