doelUwaarde

DoelUwaarde is a term used in Dutch building and energy planning to denote the target U-value for a building element. The U-value, expressed in W/m2K, represents the rate of heat transfer per square meter per degree of temperature difference; lower values indicate better insulation. The doelUwaarde specifies the maximum U-value that a component (such as a wall, roof, floor, or window) is intended to achieve in a given project or by regulation. It functions as a design target used during energy calculations to ensure compliance with energy performance requirements, such as EPC or BENG in the Netherlands.

The target is set by national building regulations or project-specific agreements and depends on factors like climate zone, building type, and the desired energy performance level. Designers calculate the U-values of proposed assemblies using standard methods and compare them with the doelUwaarde; if necessary, they adjust thickness, materials, or construct details to reduce heat loss. The doelUwaarde is one component of the overall energy performance; other factors such as airtightness, thermal bridges, ventilation, and solar gains also influence actual performance.

In practice, the term is common in Dutch planning contexts and may have equivalents in other regulatory regimes, though the exact definition and calculation standards can vary by jurisdiction.