ZNE Demonstration- Integration of Dynamic Daylighting and Passive Cooling/Heating for High Return on Investment
ZNE commercial office retrofit using emerging and mature technologies that is widely replicable to other commecial buildings.
Research project completed in 2017. Electricity consumption was reduced by up to 75% and electricity cost by up to 86%. The PV system produced enough electricity to meet the building's needs for the year, resulting in a surplus of 15,886 kWh of electricity. Technology is now commercially available and is being implemented in commercial buildings across the United States, as well as in parts of Canada.
This project resulted in the design, construction, and demonstration of an affordable approach for renovating commercial buildings. This broadly replicable approach uses an integrated technology package that includes a combination of eight emerging and mature technologies. These technologies include LED lighting, plug-load management, dynamic windows, sky lights, extreme insulation, night flushing, building controls. These technologies were installed in a 33,750 square foot office in Sunnyvale.
This project showed that a ZNE retrofit can increase net value of a building, aided by a premium lease to overcome the incremental costs. Multiple avenues of public outreach and education have created high exposure to the demonst
For the first year of operation, the actual annual operating expenses was $5.40 per square feet less compared to the average operating expense for the building owner's other portfolio of buildings. This results in annual savings
The $5.40 per square foot increase in operating income equals $83.00 per square feet in increased net value. Additionally, the building achieved a lease premium of $3.60 per square foot annually over a standard Title 24 building
The results of the project will be publicized to the construction, banking, and public policy communities, driving awareness, catalyzing replication and accelerating benefits to California ratepayers.
Key Project Members
Integral Group, Inc.
Hillhouse Construction Company, Inc.
Sharp Development Company, Inc.
Energy Building Strategies, LLC