Advocate Illinois Masonic Medical Center (AIMMC) is a 1,143,379-sq-ft hospital with a century-long record of service to Chicago’s north side. The facility is part of the Advocate Health Care network, which includes 13 hospitals and more than three dozen outpatient sites. The network has a strong commitment to environmental responsibility, recognized by the Illinois Sustainable Technology Center’s Governor’s Sustainability Award and by multiple System for Change Awards from Practice Greenhealth. AIMMC was Chicago’s first hospital to earn the EPA’s Energy Star designation in 2008.

Advocate recently targeted AIMMC for a major chiller plant overhaul, with the goals of providing a more reliable cooling system, improving energy efficiency, reducing staff labor related to chiller plant maintenance, and shifting to Montreal Protocol-compliant refrigerants. During planning, water conservation emerged as an additional benefit.