For this statistic, the values in the source document have been recalculated and rounded.
Engie defines energy efficiency as follows: "Using less energy for a given use is energy efficiency. The evolution of technologies allows us to be more efficient without changing our usage. For example, if heating is needed, it will be more efficient if the house is better insulated."
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Energy efficiency of buildings: global investments by category 2015
This chart shows the distribution of global investments in energy efficiency in the building sector in 2015, by product category. It reveals that nearly half of these investments were dedicated to improving the building envelope.
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IEA. (October 10, 2016). Distribution of global investments in energy efficiency in the building sector in 2015, by product category [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1638503/energy-efficiency-investments-building-by-product-category-world/
IEA. "Distribution of global investments in energy efficiency in the building sector in 2015, by product category." Chart. October 10, 2016. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1638503/energy-efficiency-investments-building-by-product-category-world/
IEA. (2016). Distribution of global investments in energy efficiency in the building sector in 2015, by product category. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1638503/energy-efficiency-investments-building-by-product-category-world/
IEA. "Distribution of Global Investments in Energy Efficiency in The Building Sector in 2015, by Product Category." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 10 Oct 2016, /statistics/1638503/energy-efficiency-investments-building-by-product-category-world/
IEA, Distribution of global investments in energy efficiency in the building sector in 2015, by product category ÌÇÐÄÆƽâ°æ, /statistics/1638503/energy-efficiency-investments-building-by-product-category-world/ (last visited July 31, 2026)
Distribution of global investments in energy efficiency in the building sector in 2015, by product category [Graph], IEA, October 10, 2016. [Online]. Available: /statistics/1638503/energy-efficiency-investments-building-by-product-category-world/
