Project Summary:

  • 72,877 square feet of office and administrative space.
  • Expected utility savings per year of $97,874.
  • Reduction of electricty usage of 227,716 kwh.
  • Reduction in greenhouse gas emissions of 454 metric tons CO2.

Project Highlights:

  • Lighting fixture upgrade.
  • Wireless motion detectors installed for lighting and space temperature set back control.
  • Rewired all of the existing DDC controlled VAV terminals and fan coils to allow for temperature set back control using motion detectors.
  • Implemented new optimization sequences for air handling systems
  • Calculated energy reduction (using 2011 utility data as a baseline): electricity 8.1%; chilled water 7.6%; and steam 8.2%.

Project Description and Approach: 

The project consisted of a building wide upgrade & re-commissioning of existing lighting and HVAC systems to maximize energy savings and improve overall operation. Project duration was January to August 2012.

The lighting upgrade included identification and replacement of all existing lower efficiency fixtures, and a building wide installation of motion detectors for lighting control based on motion detection. The same motion detectors are being used to provide unoccupied temperature set back control for all existing DDC controlled fan coils, VAV terminals and radiant heat in the building.

The HVAC infrastructure, including 5 main air handling systems, radiant heat, fan coil units, VAV terminals and hot & chilled water distribution systems were thoroughly re-commissioned and optimized. The first step in the process involved a point to point identification and repair of system components. After all repairs were made, new software programming measures were implemented to maximize operational efficiency including demand ventilation control using CO2 sensors.

Our third party commissioning agent (CXA) maintained a log of all Action Items, identified and re-verified subsequent repairs throughout the process. The CXA also performed functional testing and trending of all systems at the end of the project to verify that the new sequences are operating as intended.