Overall Rating Platinum - expired
Overall Score 85.56
Liaison Tonie Miyamoto
Submission Date Feb. 7, 2017
Executive Letter Download

STARS v2.1

Colorado State University
OP-5: Building Energy Consumption

Status Score Responsible Party
3.07 / 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 544,077.40 MMBtu 513,047.90 MMBtu
Electricity from on-site renewables 1,213 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) 1,019,164.90 MMBtu 1,146,907.90 MMBtu
Total 1,564,455.30 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, 2015 June 30, 2016
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 10,823,908 Gross Square Feet 9,840,790 Gross Square Feet

Source-site ratio for grid-purchased electricity:
3.14

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 0.25 MMBtu / GSF 0.28 MMBtu / GSF

Percentage reduction in total building energy consumption (source energy) per unit of floor area from baseline:
10.05

Degree days, performance year (base 65 °F / 18 °C):
Degree days (see help icon above)
Heating degree days 5,473 Degree-Days (°F)
Cooling degree days 734 Degree-Days (°F)

Floor area of energy intensive space, performance year:
Floor Area
Laboratory space 1,395,105 Square Feet
Healthcare space 148,822 Square Feet
Other energy intensive space

EUI-adjusted floor area, performance year:
14,968,864 Gross Square Feet

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

Documentation (e.g. spreadsheet or utility records) to support the performance year energy consumption figures reported above:
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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 efficiency in our existing buildings. This cross-disciplinary team of Facilities professionals helps to raise awareness for the importance of energy efficiency improvements but actively works to deliver successful projects advancing energy 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 has started a major project to convert older outdoor lighting for parking lots and pedestrian walkways to LEDs. Over $130,000 in retrofits were made in the past two year. LEDs are also used in emergency exit lighting across campus and lighting in hard to reach places (for example atriums). The new on-campus stadium (opening Fall 2017) will have 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 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.

In FY16, CSU partnered with the local utility to study the feasibility of installing on campus CHP. Unfortunately, the nearest natural gas line is over a mile away, burdening the project with significant infrastructure costs. The project has promise, but a longer payback than had been hoped for.


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. We have a dedicated retrocomissioning (retroCx) engineer on staff that helps ensure that buildings are tuned up and running at their best.

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:
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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 and complete the Data Inquiry Form.