Overall Rating Gold - expired
Overall Score 77.55
Liaison Jack Byrne
Submission Date June 9, 2017
Executive Letter Download

STARS v2.0

Middlebury College
OP-8: Building Energy Consumption

Status Score Responsible Party
Complete 1.95 / 6.00 Jack Byrne
Director of Sustainability Integration
Environmental Affair
"---" 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 420,924 MMBtu 432,224 MMBtu

Purchased electricity and steam:
Performance Year Baseline Year
Grid-purchased electricity 69,064 MMBtu 74,891 MMBtu
District steam/hot water 0 MMBtu 0 MMBtu

Gross floor area of building space::
Performance Year Baseline Year
Gross floor area 2,377,753 Gross square feet 2,246,612 Gross square feet

Floor area of energy intensive space, performance year::
Floor Area
Laboratory space 220,000 Square feet
Healthcare space 8,500 Square feet
Other energy intensive space

Degree days, performance year (base 65 °F)::
Degree days (see help icon above)
Heating degree days 6,351
Cooling degree days 919

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, 2015 June 30, 2016
Baseline Year July 1, 2007 June 30, 2008

A brief description of when and why the building energy consumption baseline was adopted:
We adopted our carbon neutraliity by 2016 goal in May, 2007. We use FY 08 as a baseline year.

A brief description of any building temperature standards employed by the institution:
Over half of the buildings (sq. ft.) on campus use timers to regulate temperature based on occupancy hours. We maintain a 68 F setpoint in the winter and 75 F in the summer for buildings with air conditioning. We have a thermal comfort policy that requires avoiding central air conditioning in new buildings and use of siting, design, passive cooling measures first.

A brief description of any light emitting diode (LED) lighting employed by the institution:
In 2012 we installed about $350,000 worth of LED lighting around campus as the first phase of an ongoing project to convert incandescent and CFL lighting around the campus to LED lighting based on the results and performance of the pilot phase.

We had also previously replaced about 80 exterior wallpacks on exterior walls (primarily above doors) with LEDs. There are also several LED surface-mount lights that were put in during recent renovations of residential spaces.

A brief description of any occupancy and/or vacancy sensors employed by the institution:
Lighting sensors are used extensively in many of the newer buildings on campus and retrofits are done on a number of other older buildings. Several previous examples are described below. This year, as a result of a student led project an application for a loan from the Middlebury Green Revolving Loan Fund, the College installed motion sensors for lights in most of the laundry rooms on campus.

In fall 2009, the Mahaney Center for the Arts was awarded an Environmental Council grant to install occupancy sensors in practice rooms, restrooms, and corridors. The Athletics center, Axinn Center, The Franklin Environmental Center at Hillcrest, and several other buildings on campus also have occupancy sensors for lighting.

A brief description of any passive solar heating employed by the institution:
Our two solar decathlon houses, Self-Reliance and InSite, which are now student housing both incorporate passive solar design in their construction.

A brief description of any ground-source heat pumps employed by the institution:
The College uses several air source heat pumps and uses a ground source heat pump to air condition the Franklin Environmental Center.

A brief description of any cogeneration technologies employed by the institution:
Middlebury's central heating plant produces steam from biomass gasification and fuel oil when needed. We co-generate electricity as a bi-product of steam production to heat and cool the main campus. We expect the fuel oil component will be replaced in 2016 by renewable natural gas from a manure digester the College has contracted with to provide that fuel.

A brief description of any building recommissioning or retrofit program employed by the institution:

A brief description of any energy metering and management systems employed by the institution:
We use a Siemens energy management system to manage heat cooling (where available) and some interior and exterior lighting for all of the large buildings on campus.

A brief description of the institution's program to replace energy-consuming appliances, equipment and systems with high efficiency alternatives:
We have a practice of purchasing energy star appliances whenever they need to be replaced.

A brief description of any energy-efficient landscape design initiatives employed by the institution:

A brief description of any vending machine sensors, lightless machines, or LED-lit machines employed by the institution:
We use "vending misers" in all but our glass-fronted vending machines, which are not compatible with vending misers and are labeled as energy efficient. The vending misers have occupancy sensors which allow the machine's lighting to only turn on when the space is occupied.

A brief description of other energy conservation and efficiency initiatives employed by the institution:
Over the past ten years the College has installed $1.7 MM of energy efficiency projects which have resulted in 3.4 million kWh and $500,000 savings annually. When rebates to the College from the Vermont Energy Investment Corporation are factored in these projects have an average return on investment of 2.7 years.

The website URL where information about the institution’s energy conservation and efficiency initiatives is available:
Data source(s) and notes about the submission:

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