TOWARDS 2020 – NEARLY ZERO-ENERGY BUILDINGS

Directive 2010/31/EU Article 9 requires that “Member States shall ensure that by 31 December 2020 all new buildings are nearly zero-energy buildings; and after 31 December 2018, new buildings occupied and owned by public authorities are nearly zero-energy buildings”. A nearly zero-energy building is defined in Article 2of the EPBD recast as “a building that has a very high energy performance. The nearly zero or very lo01w 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”.

Typically,low-energy buildings will encompass a high level of insulation,very energy efficient windows,a high level of air tightness and natural/mechanical ventilation with very efficient heat recovery to reduce heating/cooling needs.Passive solar building design may boost their energy performance to very high levels by enabling the building to collect solar heat in winter and reject solar heat in summer and/or by integrating active solar technologies.
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