26.7 Analyzing The Science

MEASURED VERSUS EXPECTED EUIS IN LEED-CERTIFIED BUILDINGS

One common measurement of how well a building performs with regard to energy usage is its Energy Use Intensity (EUI). EUI is expressed as energy used (in gigajoules) relative to a building’s size so that structures of different sizes can be compared. This graph plots data for 36 LEED-certified office buildings, comparing their actual performances to expected performances based on their designs. (Each data point represents a different building’s EUI.) the line shown is not a trend line for the actual data; it is a line that bisects the graph at a 45° angle, allowing us to see how closely the expected values match the observed values.

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