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1.2. How energy savings measurements should be normalised

Energy savings shall be determined by measuring and/or estimating consumption, before and after the implementation of the measure, while ensuring adjustment and normalisation for external conditions commonly affecting energy use. Conditions commonly affecting energy use may also differ over time. Such conditions may be the likely impact of one or several plausible factors, such as: weather conditions, such as degree days; occupancy levels; opening hours for non-domestic buildings; installed equipment intensity (plant throughput); product mix; plant throughput, level of production, volume or added value, including changes in GDP level; schedules for installation and vehicles; relationship with other units.

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Source: EUR-Lex (Cellar) · retrieved 2026-10-29 · Text as adopted (Official Journal); later amendments are not incorporated in this text.