(a)
Directive 2002/91/EC of the European Parliament and of the Council of 16 December 2002 on the energy performance of buildings · European Union
thermal characteristics of the building (shell and internal partitions, etc.). These characteristics may also include air-tightness;
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Source: EUR-Lex (Cellar) · retrieved 2026-10-30 · Text as adopted (Official Journal); later amendments are not incorporated in this text.