Overall Rating Platinum - expired
Overall Score 88.14
Liaison Tonie Miyamoto
Submission Date Dec. 6, 2019
Executive Letter Download

STARS v2.1

Colorado State University
OP-5: Building Energy Consumption

Status Score Responsible Party
Complete 3.60 / 6.00 Carol Dollard
Energy Engineer
Facilities Management
"---" indicates that no data was submitted for this field

Figures needed to determine total building energy consumption:
Performance Year Baseline Year
Grid-purchased electricity 580,202.60 MMBtu 513,047.90 MMBtu
Electricity from on-site renewables 1,298 MMBtu 311 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) 1,118,114 MMBtu 1,146,907.90 MMBtu
Total 1,699,614.60 MMBtu 1,660,266.80 MMBtu

Start and end dates of the performance year and baseline year (or 3-year periods):
Start Date End Date
Performance Year July 1, 2018 June 30, 2019
Baseline Year July 1, 2009 June 30, 2010

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):

FY10 as a baseline year is consistent with our Climate Action Plan baseline year when carbon neutrality goals were set.

Gross floor area of building space:
Performance Year Baseline Year
Gross floor area of building space 12,359,438 Gross Square Feet 9,840,790 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 0.14 MMBtu / GSF 0.17 MMBtu / GSF
Source energy 0.24 MMBtu / GSF 0.28 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 6,502 Degree-Days (°F)
Cooling degree days 613 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 2,268,422 Square Feet
Healthcare space 240,513 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
19,269,041 Gross Square Feet

Building energy consumption (site energy) per unit of EUI-adjusted floor area per degree day, performance year:
12.40 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):

Colorado State University takes numerous approaches. The Campus Energy Coordinator works directly with faculty and staff on the academic half of campus to adopt and employ no-cost and low-cost energy conservation behaviors in their offices, units, departments, and buildings. Outreach may channel through the Building Proctor or through a motivated individual conservation champion. Several “green teams” or “sustainability committees” have formed at the building level through this process.

The Assistant Director of Sustainability for Housing & Dining Services is the lead coordinator of the Green Warrior program – an annual outreach and education program aimed at students on campus to pledge to adopt energy, water, transportation, and other conservation and sustainability related practices.

Within Facilities Management there is an Energy Team – who annually prioritizes and implements key projects and opportunities to improve energy and water efficiency in our existing buildings. This cross-disciplinary team of Facilities professionals helps to raise awareness for the importance of energy and water efficiency improvements but actively works to deliver successful projects advancing energy and water efficiency.

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

CSU has a comprehensive Building Automation System (BAS). The system is a Johnson Controls Metasys system. The BAS has direct control over the HVAC equipment in nearly all campus buildings.

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

CSU is in the midst of a major project to convert older outdoor lighting for parking lots and pedestrian walkways to LEDs. LEDs are being replaced inside buildings across campus as funding is available. The energy revolving fund has been used for over $2 million in lighting projects over the past three years. The new on-campus stadium has 100% LEDs both in inside spaces and outside - including the field lighting.

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

In commercial spaces in our climate, there are typically more cooling than heating loads. Therefore, when we employ passive solar techniques for our buildings it is for daylighting, views and connection to the outdoors rather than for space heating.

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

The 800 kW Steam Turbine at the District Energy plant generates electricity (over 3 million kWh/yr) from energy that was previously lost when the pressure was dropped in the plant from generation pressures to distribution pressures.

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):

Facilities Management manages the Energy Reserve Fund, a revolving fund that is used to finance energy & water efficiency projects on campus. This fund is used to implement $1 million/year in energy projects.

In addition, Housing & Dining Services has a Sustainability Fund that supports the price difference between standard and Energy Star/high-performing appliances and equipment.

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.