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Ascension Health

Ascension Health

Energy Performance


20% Reduction in Energy Intensity by 2020 from a 2008 Baseline


35 Million Square Feet


Cumulative (vs. Baseline) 10%
Annual (2012) 2%

Ascension Health Building

Portfolio Energy Performance

Better Buildings Challenge Partners strive to decrease portfolio-wide source energy use intensity (EUI) and to increase the percent improvement compared to a set baseline. Ascension Health's portfolio consists of 71 hospitals and over 35 million square feet. Since 2008, Ascension Health has improved energy performance by 10 percent. Strategies to continue energy reduction include: conducting energy audits, commissioning, and retro-commissioning projects; optimizing Building Automation Systems; installation of variable-speed drives; and improving building systems as part of infrastructure renewal through the Facility Infrastructure Pool.

Energy Performance by Facility

Looking at the percent improvement in energy performance across all facilities can provide insight into how an organization is saving energy. Ascension Health will continue to employ commissioning and retro-commissioning projects to identify facilities where energy efficiency interventions are required. In addition, System-wide projects such as Operating Room occupied-unoccupied setbacks are planned.

Identifying Opportunities for Improvement

Facility-level energy performance metrics, including EUI and percent improvement to date, are critical to track progress over time and identify opportunities for additional energy savings. Ascension Health’s portfolio consists of facilities with a range of baseline EUI values between 200 to 800 kBtu/sq. ft. The portfolio spans small suburban and semi-rural critical access facilities with lower energy use intensity, to very large urban acute care hospitals with much higher energy intensity. The facilities located near or below the 0% axis may present good opportunities for further savings.