Overall Rating Bronze
Overall Score 37.67
Liaison Trina Larson
Submission Date March 1, 2019
Executive Letter Download

STARS v2.1

Chandler-Gilbert Community College
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 5.27 / 6.00 Sara Haidle
Sustainability Project Assistant
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 25,430.77 MMBtu 39,803.71 MMBtu
Electricity from on-site renewables 7,181.54 MMBtu 61.37 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) 2,273.36 MMBtu 3,076 MMBtu
Total 34,885.67 MMBtu 42,941.08 MMBtu

Start and end dates of the performance year and baseline year (or 3-year periods):
Start Date End Date
Performance Year July 1, 2017 June 30, 2018
Baseline Year July 1, 2010 June 30, 2011

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):

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 667,239 Gross Square Feet 578,664 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 0.05 MMBtu / GSF 0.07 MMBtu / GSF
Source energy 0.13 MMBtu / GSF 0.22 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 1,372.90 Degree-Days (°F)
Cooling degree days 4,427 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 0 Square Feet
Healthcare space 0 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
705,927 Gross Square Feet

Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
8.52 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):

The facilities director visits engineering classes to teach awareness of facilities management decisions and the consequences of those decisions on energy use. For example, best practices for operating the chillers efficiently. The ETC, our campus garden and outdoor learning center, features a Ramada with a rooftop solar array as a demonstration piece to all visitors.

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

All government buildings in Arizona have adopted temperature set points, which controls the maximum temperature in the winter and the minimum temperature in the summer of all buildings on campus (with the exception of specialized buildings). All buildings on campus utilize occupancy sensors to control lighting and temperature.

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

LED retrofits started in 2013 with the replacement of T8 fluorescent fixtures in one building. This resulted in a 3752 W drop in demand. As of June 2018, 443,689 sq ft of indoor space (68%) has been converted to LED on our main and satellite campus. Almost all outdoor space has been converted to LED lighting as well. The LED retrofit of roadways and parking lots on our main campus resulted in a drop equivalent to the monthly energy use of 15 homes.

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):

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):

On top of our gradual shift from fluorescent and incandescent lighting to LED, our Energy Star Procurement Policy guides purchases of highly efficient appliances where financially feasible. Currently we are in the process of purchasing a new more efficient chiller that will result in a 60% drop in electricity demand (0.78 kw/ton to 0.3 kw/ton). Any major renovation is done under the guidance of LEED Silver standards. This includes replacing windows with energy efficient double pane, minimum R-30 and reflective coatings on new roofing.

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 and complete the Data Inquiry Form.