Overall Rating Gold
Overall Score 67.00
Liaison Alistair Hall
Submission Date March 15, 2018
Executive Letter Download

STARS v2.1

Vassar College
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 2.75 / 6.00 Alistair Hall
Sustainability Assistant
Dean of Strategic Planning
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 84457 MMBtu 78404.70 MMBtu
Electricity from on-site renewables 27 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) 212841 MMBtu 238589.60 MMBtu
Total 297325 MMBtu 316994.30 MMBtu

Start and end dates of the performance year and baseline year (or 3-year periods):
Start Date End Date
Performance Year July 1, 2016 June 30, 2017
Baseline Year July 1, 2004 June 30, 2005

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):

It is also when the baseline year for the Greenhouse Gas Emissions was adopted.


Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 2480000 Gross Square Feet 2400000 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 0.12 MMBtu / GSF 0.13 MMBtu / GSF
Source energy 0.19 MMBtu / GSF 0.20 MMBtu / GSF

Percentage reduction in total building energy consumption (source energy) per unit of floor area from baseline:
4.57

Degree days, performance year (base 65 °F / 18 °C):
Degree days (see help icon above)
Heating degree days 5712 Degree-Days (°F)
Cooling degree days 996 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 77309 Square Feet
Healthcare space 1523 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
2647814 Gross Square Feet

Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
16.74 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):

Vassar’s Energy policy specifies temperature set-points during a 24 hour period based on expected occupancy and use of all buildings. Temperatures are also adjusted based on measurements of outdoor temperature, and are computer controlled for each building.


A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:
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A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:
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A brief description of co-generation employed by the institution, e.g. combined heat and power (CHP):

1 megaW of cogeneration capacity on natural gas boiler


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):
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The website URL where information about the programs or initiatives is available:
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.