3.

The methodology shall be laid down taking into consideration at least the following aspects: the following actual thermal characteristics of the building including its internal partitions: thermal capacity; insulation; passive heating; cooling elements; and thermal bridges; heating installation and hot water supply, including their insulation characteristics; air-conditioning installations; natural and mechanical ventilation which may include air-tightness; built-in lighting installation (mainly in the non-residential sector); the design, positioning and orientation of the building, including outdoor climate; passive solar systems and solar protection; indoor climatic conditions, including the designed indoor climate; internal loads.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-28 · Text as adopted (Official Journal); later amendments are not incorporated in this text.