Overall Rating Gold - expired
Overall Score 66.35
Liaison Trevor Ledbetter
Submission Date May 2, 2017
Executive Letter Download

STARS v2.1

University of Arizona
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 3.63 / 6.00 Benjamin Champion
Office of Sustainability
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 546,348 MMBtu 580,214.80 MMBtu
Electricity from on-site renewables 3,914 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) 2,439,693 MMBtu 2,952,974 MMBtu
Total 2,989,955 MMBtu 3,533,188.80 MMBtu

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, 2005 June 30, 2006

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 for previous iterations of STARS assessments and other reporting of Greenhouse Gas Inventories. We are continuing to use the same baseline as used in the past.

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 14,721,402 Gross Square Feet 10,154,673 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 0.20 MMBtu / GSF 0.35 MMBtu / GSF
Source energy 0.28 MMBtu / GSF 0.47 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 907 Degree-Days (°F)
Cooling degree days 2,967 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 1,262,028 Square Feet
Healthcare space 807,972 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
18,861,402 Gross Square Feet

Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
40.92 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):

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

Winter thermostat settings 68-72
Summer thermostat settings 74-76

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

165 Street lights on campus are now LEDs

22 retrofitted Historic District Steinfield Post Lamps are retrofitted with LEDs.

Several buildings (at least 5) have LED exterior lighting.

Interior LED lighting is installed on the 7th floor of the Administration Building and in Berger Auditorium (McClelland Hall). Others are in process.

The basketball Arena at McKale Center uses LED lights.

3 Facilities Management parking lots and the Recycle Yard use LED area lights.

Dining Services utilizes LED technology in some walk-in freezers and refrigerators, and for accent lighting in the student unions.

UA also encourages the suppliers of its vending machines to utilize LED lighting.

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

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

The University of Arizona utilizes two natural gas-fired steam turbines for co-generation of power on campus. Both turbines are located on campus which significantly cuts down transmission loss.

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):

Old Main, the original building on campus (1891), was extensively remodeled and all utility systems retrofitted so that the building is now LEED Silver rated.

The HVAC systems in 9 buildings have been upgraded over the past three years to replace older, less efficient equipment, address control issues, better match equipment with current building needs, and increase reliability.

New transformers were installed at 25 campus buildings, as part of the 4kV to 13.8kV conversion project. Many of the old transformers were nearing end-of life, and were operating with higher losses than the new transformers.

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

All fields have been updated to FY15 data as of February 2016

For District Steam and Hot Water Purchased, the figures reported are zero due to the use of the two cogeneration plants at the University of Arizona to provide district steam for campus. The energy associated with the cogeneration plants are covered in the total energy consumption figure.

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.