Overall Rating Expired
Overall Score Expired
Liaison Tavey Capps
Submission Date Feb. 25, 2015
Executive Letter Download

STARS v2.0

Duke University
OP-8: Building Energy Consumption

Status Score Responsible Party
Complete Expired Tavey Capps
Environmental Sustainability Director
Office of the Executive Vice President
"---" indicates that no data was submitted for this field

Total building energy consumption, all sources (transportation fuels excluded):
Performance Year Baseline Year
Total building energy consumption 3180336 MMBtu 3072945 MMBtu

Purchased electricity and steam:
Performance Year Baseline Year
Grid-purchased electricity 1541095 MMBtu 1595142 MMBtu
District steam/hot water 1639241 MMBtu 1477803 MMBtu

Gross floor area of building space::
Performance Year Baseline Year
Gross floor area 18502474 Gross Square Feet 15189461 Gross Square Feet

Floor area of energy intensive space, performance year::
Floor Area
Laboratory space 1322274 Square Feet
Healthcare space 3560665 Square Feet
Other energy intensive space

Degree days, performance year (base 65 °F)::
Degree days (see help icon above)
Heating degree days 3707
Cooling degree days 1477

Source-site ratios::
Source-Site Ratio (see help icon above)
Grid-purchased electricity 3.14
District steam/hot water 1.43

Start and end dates of the performance year and baseline year (or 3-year periods)::
Start Date End Date
Performance Year July 1, 2013 June 30, 2014
Baseline Year July 1, 2006 June 30, 2007

A brief description of when and why the building energy consumption baseline was adopted:
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A brief description of any building temperature standards employed by the institution:

Building control systems are used to regulate temperatures based on occupancy hours are used in 50% of buildings on campus. Where possible, temperatures in university buildings that are on the central control system will be set at approximately 70 degrees in the winter and 76 degrees in the summer. Those temperatures will be used during regular business hours of 7 a.m. to 7 p.m. Monday to Friday. Off-hour temperatures are based on building occupancy typically of 7 p.m. to 7 a.m. and weekends will be set as low as 60 degrees and up to 80 degrees. Actual room temperatures can be within two degrees (plus or minus) of the new set points.


A brief description of any light emitting diode (LED) lighting employed by the institution:

Duke is prioritizing the use of LED lights throughout campus. LED lights are currently utilized in three campus parking garages that have been retrofit. Any new garage will have LEDs as a standard. New construction projects at Duke now also typically include LED troffer fixtures. Furthermore, Duke has retrofit 1500 exterior lighting fixtures on campus to LED.

As of Oct. 2014, Duke had the first NCAA Division I outdoor college sports venue to be lit with LED lighting. A set of 56 LED lamps replaced 96 1000-watt metal halide fixtures currently installed and yield a projected energy savings of more than 60 percent while significantly increasing on-field illumination.

Duke has over 4500 LED lamps on campus.


A brief description of any occupancy and/or vacancy sensors employed by the institution:

Both occupancy and vacancy sensors are used on campus. Occupancy sensors sense motion in a space and automatically turn lights on and off while vacancy sensors require an occupant to turn lights on and auto turns lights off.


A brief description of any passive solar heating employed by the institution:
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A brief description of any ground-source heat pumps employed by the institution:
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A brief description of any cogeneration technologies employed by the institution:
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A brief description of any building recommissioning or retrofit program employed by the institution:

Duke has performed a detailed assessments of three buildings totaling approximately 670,000 GSF. Out of those assessments, we have completed the majority of commissioning activities in one of those buildings, and will proceed with the next phase in Q2 of 2015. We are currently in the planning stages of a 3-5 year existing building commissioning program, which will develop a comprehensive method of identifying and funding corrective actions as they relate to space programming, building envelope, mechanical/electrical/plumbing systems, and indoor environmental quality.


A brief description of any energy metering and management systems employed by the institution:

A Siemens Apogee System is used to control and monitor a majority of the buildings on campus. The system monitors the HVAC and other critical systems in a building and can be accessed anywhere around campus. Alarms are sent out to individuals to alert them of building issues.

Additionally, a new utility management database software was recently installed. The new database software tracks utility use in all buildings on campus. Duke also uses the Schneider Electric Struxure Ware platform for electrical metering and monitoring. In conjunction with this software platform, we are upgrading building metering technology to provide 15 min interval data.


A brief description of the institution's program to replace energy-consuming appliances, equipment and systems with high efficiency alternatives:
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A brief description of any energy-efficient landscape design initiatives employed by the institution:
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A brief description of any vending machine sensors, lightless machines, or LED-lit machines employed by the institution:
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A brief description of other energy conservation and efficiency initiatives employed by the institution:

Environment Hall,

Duke Environment Hall, the 70,000-square-foot new home of Duke University’s Nicholas School of the Environment, opened on April 10, 2014.

The five-story glass-and-concrete building, located on Circuit Drive on Duke’s West Campus, incorporates start-of-the-art green features and technologies inside and out. It has been designed to meet or exceed the criteria for LEED Green Building platinum certification, the highest level of sustainability.

The hall houses five classrooms, a 105-seat auditorium, 45 private offices, 72 open office spaces, a 32-seat computer lab, an outdoor courtyard and an environmental art gallery, as well as conference rooms, shared workrooms and common.

Green features range from rooftop solar panels and innovative climate control and water systems, to special windows that moderate light and heat, to an organic orchard and sustainably designed landscaping.


The website URL where information about the institution’s energy conservation and efficiency initiatives is available:

Using total GSF - Baseline was 2007

The information presented here is self-reported. While AASHE staff review portions of all STARS reports and institutions are welcome to seek additional forms of review, the data in STARS reports are not verified by AASHE. If you believe any of this information is erroneous or inconsistent with credit criteria, please review the process for inquiring about the information reported by an institution and complete the Data Inquiry Form.