The current EUI chart for most of Ada County’s buildings. Generally, a low EUI signifies good energy performance.
- 2022 Ada County Energy Use Index (pdf)
- 2021 Ada County Energy Use Index (pdf)
- 2020 Ada County Energy Use Index (pdf)
- 2019 Ada County Energy Use Index (pdf)
- 2018 Ada County Energy Use Index (pdf)
- 2016 Ada County Energy Use Index (pdf)
- 2015 Ada County Energy Use Index (pdf)
- 2014 Ada County Energy Use Index (pdf)
- 2013 Ada County Energy Use Index (pdf)
- 2012 Ada County Energy Use Index (pdf)
- 2011 Ada County Energy Use Index (pdf)
- 2010 Ada County Energy Use Index (pdf)
What is an EUI?
An Energy Use Index is a basic measure of a facility’s energy performance on a per square foot basis. It is typically measured as kBTUs of energy used annually per square foot. A BTU, British Thermal Unit, is a basic measure of heat value (energy content) of fuels. All energy consumed by a particular building; i.e., electricity, natural gas, etc., is converted to a thousand BTU’s, added together, and divided by the total square footage.
Certain building types will always use more energy than others. For example, a park building uses relatively little energy compared to a paramedic station. Similarly, a small office building that supports 80 workers will use less energy than a jail facility that supports hundreds of people on a continual basis 24/7.