First, across each of these varied measurements, LEED building performance averaged 25 – 30% better than the benchmark. The actual building performance was viewed through several whole-building metrics: energy use intensity (EUI) relative to national averages, Energy Star ratings, and energy use levels relative to the initial energy modeling (covered in more detail in Frankel, 2008). Green Buildings Council‘s (USGBC) LEED submittal files. Input to the study consisted of energy bills and brief descriptions of actual building use from owners, plus modeled energy usage information from the U.S. Is the Leadership in Energy and Environmental Design program (LEED) delivering actual energy savings? This study addresses that question with a post-occupancy assessment of 121 LEED buildings across the United State.
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