Overall Rating Gold - expired
Overall Score 72.18
Liaison Ryan Todd
Submission Date May 9, 2016
Executive Letter Download

STARS v2.0

California State University, Sacramento
OP-8: Building Energy Consumption

Status Score Responsible Party
Complete 1.98 / 6.00 Nathaniel Martin
Energy Coordinator
Facilities Management—Sustainability
"---" indicates that no data was submitted for this field

Total building energy consumption, all sources (transportation fuels excluded):
Performance Year Baseline Year
Total building energy consumption 250,017 MMBtu 257,086 MMBtu

Purchased electricity and steam:
Performance Year Baseline Year
Grid-purchased electricity 149,871 MMBtu 146,999 MMBtu
District steam/hot water 0 MMBtu 0 MMBtu

Gross floor area of building space::
Performance Year Baseline Year
Gross floor area 5,166,951 Gross square feet 5,166,951 Gross square feet

Floor area of energy intensive space, performance year::
Floor Area
Laboratory space 246,317 Square feet
Healthcare space 145,843 Square feet
Other energy intensive space

Degree days, performance year (base 65 °F)::
Degree days (see help icon above)
Heating degree days 1,441
Cooling degree days 1,804

Source-site ratios::
Source-Site Ratio (see help icon above)
Grid-purchased electricity 3.14
District steam/hot water 1.20

Start and end dates of the performance year and baseline year (or 3-year periods)::
Start Date End Date
Performance Year Aug. 1, 2014 July 31, 2015
Baseline Year Aug. 1, 2013 July 31, 2014

A brief description of when and why the building energy consumption baseline was adopted:

Since this is the first time Sac State is completing the STARS report, the performance year was chosen based on the most recent 12 month period prior to starting work on the STARS report. Sac State started working on the STARS report in September 2015. The baseline year was determined by choosing the next 12 month period prior to the performance year so that the data being looked at for both date ranges would include the last 2 years to include the campus’ most recent sustainability efforts and achievements.

A brief description of any building temperature standards employed by the institution:

Facilities Services takes the following steps to efficiently utilize natural gas and electricity to meet the heating and cooling needs of the campus:
• Interior building temperatures will be maintained at 68 degrees F in the winter and 78 degrees F in the summer.
• Domestic hot water temperatures will not be set above 115 degrees F.
• All air conditioning equipment and fans will be shut off on weekends, holidays, and nightly, wherever appropriate.
• During working hours, ventilation will be maintained to meet health and safety standards.
• Windows and doors should remain closed at all times to prevent loss of conditioned air. It is impossible to maintain controlled conditions if windows are open in offices or classrooms.
• Heat generating equipment and large items of furniture, such as bookshelves or cabinets, should not be set in front of thermostats to prevent false temperature readings and cause over-cooling or under-heating.
• Use of portable electric heaters and fans is not allowed unless authorized by the campus Energy Coordinator. Approval is dependent upon medical need or failure of the building heating and ventilating systems.

A brief description of any light emitting diode (LED) lighting employed by the institution:

LED Street Lighting Project:
Sac State has replaced all the old High Pressure Sodium cobra head street lighting fixtures with energy efficient LED street lights. The project has resulted in 54% energy savings, reduced maintenance costs, and better lighting quality, color, and improved security.
Gym LED Lighting Retrofit:
Sac State replaced 30 existing High Pressure Sodium lights in Yosemite Hall’s North Gym with 20 LED lamps with individual occupancy sensors that resulted in 73% energy savings, reduced maintenance cost due to longer lamp life, and better lighting quality and color.
The campus is currently in design for pilot LED lighting project with advanced controls, which should start construction in the first quarter of 2016.

A brief description of any occupancy and/or vacancy sensors employed by the institution:

In 1996 the University completed a campus wide lighting retrofit project converting from T-12 fluorescent tubes to T-8 fluorescent tubes with either wall or ceiling mounted occupancy sensors as part of the project. With this project every office and class room on campus received occupancy sensors. All retrofit projects or remodels have been constructed with occupancy sensors, as well as any new construction projects after 1996 based on code.

A brief description of any passive solar heating employed by the institution:


A brief description of any ground-source heat pumps employed by the institution:


A brief description of any cogeneration technologies employed by the institution:


A brief description of any building recommissioning or retrofit program employed by the institution:

The 100,041 GSF, Academic Information Resource Center (AIRC) building was built in 2005. In 2008, Sac State noticed some problems with ventilation, and hired a third party to Retro-commission the entire building’s ventilation system, including some corrective redesign of the underfloor air distribution system.

A brief description of any energy metering and management systems employed by the institution:

Installation of 58 smart electric meters was completed in 2013 on Sac State’s campus buildings (including non-State buildings); these meters report to an Energy Information System (EIS) software.
Sac State is currently in the design phase to install approximately 167 smart meters which consist of the following: smart gas meters, smart water meters, and smart Btu meters which will all communicate to the existing EIS software.

A brief description of the institution's program to replace energy-consuming appliances, equipment and systems with high efficiency alternatives:

Sac State requires Energy Star rating for all appliances and or high efficiency rating as stated in the campus Sustainability Guidelines regarding energy.

A brief description of any energy-efficient landscape design initiatives employed by the institution:

Sac State converted the existing sprinkler heads to low-gallon sprinkler heads, integrated all irrigation controllers to the Rainbird Maxicom irrigation control system. The Maxicom system is now connect to the campus weather station to automate weather related shut-downs and start-up to conserve irrigation.

A brief description of any vending machine sensors, lightless machines, or LED-lit machines employed by the institution:

Sac State has approximately 101 vending machine on campus, and has installed Vending Misers on all non-perishable food item vending machines. The machines with Vending Misers installed represents about 97% of the machines on campus.

A brief description of other energy conservation and efficiency initiatives employed by the institution:

Please guidelines listed in the below URL section.

The website URL where information about the institution’s energy conservation and efficiency initiatives is available:
Data source(s) and notes about 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.