Overall Rating Gold
Overall Score 72.89
Liaison Tom Twist
Submission Date Nov. 8, 2023

STARS v2.2

Bates College
OP-5: Building Energy Efficiency

Status Score Responsible Party
Complete 4.49 / 6.00 Tom Twist
Sustainability Manager
Facilities
"---" 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 13,688,907 Kilowatt-hours 46,706.55 MMBtu
Electricity from on-site, non-combustion facilities/devices (e.g., renewable energy systems) 7,753 Kilowatt-hours 26.45 MMBtu

Stationary fuels and thermal energy, performance year (report MMBtu):
MMBtu
Stationary fuels used on-site to generate electricity and/or thermal energy 110,612 MMBtu
Imported steam, hot water, and/or chilled water 0 MMBtu

Total site energy consumption, performance year:
157,345.00 MMBtu

Performance year building space

Gross floor area of building space, performance year:
1,840,000 Gross square feet

Floor area of energy intensive space, performance year:
Floor area
Laboratory space 183,609 Square feet
Healthcare space 11,000 Square feet
Other energy intensive space 445,770 Square feet

EUI-adjusted floor area, performance year:
2,674,988 Gross square feet

Performance year heating and cooling degree days 

Degree days, performance year:
Degree days
Heating degree days 7,349 Degree-Days (°F)
Cooling degree days 388 Degree-Days (°F)

Total degree days, performance year:
7,737 Degree-Days (°F)

Performance period

Start and end dates of the performance year (or 3-year period):
Start date End date
Performance period July 1, 2021 July 1, 2022

Metric used in scoring for Part 1

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

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 13,551,443 Kilowatt-hours 46,237.52 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 123,509 MMBtu
Imported steam, hot water, and/or chilled water 0 MMBtu

Total site energy consumption, baseline year:
169,746.52 MMBtu

Baseline year building space

Gross floor area of building space, baseline year:
1,424,808 Gross square feet

Baseline period

Start and end dates of the baseline year (or 3-year period):
Start date End date
Baseline period July 1, 2000 July 1, 2001

A brief description of when and why the energy consumption baseline was adopted:
In 2001, there were a group of interested and progressive faculty members that wanted to start benchmarking our data. And it has been maintained since then by our energy manager.

Source energy

Source-site ratio for imported electricity:
3.14

Total energy consumption per unit of floor area:
Site energy Source energy
Performance year 0.09 MMBtu per square foot 0.14 MMBtu per square foot
Baseline year 0.12 MMBtu per square foot 0.19 MMBtu per square foot

Metric used in scoring for Part 2

Percentage reduction in total source energy consumption per unit of floor area from baseline:
25.85

Optional Fields 

Documentation to support the performance year energy consumption figures reported above:
A brief description of the institution's initiatives to shift individual attitudes and practices in regard to energy efficiency:
Our sustainability work study students conduct workshops for the dorm RAs to then educate their students within a dorm on practices such as energy efficiency and how to report over or underheated spaces, reduction in hot water use, and so on.

A brief description of energy use standards and controls employed by the institution:
We have just installed Honeywell building sensors and controls in all of our major buildings, so that we may now employ automatic shutdown, and temp control at night or vacations. It also lets us see data on energy use from each building - something which is relatively new to us.

A brief description of Light Emitting Diode (LED) lighting and other energy-efficient lighting strategies employed by the institution:
We are swapping out with T8s and LEDs as existing bulbs fail. Our two newest buildings have 100% LED lighting. This upcoming year, we will engage in a campus-wide LED retrofit.

A brief description of passive solar heating, geothermal systems, and related strategies employed by the institution:
We have been focusing on daylighting in our newest buildings, and heat reclamation upgrades to our ventillation in our rennovations.

A brief description of co-generation employed by the institution:
We do not have CHP on campus.

A brief description of the institution's initiatives to replace energy-consuming appliances, equipment, and systems with high efficiency alternatives:
We are in the midst of an audit of our science lab hood ventilation, hoping to replace and upgrade with more efficient units.

Website URL where information about the institution’s energy conservation and efficiency program is available:
Additional documentation to support the submission:
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.