Nearly Zero Energy Building

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The contentious term Nearly Zero Energy Building will be discussed and finally defined in the CABEE project. The following is the definition according to the European Directive 2012/31/EU (EPBD).

Nearly Zero-Energy Building (nZEB) means a building that has a very high energy performance. The nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby. The energy performance of a nZEB is determined on the basis of the calculated or actural annual energy that is consumed in order to meet the different needs associated with its typical use and shall reflect the heating energy needs and cooling energy needs (energy needed to avoid overheating) to maintain the envisaged temperature conditions of the building, and domestic hot water needs.[1]

According to EU policy targets, by 2020 the renovation and construction of all buildings and infrastructure in the EU will be made to high resource efficiency levels.


  1. European Directive 2012/31/EU: