Updates to ENERGY STAR scores with CBECS data

For most types of commercial buildings, the 1 – 100 ENERGY STAR score is based on the Commercial Buildings Energy Consumption Survey (CBECS), which is conducted about once every four years by the Energy Information Administration (EIA). New CBECS data will be available in late 2015, when EIA releases the results of its 2012 survey.
 
The table below provides a quick overview of each 1-100 ENERGY STAR score’s data source and most recent update. Most of the scores rely on data from CBECS. EIA was unable to publish the 2007 CBECS; therefore, many of the scores still rely on data from prior CBECS. Once EPA has access to the CBECS 2012 data, we will conduct extensive analyses to begin the process of updating our existing ENERGY STAR scores as well as develop scores for additional types of buildings.

Learn more

EPA is hosting a series of webinars to keep you informed and gather your input throughout the process of updating the 1 – 100 ENERGY STAR scores. All webinars will be publicly announced, recorded, and available to watch at any time on the ENERGY STAR training portal. Already recorded webinars are listed below, followed by upcoming presentations that will be announced roughly one month before broadcast.

Tell us what you think!

EPA is gathering feedback on score development throughout this process via webinars and the ENERGY STAR buildings help desk. EPA is currently assessing technical issues related to score development and invites those with technical expertise and familiarity with ENERGY STAR score methodology to provide feedback on the following topics.
  • Data Source: Are there other nationally representative sources that EPA should review in addition to CBECS?
  • Dependent Variable: What is the most appropriate dependent variable of our analysis?
    • EUI is the current dependent variable
    • Used Ln(energy) before score revisions with CBECS 2003 data
  • Combining Property Types: What is the best way to assess mixed use properties? (e.g., office, retail, and multifamily in one building)
    • Currently we create one predicted energy for the whole building and then create a score lookup table weighted by the predicted energy
    • By this approach, the most energy intensive spaces are weighted most heavily so that the score will motivate efficiency in those spaces first
  • Fitting the Distribution: How should the distribution of energy be mapped into the score?  Should EPA fit the data with a smooth curve? If so, what fitting method should be applied?

Can’t wait for a webinar? Have questions? Browse FAQs or submit a new question at our online ENERGY STAR buildings help desk.

List of 1-100 ENERGY STAR scores and data sources

Space Type

Release Date

Source of Data

Collection Date(s)

Data Center

2010

EPA Survey

2008/2009

Hospital

2001

2011

Industry Survey

Industry Survey

1997

2008

Hotel

2002

2009

Industry Survey

CBECS

1999

2003

K-12 School

2000

2004

2009

CBECS

CBECS

CBECS

1995

1999

2003

Medical Office*

2004

CBECS

1999

Multifamily Housing

2014 Industry Survey 2011

Office

1999

2004

2007

CBECS

CBECS

CBECS

1995

1999

2003

Residence Hall/Dormitory*

2004

CBECS

1999

Retail Store

2007

CBECS

2003

Senior Care Community

2011

Industry Survey

2008/2009

Supermarket

2001

2008

CBECS

CBECS

1992 & 1995

1999 & 2003

Warehouse

2004

2009

CBECS

CBECS

1999

2003

Wastewater Treatment Plant*

2007

Industry Survey

2004

Worship Facility

2009

CBECS

2003

*Not eligible for ENERGY STAR certification