Overall Rating	Gold
Overall Score	71.19
Liaison	Margaret Bounds
Submission Date	March 1, 2024

STARS v2.2

Connecticut College
OP-5: Building Energy Efficiency

Status	Score	Responsible Party
	2.78 / 6.00	Margaret Bounds Director of Sustainability Office of Sustainability

"---" indicates that no data was submitted for this field

Part 1. Site energy use per unit of floor area

Performance year energy consumption

Electricity use, performance year (report kilowatt-hours):

	kWh	MMBtu
Imported electricity	6,429,022 Kilowatt-hours	21,935.82 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)	0 Kilowatt-hours	0 MMBtu

Stationary fuels and thermal energy, performance year (report MMBtu):

	MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy	164,335.64 MMBtu
Imported steam, hot water, and/or chilled water	0 MMBtu

Total site energy consumption, performance year:

186,271.46 MMBtu

Performance year building space

Gross floor area of building space, performance year:

130,780.67 Gross square meters

Floor area of energy intensive space, performance year:

	Floor area
Laboratory space	2,800.84 Square meters
Healthcare space	0 Square meters
Other energy intensive space	395.02 Square meters

EUI-adjusted floor area, performance year:

136,777.37 Gross square meters

Performance year heating and cooling degree days

Degree days, performance year:

	Degree days
Heating degree days	2,418.89 Degree-Days (°C)
Cooling degree days	467.22 Degree-Days (°C)

Total degree days, performance year:

2,886.11 Degree-Days (°C)

Performance period

Start and end dates of the performance year (or 3-year period):

	Start date	End date
Performance period	July 1, 2022	June 30, 2023

Metric used in scoring for Part 1

Total site energy consumption per unit of EUI-adjusted floor area per degree day, performance year:

145.64 Btu / GSM / Degree-Day (°C)

Part 2. Reduction in source energy use per unit of floor area

Baseline year energy consumption

STARS 2.2 requires electricity data in kilowatt-hours (kWh). If a baseline has already been established in a previous version of STARS and the institution wishes to continue using it, the electricity data must be re-entered in kWh. To convert existing electricity figures from MMBtu to kWh, simply multiply by 293.07107 MMBtu/kWh.

Electricity use, baseline year (report kWh):

	kWh	MMBtu
Imported electricity	15,903,044 Kilowatt-hours	54,261.19 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems)	0 Kilowatt-hours	0 MMBtu

Stationary fuels and thermal energy, baseline year (report MMBtu):

	MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy	105,057.89 MMBtu
Imported steam, hot water, and/or chilled water	0 MMBtu

Total site energy consumption, baseline year:

159,319.08 MMBtu

Baseline year building space

Gross floor area of building space, baseline year:

134,616.45 Gross square meters

Baseline period

Start and end dates of the baseline year (or 3-year period):

	Start date	End date
Baseline period	July 1, 2016	June 30, 2017

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

We adopted 2017 as our baseline year for reporting to align with the adoption of our Campus Sustainability Plan. It is also the first year for which we have more comprehensive Scope 3 reporting, so that helps maintain consistency when reporting changes in different types of emissions. This is also the baseline year we are using for OP2.

Source energy

Source-site ratio for imported electricity:

Total energy consumption per unit of floor area:

	Site energy	Source energy
Performance year	1.42 MMBtu per square meter	1.76 MMBtu per square meter
Baseline year	1.18 MMBtu per square meter	1.99 MMBtu per square meter

Metric used in scoring for Part 2

Percentage reduction in total source energy consumption per unit of floor area from baseline:

11.55

Optional Fields

Documentation 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:

The Office of Sustainability has a student team called Energy Builders that has been holding energy use reduction competitions in the residence halls over the past year. They have also hung up posters giving information about energy use reduction and have created a trivia game for students to test their energy knowledge. For faculty and staff, we focus our efforts through a Green Office Certification Program which recommends and rewards specific energy saving habits.

A brief description of energy use standards and controls employed by the institution:

The College uses central controls to maintain a temperature of between 68 and 74 degrees during the heating season. Over winter break, the temperature is set-back to 58 degrees in unoccupied spaces.

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

The College has completed major lighting upgrades including in Shain Library, The Plex (6 connected residence halls), Cummings Art Center, 40 classrooms and all outdoor lighting in the period of 2022-2023. The Shain, Cummings and classroom upgrades also included occupancy sensors. Previous upgrades were completed in the Athletic Center, renovated spaces, and "hard to access" spaces like the pool and a performance hall.

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

The College has a geothermal system that provides heating and cooling to New London Hall, one of our science facilities.

A brief description of co-generation employed by the institution:

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

The College upgraded the kitchen hoods in all dining hall kitchens to variable speed fans.

Website URL where information about the institution’s energy conservation and efficiency program is available:

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Additional documentation to support the submission:

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Data source(s) and notes about the submission:

Data was provided by Facilities Management. Unit conversions were done in an internal tracking sheet using the calculations provided in the Campus Energy Consumption Converter. Degree days were pulled from the EPA Energy Star site: https://portfoliomanager.energystar.gov/pm/degreeDaysCalculator

Our gross square footage decreased because of the sale of several houses that were located on the periphery of our campus.

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.