- Essentially, EUI expresses a building’s energy use as a function of its size or other characteristics. EUI is expressed as energy per square foot per year. It’s calculated by dividing the total energy consumed by the building in one year by the total gross floor area of the building.
- Generally, a low EUI signifies good energy performance. However, certain property types will always use more energy than others.
- So, what really matters is the reduction of EUI and not the energy per se. Energy bills may vary based on changes in the unit cost. But EUI is a standard measure.