Stanford Packard Electrical
Engineering Building
Palo Alto, CA


Stanford University’s David Packard Electrical Engineering Building contains classrooms, labs, offices, and a snack shop. As part of Stanford’s energy conservation effort, HVAC controls were upgraded from pneumatic to Direct Digital Controls (DDC) as a cost-savings measure.


  • Phased installation with minimal impact on operational areas of the building
  • Documentation of all On-Site Testing as part of the O&M package
  • Training of Stanford Facilities, Engineering and Energy Personnel


Sunbelt Controls installed a fully-integrated temperature control system incorporating a Lon-based distributed DDC for energy management, equipment monitoring and control, including color graphic workstation. In addition, the system required one EC BOS-6 Network Controller on each floor, one Lon DDC Controller per VAV box and fan coil unit, and an ECNet AX workstation with connections to the EC BOS-6 Network Controllers.

One of the challenges with this project was that it was an occupied, multi-use building and the work took place during normal working hours, so care was taken in order to minimize disruptions and complaints of temperature discomfort. How this was managed was to assess construction impact and to upgrade the system in phases, resulting in greatly reduced complaints and expedited resolution of temperature variations. The phased schedule went as follows:

  1. The core infrastructure
  2. The rough-in and Saturday cutover of the control panels and power
  3. Installation of the field devices and cutover, respectively, one floor at a time
  4. The actuators and associated terminations

What uniquely qualified Sunbelt Controls for this job was the fact that the campus has standardized on LON and Tridium Controls, and our product experience suited the job perfectly.