Terms related to BVSD energy efficiency projects


BVSD has set ambitious energy goals of 20 percent energy use reduction by 2019 and to be zero net energy capable (ZNEC) districtwide by 2050.

Deep Energy Retrofit

A deep energy retrofit is a whole-building analysis and construction process that seeks to maximize energy efficiency in the renovation project. The scale and scope of work for eight projects in the bond program qualified them for deep energy retrofits. These projects included elements such as major envelope replacement (roof, windows, doors) and major system replacement (boilers, HVAC) which have a significant impact on energy efficiency. In a deep energy retrofit project, the design team views the entire project through the lens of energy efficiency.


Many projects will strive for energy goals using retro-commissioning. Some mechanical equipment will be replaced and other equipment will be "tuned-up" to run as efficiently as possible.

zero net energy capable (ZNEC)

ZNE means a building’s energy use is equal to or less than what can be produced by renewables onsite. Energy use is measured in kBTU/square foot/year and is referred to as Energy Use Intensity (EUI). BVSD’s goal for new construction is 25 EUI because that is the point at which it is economically feasible to purchase onsite renewables. ZNE-Capable buildings are designed to be as energy efficient as possible and to allow for the future installation of renewable energy generators such as photovoltaic panels or wind turbines.