Overall Rating Gold - expired
Overall Score 84.41
Liaison Patrick McKee
Submission Date March 26, 2018
Executive Letter Download

STARS v2.1

University of Connecticut
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 3.56 / 6.00 Richard Miller
Ofice of Environmental Policy
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 35,123 MMBtu 85,014 MMBtu
Electricity from on-site renewables 66.20 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) 1,792,084 MMBtu 2,009,042 MMBtu
Total 1,827,273.20 MMBtu 2,094,056 MMBtu

Start and end dates of the performance year and baseline year (or 3-year periods):
Start Date End Date
Performance Year Jan. 1, 2017 Dec. 31, 2017
Baseline Year Jan. 1, 2007 Dec. 31, 2007

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):

This baseline was adopted because it is the earliest year for which accurate data is available.

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 10,873,545.17 Gross Square Feet 10,047,776 Gross Square Feet

Source-site ratio for grid-purchased electricity:

Total building energy consumption per unit of floor area:
Performance Year Baseline Year
Site energy 0.17 MMBtu / GSF 0.21 MMBtu / GSF
Source energy 0.17 MMBtu / GSF 0.23 MMBtu / GSF

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

Degree days, performance year (base 65 °F / 18 °C):
Degree days (see help icon above)
Heating degree days 5,602.50 Degree-Days (°F)
Cooling degree days 1,005.20 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 538,458.49 Square Feet
Healthcare space 8,979.93 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
12,434,208.08 Gross Square Feet

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

Documentation (e.g. spreadsheet or utility records) 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 (e.g. outreach and education efforts):

Every fall semester, the Office of Environmental Policy (OEP) encourages students to conserve energy and water by organizing a competition among dorms called EcoMadness. Each floor is assigned an EcoCaptain, a student volunteer, who puts on a variety of different programming designed to educate students on energy and water conservation. The OEP also sends each dorm weekly snapshots of their energy and water consumption. Carbon offsets are purchased in the name of the winning dorm.


The OEP also administers UConn's Green Office Certification Program, which promotes more sustainable behaviors and practices among faculty and staff in the UConn workplace.


A brief description of energy use standards and controls employed by the institution (e.g. building temperature standards, occupancy and vacancy sensors):

Minimum Temperature Setpoints for VAV Terminals:
All VAV terminal boxes capable of both heating and cooling shall be programmed with a minimum of 5
temperature setpoints as follows:
Unoccupied Cooling Setpoint (Default 82 °F)
Occupied Cooling Setpoint (1.5° above Default 73.5 °F)
Base Room Setpoint (Default 72 °F)
Occupied Heating Setpoint (1.5° below Room Setpoint: Default 70.5 °F)
Unoccupied Heating Setpoint (Default 60 °F)
Much more information on start-up, shut-down, etc. in Building Automation System Standards (pg. 16-23, Section 5.1: VAV with/without Reheat and/or Radiation)


Lighting system upgrades to LEDs also include the installation of controls like motion and occupancy sensors, which turn off the light when they stop detecting movement; and daylight sensors, which maximize use of sunlight by turning on the lights only when natural light is insufficient for people to see inside the area. The combination of these efficient lighting systems and sensors could reduce the lighting electricity demand by up to 59% in some buildings
115 buildings have been re-lamped and 23 of the most energy intensive buildings have been retro-commissioned since 2010. These projects include adding motion and occupancy sensors for controlling either lighting or HVAC.

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

UConn is committed to full LED retrofit, campus-wide (interior and exterior lighting) by 2020. There were 149 re-lamping projects between 2010 and 2016 to reduce C02 emissions by 6,984 metric tons. Re-lamping is currently underway on additional buildings and will yield another 6,722 metric ton reduction in CO2 emissions once completed by 2020. Re-lamping of outdoor lighting for student and employee parking lots will be completed by 2020 and will reduce CO2 emissions by 1,865 metric tons.

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

Design Guidelines and Performance Standards (pg. 25, Section 4.3: Energy Conservation):


“Reduce Conditioning Loads:

To reduce a buildings dependence on mechanical heating and cooling, the Designer should design exterior wall assemblies to be a minimum of R-19 and roof assemblies to a minimum of R-30. All glazing should incorporate double-glazed insulated glass units with a low-E coating, argon-filled with a U-factor of ≤ 0.27. Seasonal shading (e.g., deciduous trees, porches, horizontal sun shades and roof overhangs) should be provided to south facing glazing. Thermal mass should be incorporated within a building, since high mass buildings can stabilize temperature swings by storing heat during the day and releasing it during the evening, thus reducing the building’s peak cooling loads.”

A brief description of co-generation employed by the institution, e.g. combined heat and power (CHP):

UConn’s 25 MW natural gas-fired cogeneration facility is classified as a Class III Renewable Energy source by the State of Connecticut and it generates Renewable Energy Credits (RECs), based on its high efficiency factor as a microgrid source of combined heat, cooling and power for nearly 90% of the main campus. In turn, UConn uses proceeds from these REC sales to finance sustainable energy and energy efficiency projects, like retro-commissioning, re-lamping and more.

The cogen facility produces 100% of the core campus's electricity needs, while the remainder of electricity for more remote portions of the main campus is purchased from ConEd with a renewables contract specifying that a minimum of 100% of the amount purchased be produced from renewable sources.

The University’s Cogeneration facility uses natural gas, with ultra-low sulfur fuel oil (ULSF) as a back-up fuel source, to fire three Solar Taurus 70 combustion turbine generators to produce electricity. Waste heat from the turbines is used to produce high pressure steam, which is then used in a steam turbine generator to produce additional electricity. The steam turbine exhaust or reduced steam is supplied to internal plant use, to provide Chilled Water via the three York absorption chillers or to the campus distribution network. The network reduces the steam to low pressure 65 psig for building heating and kitchen service.

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):

UConn has had a longstanding policy, in accordance with state law, that requires the purchase of only Energy Star-rated appliances and EPEAT computers. Thus, as older appliances, equipment, PCs, laptops and other devices are retired, they have been, and will continue to be, replaced by more efficient state-of-the-art models. It is estimated that approximately 10-20% of appliances, copiers, PCs and other electronic equipment are replaced each year.

UConn has also completed retro-commissioning (RCx) at 23 of the most energy intensive buildings on campus since 2010, resulting in reducing 12,987 TPY of eCO2. Additionally, 7 science buildings on campus will undergo improvements by 2020 to reduce CO2 emissions by another 5,923 metric tons. Finally, the University is underway replacing old, leaky steam and condensate return pipes and as of 2017 have thus reduced CO2 emissions by 4,652 metric tons.

The website URL where information about the programs or initiatives is available:
Additional documentation to support the submission:

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.