Eastern Connecticut State University Campus Retro-Commissioning

Energy improvements, staff training, & occupant satisfaction on campus.

Colliers Project Leaders was engaged to provide retro-commissioning services as part of Eastern Connecticut State University’s participation in the Connecticut Energy Efficiency Fund’s Retro-Commissioning Program. Colliers Project Leaders performed a retro-commissioning survey of thirteen academic, residence hall, dining hall, library, student center, public safety, heating plant and science center buildings encompassing 688,183 square feet.

Objectives of the retro-commissioning survey included:

• Improve building energy and operating performance
• Identify and resolve building system operation control and maintenance issues
• Improve the buildings’ ENERGY STAR rating
• Document system operation, identify O&M staff training needs
• Increase equipment life-cycle
• Reduce or eliminate occupant complaints and increase inhabitant satisfaction
• Ensure the persistence of the improvements over the buildings’ life

Our proposed solutions to reduce the University’s energy consumption included:

• Implement unoccupied air flow setpoints for the Science Building
• Install dual enthalpy economizer sequences
• Implement demand control ventilation sequences
• Apply critical valve differential pressure reset on hydronic systems
• Implement critical zone static pressure reset on VAV systems
• Reduced CHW pumping to increase Delta T