The U.S. Department of Energy (DOE or the Department) seeks to develop a common definition for Zero Energy Buildings (ZEBs). A broadly accepted market definition of ZEB boundaries and metrics is foundational to efforts by governments, utilities, or private entities to recognize or incentivize zero energy buildings. DOE seeks comments and information related to the zero energy definitions, nomenclature, and implementation guidelines.
More: http://energy.gov/articles/jump-starting-zero-energy-home-design-and-student-careers