The Ronald V. Dellums Federal Building complex in Oakland, California consists of two identical towers topped with pyramid-shaped roofs, echoing similar landmarks such as the Alameda County Courthouse. The towers are connected by a ground level rotunda and an elevated sky bridge. The podium of one of the towers houses a federal courthouse. It is managed by the General Services Administration (GSA).
The GSA is the biggest property owner and lessee in the United States and has a building portfolio consisting of over 9,600 facilities, with a total combined floor area of approximately 370 million square feet, and over one million employees.
This project was part of a set of GSA buildings (included in the Buildings Database) that Lawrence Berkeley National Laboratory (LBNL) provided technical expertise for as part of the DOE Commercial Building Partnership program. The projects targeted lighting system retrofits, although some also included HVAC efficiency measures as well. The energy efficiency goals were looking at the set of projects versus the individual projects. Also please note that the retrofit measures are being applied to portions of the building versus the overall building. The projects were also part of the GSA Green Proving Ground project where technologies and energy efficiency strategies are implemented in projects and then monitored prior to implementing them into a larger portion of the GSA portfolio.
Lighting retrofit measures implemented for Open office cubicles — downlights tuned to 40% input power, uplights tuned to 20% input power, occupancy-based control throughout. Daylit private offices — light levels maintained at 50 fc within a range of 20%-30% input power. Non-daylit spaces (private offices and transition areas) — light levels tuned to 30%-35% input power.