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Danish Building Regulations 2010, Executive order no 810 of 28 June 2010.

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The existing BR10 sets the minimum energy requirements for all types of new buildings. These requirements relate to the energy frame and the envelope of the building. In addition to the minimum requirements, BR10 also sets the requirements for two voluntary low-energy classes: Low-energy Class 2015 and Building Class 2020. These two classes are expected to be introduced as the minimum requirements by 2015 and 2020, respectively. The description of Building Class 2020 is defined in Executive order no. 909 of 18 August 2011.

The BR10 tightened the energy performance requirements for individual building components for all building types. This rule applies to the replacement or major renovation of the component. However, the measures must be economically feasible. This means that the annual savings multiplied by the expected lifetime of the measure divided by the investment should be higher than 1.33 or, put in another way, the measure must have a simple payback time of less than 75% of the expected lifetime of the measure. In case of full replacement of a component (e.g., a new roof, new window, new outer wall), the new component must meet the requirements set in the BR10, regardless of profitability.