Advocate Lutheran General Hospital

Bed Replacement Tower

Bed Replacement Tower - Park Ridge, Illinois


A new 380,000-square-foot patient tower with 192 private patient rooms. The first floor provides a new main entrance to the hospital and includes a two-story atrium leading to the second-floor pediatric unit. Other functions in the building include three MRI rooms, ICU, oncology, neuro-stroke, and a top-floor mother/baby wing.

G/BA developed life cycle costs for all major equipment, which was selected based on optimal life cycle costs. In addition, we performed early energy modeling to evaluate insulation levels and window performance.

Energy-saving features of the design are credited for a projected 23.3% in energy savings vs. baseline (the version of ASHRAE Standard 90.1 in effect at the time of design). This equates to $185,886 in annual savings. The project has achieved LEED Gold certification.


Source Award
2010 Regional Technology Award, ASHRAE Region VI (first place)
2009 Excellence in Engineering Award, ASHRAE Illinois Chapter


  • A new 45 million-Btu/hr high-efficiency condensing boiler plant, comprising 15 boilers, is one of the largest of its type in the world.
  • The variable-flow heating hot water system serves preheat coils, reheat coils, and radiant heating system.
  • A 1,800-ton variable-primary-flow chiller plant has three 600-ton chillers and cooling towers with VFDs. The chemical-free cooling tower water treatment system received a LEED innovation credit for maximizing energy efficiency and water conservation without the use of harmful chemicals.
  • 300,000 cfm of custom VAV air handling systems utilize fan-wall technology. One air system is capable of negatively pressurizing one entire floor during a local biohazard event.
  • The HEPA-filtered isolation room exhaust system serves 22 isolation rooms.
  • Amine-free clean steam for humidification is generated via steam-to-steam heat exchangers.
  • Water conservation measures include dual-flush water closets and electronic faucets.
  • All roof stormwater spills to a cascading "rainwater garden."
  • Domestic hot water is generated with high-efficiency steam-to-hot water heat exchangers.