How to Interpret Your Data

Energy Use Intensity (EUI) is expressed as energy per square foot per year. It’s calculated by dividing the total electric energy consumed by the facility in one year by the total square footage of the facility (measured in kilowatt hour per square foot, or kWh/sf), based on electric utility data and property tax assessor data.

Visit Travis County Appraisal District or Williamson County Appraisal District for more information.

Generally, a low EUI signifies good energy performance, while a high EUI may indicate room for improvement. 

W/sf indicates the wattage (W), or maximum demand power per square foot (W/sf) Austin Energy recorded at your facility during a billing cycle. Customers with a high demand consume more power, and have a higher cost to serve. 

It’s worth checking into the W/sf at your facility since a high W/sf may be a result of older, less efficient equipment. Making upgrades may allow you to reduce your power demand and move to a lower rate schedule, saving you money in the process.

Min Pf indicates the minimum power factor Austin Energy recorded at your facility during a billing cycle. Power factor is a measure of how effectively electric power is consumed at commercial and industrial facilities.

Customers who have a low power factor (lower than .9) draw more electric current over an interval of time and have a higher cost to serve.  A low power factor results in greater system losses, and requires Austin Energy to install or purchase additional capacity.

Customers with a high power factor (.9 or higher) consume energy more effectively and, as a result, have a lower cost to serve.

Learn how to increase your power factor

All customers served by Austin Energy are ranked by type of use and EUI, and then this ranking is applied to a scale from 100 to 1.

A facility with a percentile rank close to 100 is more efficient. Austin Energy recommends investigating energy efficiency improvements if your facility has a percentile rank below 50.

Quartiles are EUI ranking subsets. A facility with a ranking higher than 75 is more efficient than most facilities with similar uses, and is in the "upper quartile". 

Facilities with ranking below 25 use more energy per square foot than similar facilities. Austin Energy recommends investigating energy efficiency improvements if your building ranks below 50.