Overall Rating Silver - expired
Overall Score 53.93
Liaison Joanne Wong
Submission Date June 20, 2016
Executive Letter Download

STARS v2.0

Mills College
OP-8: Building Energy Consumption

Status Score Responsible Party
Complete 1.95 / 6.00 Nicole Gaetjens
Sustainability Coordinator
Campus Facilities
"---" 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 54,162.40 MMBtu 73,612 MMBtu

Purchased electricity and steam:
Performance Year Baseline Year
Grid-purchased electricity 16,232.40 MMBtu 19,094.90 MMBtu
District steam/hot water 37,930 MMBtu 54,517 MMBtu

Gross floor area of building space::
Performance Year Baseline Year
Gross floor area 955,269 Gross square feet 955,269 Gross square feet

Floor area of energy intensive space, performance year::
Floor Area
Laboratory space 8,000 Square feet
Healthcare space 1,165 Square feet
Other energy intensive space

Degree days, performance year (base 65 °F)::
Degree days (see help icon above)
Heating degree days 1,995
Cooling degree days 261

Source-site ratios::
Source-Site Ratio (see help icon above)
Grid-purchased electricity 3.14
District steam/hot water 1.20

Start and end dates of the performance year and baseline year (or 3-year periods)::
Start Date End Date
Performance Year July 1, 2014 June 30, 2015
Baseline Year July 1, 2008 June 30, 2009

A brief description of when and why the building energy consumption baseline was adopted:

Baseline is FY2009.


A brief description of any building temperature standards employed by the institution:

Mills employs a direct digital control program.


A brief description of any light emitting diode (LED) lighting employed by the institution:
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A brief description of any occupancy and/or vacancy sensors employed by the institution:

Mills employs motion sensors in LEED buildings and other retrofitted buildings to reduce energy usage. A recent lighting retrofit greatly expanded the use of motion sensors on campus.


A brief description of any passive solar heating employed by the institution:

The newly constructed LEED buildings, the Lorri I. Lokey Graduate School of Business and the Betty Irene Moore Natural Sciences Building, employ passive daylight techniques by utilizing large areas of glazing that filter UV and heat gain.


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

Digital Direct Controller is connected to key heating systems, air handlers, pumps, solar panels and some water systems.


A brief description of the institution's program to replace energy-consuming appliances, equipment and systems with high efficiency alternatives:

In all replacements of equipment and systems, efficiency is a priority consideration and replacement appliances are always energy star designated.


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:

The vending machines are equipped with an electronic sensor that plugs into the electrical outlet and the machine itself plugs into the sensor. The machines power down after approx. 15 minutes of inactivity then powers back up when motion is detected.


A brief description of other energy conservation and efficiency initiatives employed by the institution:
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The website URL where information about the institution’s energy conservation and efficiency initiatives is available:
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Data source(s) and notes about 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 or simply email your inquiry to stars@aashe.org.