Overall Rating Silver
Overall Score 46.37
Liaison Nina Bisbee
Submission Date June 29, 2017
Executive Letter Download

STARS v2.1

Bryn Mawr College
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 2.65 / 6.00
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 54237 MMBtu 56017 MMBtu
Electricity from on-site renewables 0 MMBtu 0 MMBtu
District steam/hot water (sourced from offsite) 0 MMBtu 0 MMBtu
Energy from all other sources (e.g., natural gas, fuel oil, propane/LPG, district chilled water, coal/coke, biomass) 64668 MMBtu 69304 MMBtu
Total 118905 MMBtu 125321 MMBtu

Start and end dates of the performance year and baseline year (or 3-year periods):
Start Date End Date
Performance Year June 1, 2015 May 31, 2016
Baseline Year June 1, 2007 May 31, 2008

A brief description of when and why the building energy consumption baseline was adopted (e.g. in sustainability plans and policies or in the context of other reporting obligations):
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Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 1289765 Gross Square Feet 1340225 Gross Square Feet

Source-site ratio for grid-purchased electricity:
3.14

Total building energy consumption per unit of floor area:
Performance Year Baseline Year
Site energy 0.09 MMBtu / GSF 0.09 MMBtu / GSF
Source energy 0.18 MMBtu / GSF 0.18 MMBtu / GSF

Percentage reduction in total building energy consumption (source energy) per unit of floor area from baseline:
0.42

Degree days, performance year (base 65 °F / 18 °C):
Degree days (see help icon above)
Heating degree days 3657 Degree-Days (°F)
Cooling degree days 1550 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 175000 Square Feet
Healthcare space 0 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
1650965 Gross Square Feet

Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
13.83 Btu / GSF / Degree-Day (°F)

Documentation (e.g. spreadsheet or utility records) to support the performance year energy consumption figures reported above:
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A brief description of the institution's initiatives to shift individual attitudes and practices in regard to energy efficiency (e.g. outreach and education efforts):
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A brief description of energy use standards and controls employed by the institution (e.g. building temperature standards, occupancy and vacancy sensors):

All building thermostats are set for a range of 68-70 degrees in the heating season and 73-75 degrees during the cooling season. Temperature ranges are set back further on a daily basis during low occupancy hours and during academic year breaks.


A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:

All new lighting fixtures are installed with LED technology. With advances in energy technology new lighting LED lamps are now available of existing fixtures with or without minor retrofits. Where technology is available all re-lamping employs LED lamps.

In 2013 Brecon Hall became the first 100 percent LED residence hall at Bryn Mawr. Along with Brecon Hall, LED bulbs are also used in the common rooms or hallways of Denbigh, Radnor, and Pembroke East and West. Apart from these residence halls, LED bulbs are used in the Campus Center, Health Center, second floor of Taylor Hall, and Wyndham. In the Gateway building, 98 percent of all the bulbs are LED bulbs. More recently our New Dormitory that opened in the Fall of 2015 has 100% LED lighting.


A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:

In 2012, Bryn Mawr College installed its first solar panels on the southern slopes of Cambrian Row. Of the two solar panels, the large 12-panel set has a maximum power of 2820 watts and a smaller two-panel set has the potential power of 570 watts. The solar energy is currently being used to light the safety lights of the SGA house on Cambrian Row. We also have a demonstration wind mill on site.


A brief description of co-generation employed by the institution, e.g. combined heat and power (CHP):
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A brief description of the institution's initiatives to replace energy-consuming appliances, equipment and systems with high efficiency alternatives (e.g. building re-commissioning or retrofit programs):

Bryn Mawr College has an ongoing program to replace or refurbish older HVAC equipment to improve efficiency. One example is a project that refurbished air handlers in the Chemistry Department building (Park) by replacing the heating coils and installing VFDS on the motors. The coils installed are approximately 12 feet tall and 18 feet long. By replacing the coils, the College was able to reduce natural gas consumption for this machinery by 20 percent and the campus carbon footprint by 5 percent. More recently we have replaced boilers in Erdman Hall, and our Development Department Office building to further reduce energy use.


The website URL where information about the programs or initiatives is available:
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Additional documentation to support the submission:
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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.