Sustainability · Defined
Energy use intensity (EUI)
Energy consumption expressed per unit of building area over a stated period. It allows energy use to be discussed alongside building size.
Why it matters
Site EUI and source EUI are different metrics and should not be mixed. Property use, operating hours, weather, and data completeness also affect comparisons. A lower reported value is only meaningful when the measurement basis is understood.
In practice
A project example
Two properties may have similar floor areas but different operating schedules. Their EUI difference needs context before it is treated as an efficiency gap.
Technical references
General educational guidance from KOW Building Consultants. Examples are illustrative, not project records. The applicable contract, standard, program, and jurisdiction control the requirements for a specific assignment.