Controls Upgrade at Wallenberg Hall Improves HVAC Scheduling for Big Energy Savings

Thursday, August 30, 2018

Stanford’s Wallenberg Hall is one of the oldest buildings on campus, and offers 78,000 square feet of offices and classrooms. Until recently, and like many older campus buildings, energy-intensive heating, ventilation, and cooling (HVAC) systems ran continuously throughout nights and weekends, even when the building was unoccupied. In 2017, Stanford converted the building’s older pneumatic controls to new electronic DDC controls, an upgrade which enables greater visibility and control over all of the building’s zones to fine-tune energy saving opportunities. The new controls include smart thermostats in every HVAC zone and programming that assigns appropriate schedules for daytime, nights and weekends based on the requirements of the occupants. The project also included upgrades to economizer dampers,  as well as new air temperature and pressure reset strategies, which together are already reducing building energy consumption by 40%. The project was initiated under the Integrated Controls and Analytics Program (iCAP) and was co-funded by Buildings and Grounds Management (BGM) and the Energy Retrofit Program. It is expected to save nearly $100,000/ year.