What is EUI (units and meaning) and why is it helpful to know the EUI of two buildings when comparing energy performance

EUI stands for Energy Use Intensity and it is an expression of how much energy is consumed per building unit of floor area. EUI is measured in kilowatt-hours per square meter (kWh/m2). EUI is helpful for comparing energy performance between two buildings because it normalizes energy consumption across buildings of varying sizes. By comparing EUI, we can get a more accurate understanding of how energy-efficient a building is compared to another similar building.