Advocate Good Samaritan Hospital

Downers Grove, IL

Advocate Good Samaritan Hospital, exterior


GBA retro-commissioned the hospital’s air-handling systems as part of a ComEd incentive program. The project resulted in verified energy savings of $62,959 annually, with a project payback period of 0.17 year.


Advocate Good Samaritan Hospital, a 333-bed 1,065,400-square-foot community facility, opened in 1976. It includes the only Level 1 Trauma Center in DuPage County. A retro-commissioning effort improved the facility’s operating efficiency.

  • The focus of this project was the retro-commissioning of 18 main air-handling units (AHUs) and their associated DDC controls.
  • Each AHU within the project scope was functionally tested for operational deficiencies
  • Six retro-commissioning measures (RCMs) were implemented, resulting in verified savings of 378,688 kWh and 43,905 therms.
  • RCMs implemented included:
    • Equipment operation scheduling.
    • Static pressure reset.
    • Economizer optimization.
    • Supply air temperature reset for single-duct AHUs.
    • Supply air temperature reset for dual-duct AHUs.
    • Nighttime zone airflow setback.
  • Through scheduling equipment to turn off at night, the facility was able to save approximately $16,416 annually. This measure had a simple payback period of 0.08 year.

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