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ENERGY STAR Labeled Building Profile

IBEW Local 332
2125 Canoas Garden Ave., Ste.100
San Jose, CA 95125
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The IBEW Local 332 building in San Jose is home to the largest International Brotherhood of Electrical Workers Local in Northern California. It is a 29,000-square-foot, single-story office building that was built in 2001. Its 50 kilowatt on-site solar generation system is one of the first commercial solar power installations in San Jose.

 

In 2010, the IBEW Local 332 brought in TBI Energy to retro-commission the building with the objective of making the facility more energy efficient and finding cost savings opportunities. The building had been maintained to adequate standards since its construction, so there were no major problems with any of the mechanical systems. Inefficiencies in the lighting systems had already been addressed through the use of T-8 lamps, electronic ballasts, and occupancy sensors.

 

One major finding was that the solar PV system was only generating about 50 percent of its rated output. The solar production improved dramatically after a thorough cleaning and a detailed investigation, which resulted in addressing minor wiring problems and a faulty combiner box.

 

The HVAC system had never been fully commissioned when it was originally installed. The retro-commissioning activities included a complete system calibration and air balance, including minor repairs to a number of the VAV boxes. This resulted in a dramatic increase in occupant comfort.

A custom economizer was designed and installed in the central electrical equipment room, which dramatically reduced compressor duty cycle time for this 24/7 conditioned space. Steps were also taken to limit BTU losses from the domestic hot water system by implementing timed scheduling of the hot water recirculation loop.

The single largest energy efficiency improvement came from aggressive programming of the upgraded building management system (BMS). In order to facilitate aggressively optimizing the HVAC system for the IBEW offices, the air conditioning system was altered so that weekend air conditioning would be provided by a smaller rooftop unit. The system schedule changes also limited the number of run hours for the re-heat boiler based on outdoor air temperature, dramatically reducing simultaneous heating and cooling.

The retro-commissioning efforts resulted in a 20 percent decrease in energy use and a dramatic increase in production from the solar PV system. These efforts also resulted in a much more comfortable working environment for the building?s occupants. Earning the ENERGY STAR has been another demonstration of leadership in promoting energy efficiency and implementing alternative energy technologies.

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Testimonial:

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Please note: Narrative information in this profile has been provided by IBEW Local 332 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.

Service Provider:
TBI Construction

Building Owner:*
IBEW Local 332

Property Manager:*
IBEW Local 332

Year(s) Labeled (Rating):
2011 (77)

Facility Type: Office

Total Floorspace: 29000 sf

Year Constructed: 2001

Contract Type: None

Technologies Used:
   Stage 2-Lighting
   Stage 3-Load Reductions
   Stage 5-Heating and Cooling Plant