ENERGY STAR Score for Hospitals (General Medical and Surgical)

The ENERGY STAR Score for Hospitals applies to general medical and surgical hospitals, including critical access hospitals and children’s hospitals. The objective of the ENERGY STAR score is to provide a fair assessment of the energy performance of a property relative to its peers, taking into account the climate, weather, and business activities at the property. To identify the aspects of building activity that are significant drivers of energy use and then normalize for those factors, a statistical analysis of the peer building population is performed. The result of this analysis is an equation that will predict the energy use of a property, based on its experienced business activities. The energy use prediction for a building is compared to its actual energy use to yield a 1 to 100 percentile ranking of performance, relative to the national population.

  • Property Types. The ENERGY STAR score for hospitals applies to general and medical hospitals, including critical access hospitals and children’s hospitals. The score applies to an entire hospital whether it is a single building or a campus of buildings. 
  • Reference Data. The analysis for hospitals is based on data from an industry survey conducted by the America Society for Healthcare Engineering (ASHE), a personal membership society of the American Hospital Association (AHA). 
  • Adjustments for Weather and Business Activity. The analysis includes adjustments for:
    • Building Size
    • Number of Full-Time Equivalent Workers
    • Number of Staffed Beds
    • Number of MRI Machines
    • Weather and Climate (using Cooling Degree Days, retrieved based on Zip code)
  • Release Date. The ENERGY STAR score for hospitals is updated periodically as more recent data becomes available:
    • Most Recent Update: November 2011
    • Original Release: November 2001

This document presents details on the development of the 1 - 100 ENERGY STAR score for hospitals. More information on the overall approach to develop ENERGY STAR scores is covered in our Technical Reference for the ENERGY STAR Score, available at www.energystar.gov/ENERGYSTARScore. The subsequent sections of this document offer specific details on the development of the ENERGY STAR score for hospitals.