Zero-energy building

Not to be confused with Zero carbon housing.
Zero-energy test building in Tallinn, Estonia. Tallinn University of Technology.
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A Zero-Energy Building (ZEB), also known as a Net Zero-Energy (NZE) building, is a building with net zero energy consumption, meaning the total amount of energy used by the building on an annual basis is equal to the amount of renewable energy created on the site[1][2] or in other definitions by renewable energy sources offsite, using technology such as heat pumps, high efficiency windows and insulation, and solar panels.[3]

The goal is that these buildings contribute less overall greenhouse gas to the atmosphere during operation than similar non-ZNE buildings. They do at times consume non-renewable energy and produce greenhouse gases, but at other times reduce energy consumption and greenhouse gas production elsewhere by the same amount. The development of zero-energy buildings is encouraged by the desire to have less of an impact on the environment, and their expansion is encouraged by tax breaks and savings on energy costs which make zero-energy buildings financially viable.

Terminology tends to vary between countries, agencies, cities, towns, and reports, so a general knowledge of this concept and its various uses is essential for a versatile understanding of clean energy and renewables.[4][5][6] The International Energy Agency (IEA) and European Union (EU) most commonly use "Net Zero Energy", with the term "zero net" being mainly used in the US. A similar concept approved and implemented by the European Union and other agreeing countries is nearly Zero Energy Building (nZEB), with the goal of having all new buildings in the region under nZEB standards by 2020.[7]

  1. ^ "Zero Energy Buildings: A Critical Look at the Definition Paul Torcellini, Shanti Pless, Michael Deru National Renewable Energy Laboratory; Drury Crawley, U.S. Department of Energy. The term net-zero energy building (NZEB) should not be used to avoid confusion, because the EU defined already the nearly Zero Energy Building (nZEB), which is completely different to the net-zero energy building. In the EU net zero building is most commonly defined as a building with zero energy AND zero CO2 emissions on an annual balance and only for the performance of the building, the Grey Emissions are not included. National Renewable Energy Laboratory report: NREL/CP-550-39833 June, 2006" (PDF).
  2. ^ "A Common Definition for Zero Energy Buildings" (PDF). US Department of Energy. September 2015.
  3. ^ ""Net-Zero Energy Buildings: A Classification System Based on Renewable Energy Supply Options." Shanti Pless and Paul Torcellini. National Renewable Energy Laboratory report: NREL/TP-5500-44586, June 2010" (PDF).
  4. ^ Cite error: The named reference zebdef was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Ürge-Vorsatz was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference Harvey was invoked but never defined (see the help page).
  7. ^ "Nearly Zero Energy Buildings". European Union. 2014-07-31.