Know-how
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Energiekennzahl (EKZ)


The Energiekennzahl (EKZ) describes the total energy demand or consumption of a building during one year in relation to the energy reference area. The calculation methodology is defined in the Swiss standard SIA 380:2021. The EKZ takes into account the energy demand for heating, cooling, ventilation, hot water, lighting, and other electrical devices and is expressed in kilowatt-hours per square meter per year (kWh/m²a).


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