One Embarcadero Center
One Embarcadero Center 42nd Floor Engineering Office
San Francisco, CA 94111
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Energy management at One Embarcadero Center begins with proper preventive maintenance and repair of the installed systems. The energy management team started at this point in the early 1980's with the retrofit of lighting fixtures using optical reflectors and de-lamping strategies that changed existing four-lamp fixtures to two-lamp fixtures using reflectors. In combination with the installation of proportionally controlled valves on the HVAC equipment, automated start/ stop controls, and adjustable reset schedules for the HVAC operation, these changes increased energy efficiency.
After completing retrofits of the installed systems, the team introduced an energy management control system (EMCS) and hybrid direct digital control (DDC) interfaces, as well as variable frequency drive (VFD) technologies and strategies to both the water and air sides of the existing HVAC systems to further enhance the building's comfort and their control of the large, energy-consuming systems.
Through the 1990's, occupancy sensors and timed and staged controllability of the lighting systems were added to enhance building performance. The team also completed lighting retrofits to T-8 lamp and electronic ballast technology and added more efficient optical reflectors to increase energy savings and improve the quality of lighting. Along the way, the building specification for lighting installations required the use of energy-efficient fixtures, sensors, and technologies as a standard for all tenant improvement work. The replacement of an older, less-efficient chiller with a new (non-CFC) variable speed drive chiller to more efficiently handle low load periods was done mid-decade. The evolution of building codes, such as Title 24 in California, was key to supporting these moves, as was the availability of state and utility rebate programs to incentivize and improve ROI calculations.
From 2000 to present, additional lighting retrofits using technologies such as T1 systems, LED, and cold cathode lamps were performed. Expanded use of occupancy sensors and sentry switching were explored and deployed where suitable to increase the OFF time during both peak and non-peak operating hours.
In 2004, the installation of 3M-NV25 solar reflective window film was performed on the elevations of the building affected by the sun to contain the heat gain that impacted the building's HVAC system and operation, reducing loads during those high solar days.
In 2007, the energy management team installed a new DDC BACnet compatible energy management front end and backbone infrastructure to begin phasing out the older EMCS system and technologies from pneumatic-DDC to direct DDC technology. This work is on-going and will transition over time (through the tenant improvement process as well as intentional owner capital projects) to a full DDC system.
In 2008, numerous improvements further enhanced the energy performance of the building, including the launch of additional de-lamping strategies, cold cathode lamps in retail common areas, as well as changes in the building's holiday lighting schemes and the installation of occupancy sensors in stairwells as well as on all parking garage light fixtures. During this year, the building earned the ENERGY STAR for superior energy performance for the first time with a score of 81 and earned it again the following year with a score of 83.
In December of 2010, we finished a conversion of the building's central plant operating systems over to our new DDC BACnet platform and are running new operating strategies now to enhance energy and building performance. The building again qualified for the ENERGY STAR for the third consecutive year, earning it in 2010 with a score of 81.
In 2011, we have started and will be replacing the 40-year-old water booster system with a new platform utilizing VFD technology, microprocessor controls, and integration with the building management system (BMS).
With regards to water consumption, in San Francisco, we have adjusted our building specifications to require that all new toilets and urinals be high efficiency or ultra low flush technology and are replacing some of the older units throughout the building in 2011.
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Testimonial:
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Please note: Narrative information in this profile has been provided by Boston Properties or a representative of this facility. Other building information was verified and submitted to EPA at the time of application. Building energy performance, operating characteristics, and ownership/management may be subject to change over time.
Building Owner:*
Boston Properties
Property Manager:*
N/A
Year(s) Labeled (Rating):
2008 (81)
2009 (83)
2010 (81)
2011 (77)
2012 (79)
2013 (79)
2014 (77)
2015 (78)
2016 (78)
Facility Type: Office
Total Floorspace: 833539 sf
Year Constructed: 1971
Contract Type: Multiple Contractor Contracts
Financing Type: Internal Capital
Technologies Used:
| Stage 1-Recommissioning |
| Stage 2-Lighting |
| Stage 3-Load Reductions |
| Stage 4-Fan Systems |
| Stage 5-Heating and Cooling Plant |
| Other Technologies/Strategies |