Killeen Independent School District Energy Efficiency Report
EUI – Energy Use Index
The National Median Source EUI is recommended benchmark metric for all buildings. The median value is the middle of the
national population - half of buildings use more energy, half use less. The median works better than the mean (arithmetic
average) for comparing relative energy performance, because it more accurately reflects the midpoint of energy use for most
property types.
The following table presents the median in both site EUI and source EUI. Site EUI is what you may be familiar with from your
utility bills. Site EUI contains a mixture of what is called primary energy (i.e., a raw fuel like natural gas) and secondary energy
(i.e., a converted product like electricity or district steam). Site EUI is a local, not national value that varies across climate
zones. Source energy provides the most equitable way to combine primary and secondary energy types into a single common
unit, ensuring that no building receives either a credit or a penalty based on its energy source or utility.
While almost all commercial building types have a national Median Source EUI, some will also have a 1-100 ENERGY STAR
Score. The score evaluates a building relative to its peers, similar to the median energy use values, and also adjusts for
climate and business activity.
The right-most column in the table indicates the reference data source we use to determine the median performance of
buildings in your peer group. To compute the national median, we always rely on nationally representative data. For the
majority of property types, the reference data is from the Commercial Building Energy Consumption Survey (CBECS). This is a
national survey conducted by the U.S. Department Energy's Energy Information Administration. As indicated by the table
below the Source EUI for K – 12 is 141.2 KBTU/ft² while the Site EUI is 58.2 KBTU/ft²
EUI – Energy Use Index
In 2014, “Texas School District Energy Management Study: The Status of Energy Management in Texas Schools” was published
and presented at TASBO by Gavin Dillingham, Ph.D of the Houston Advanced Research Center and Jennifer Duplessis, MBA,
ATEM, CEM of Arlington ISD. The document is a study of the state of energy management programs in Texas school districts.
The information contained in the study was compiled from a survey gathering energy information representing over 182
million square feet of Texas school district space. The school districts surveyed displayed EUIs ranging from 26 to 69. Currently,
KISD’s average EUI is 32.
Energy Star Scoring and
Certification
• ENERGY STAR certified buildings save energy, save money, and help
protect the environment by generating fewer greenhouse gas
emissions than typical buildings. To be certified as ENERGY STAR, a
building must meet strict energy performance standards set by EPA.
• Specifically, to be eligible for ENERGY STAR certification, a building
must earn an a score of 75 or higher, indicating that it performs better
than at least 75 percent of similar buildings nationwide. Through
Portfolio Manager, EPA delivers ENERGY STAR scores ranging from 1
to 100 for many types of buildings. The ENERGY STAR score accounts
for differences in operating conditions, regional weather data, and
other important considerations.
Green fill in the EUI column indicates an EUI < 58. Green in the Energy Star column indicates a score of 75
or greater.
Killeen ISD Energy Star Scorecard
Killeen ISD Energy Star Scorecard
Killeen ISD Energy Star Scorecard
Killeen ISD Energy Star Scorecard
Killeen ISD Energy Star Scorecard
Killeen ISD Energy Star Scorecard
100% of KISD campuses have EUI numbers below the regional average.
Over 95% of KISD campuses have achieved a qualifying score of 75 or
greater. Of those campuses 77% scored 90 or better. Campuses that
scored below 75 have been investigated and have undergone corrective
measures that will bring their scores up high enough to qualify for
Energy star certification in the near future.
Square Footage and Cost per Ft²
• Over the past 10 years, KISD has grown by almost 1 million ft².
Year
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
Total Ft²
5,327,943
5,480,967
5,483,967
5,750,467
5,750,467
5,871,998
6,005,583
6,035,583
6,157,114
6,263,377
6,324,991
Cost and Total Ft² Trends
Year
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
Sum of Cost
5,638,902.49
6,390,058.89
6,408,675.97
7,246,381.88
7,597,833.91
7,655,454.98
8,461,738.34
8,430,701.03
7,443,083.00
7,190,868.61
7,197,822.55
AVG Cost/Ft²
$1.10
$1.19
$1.20
$1.30
$1.37
$1.37
$1.48
$1.47
$1.28
$1.21
$1.20
Total Ft²
5,327,943
5,480,967
5,483,967
5,750,467
5,750,467
5,871,998
6,005,583
6,035,583
6,157,114
6,263,377
6,324,991
FY 2016 Utility Cost Summary Pie Chart