Loyola University Medical Center

Marcella Niehoff School of Nursing Commissioning

Marcella Niehoff School of Nursing Commissioning - Chicago

Overview

LEED Fundamental and Enhanced Commissioning for a newly constructed 58,000-square-foot educational building, including mechanical, electrical, and plumbing systems.

The project achieved LEED Gold certification.

Features

  • Commissioned systems included a 400-ton chiller plant with hydronic economizer, cross-connected to a campus chilled water loop; a heating plant with steam from a campus steam loop; a displacement ventilation air handling unit with sensible and energy recovery heat wheels; a dedicated outdoor air system for ventilation air; a slab radiant cooling system; a solar shaft to preheat outdoor air in winter and serve as a relief chimney during natural ventilation; automatic operable windows for natural ventilation;  and lighting systems with daylight harvesting controls.
  • Examples of issues uncovered and resolved during functional performance testing included inoperable and improperly operating windows (natural ventilation mode); hydronic economizer changeover setpoint too low (resulting in excessive chiller operation); and relative humidity sensors for the AHU reading inaccurately low, causing humidifiers to run unnecessarily.
  • Terminal air boxes serving bathrooms were removed from the list of boxes resetting the AHU static pressure. This improvement resulted in a reduction of the setpoint and reduction of fan energy consumption.