Arc measures and scores the operational performance of spaces and buildings around the world. Arc scores power LEED v4.1 O+M certification, LEED Recertification, and LEED Zero.
This article updates information provided in April 2020. Since that time, overall Arc engagement has increased steadily:
April 2020 |
October 2020 |
|
Activated projects - interior spaces and buildings |
3.3 billion sq feet 306 million sq meters |
3.9 billion sq feet 362 million sq meters |
Greenhouse gas emissions |
98.6 million metrics tonnes |
115.9 million metrics tonnes |
Many of these projects have earned LEED certification, and this creates the opportunity to analyze the relationship between LEED certification level and key performance metrics. The table below provides data through the end of October 2020 for approximately 5,000 LEED-certified projects in the Arc database. The number of projects with complete data for each metric and each certification level varies.
Overall, the data show significant and sometimes dramatic improvements in performance between LEED Certified and LEED Platinum projects. Highlights include:
April 2020 |
November 2020 |
|
Reduction in GHG emissions per occupant |
-57% reduction (vs. LEED certified) |
-58% reduction (vs. LEED certified) |
Improvement in occupant satisfaction |
+11.0% (vs. LEED certified) |
10.5% (vs. LEED certified) |
These metrics reflect the greater stringency of LEED requirements as projects progress from the Certified to Platinum level. At this time, it is not possible to compare these absolute values or trends to non-LEED spaces or buildings. Consequently, LEED Certified is used as a baseline for comparison, even though this already reflects requirements beyond most local codes and standards.
These metrics also illustrate the type of information Arc can provide for any project or portfolio.
Explore ArcSkoru.com to learn more. Reach out to us with questions at contact@arcskoru.com
Table 1. Comparison of five key performance indicators for LEED Certified, Silver, Gold, and Platinum projects.
Category |
Metric |
Certified |
Silver |
Gold |
Platinum |
Energy Use |
kBtu per sf per year |
54.2 |
58.1 |
52.9 |
41.7 |
GHG Emissions |
mTCO2e per occ per year |
3.1 |
2.5 |
1.9 |
1.3 |
GHG Emissions |
mTCO2e per sf per year |
0.0066 |
0.0067 |
0.0051 |
0.0041 |
Transportation |
mTCO2e per commute |
4.8 |
2.8 |
2.9 |
2.0 |
Human Experience |
Occupant satisfaction (median) |
7.2 |
7.7 |
7.6 |
8.0 |
Table 2. Changes in performance compared to LEED Certified. All Certified-to-Certified comparisons have no change, and they are listed as not applicable (n/a).
Category |
Metric |
Certified |
Silver |
Gold |
Platinum |
Energy Use |
kBtu per sf per year |
n/a |
7% |
-3% |
-23% |
GHG Emissions |
mTCO2e per occ per year |
n/a |
-22% |
-39% |
-58% |
GHG Emissions |
mTCO2e per sf per year |
n/a |
2% |
-23% |
-38% |
Transportation |
mTCO2e per commute |
n/a |
-42% |
-40% |
-59% |
Human Experience |
Occupant satisfaction (median) |
n/a |
6.4% |
5.2% |
10.5% |