Bygningsreglementet (BR18)
The Bygningsreglementet (BR18) calculation is considered for all buildings that require a building permit to enable them to report their environmental impact over a 50-year lifespan. All new buildings with an area above 1000m2 must comply with a limit value of 12 kg CO2e/m2/year. A voluntary low-carbon class can also be achieved where the limit value is set as 8 kg CO2e/m2/year.
Life-Cycle & Results Scope
The BR18 tool reports impacts for A1-A3, B4, B6, C3, C4 and D stages.
Data Scope
The BR18 tool uses both CML (EN15804+A1) and PEF (EN15804+A2) data and only supports BR18 and Ökobaudat generic resources as per the standard.
Assessment Scope
For a full list, and further details please check with the Bygningsreglementet (BR18) guidance where an overview of the parts of the building that must be included appears in BR18, appendix 2, table 6 and can be downloaded here: Appendix 2, Table 6 - Building parts for calculating climate impact
Create a project and select the right calculation tool
Create a building project and select the 'LCA according to Bygningsreglementet' tool as the chosen calculation tool.
Create your first design and set up the LCA parameters
On project setup, please ensure Selecting Project Parameters.
- For the 'Service life values' choose 'Product-specific service life'.
- For the 'End of life calculation method' choose 'EPD-EOL Scenario, user adjustable', this opens the 'Country specific end of life scenarios', and you should set this to 'Denmark'.
Check the mandatory scope
The scope can be found above or in the guidance directly.
Input required material data (A1-A3)
Fill in your project information as per the scope detailed in the BR18 guidance by entering to the Build materials query design either manually or by importing your data (see different import options here; guidance for data import can be found here). If you need help finding the right datasets for your building materials, check our guidance pages here and here.
Generic BR18 data is available in the tool and can be found by applying 'BR18' as the data source in the material filters. The tool also includes standard value options under the 'HVAC components and equipment' category and includes options that can be input with the heated area as the quantity.
Mass data for the materials is automatically added to the detailed report.
Input annual energy consumption (B6)
Input energy as required by calculation scope for one year. This value will be multiplied by the calculation period for full-lifecycle results. The profiles that are available in the tool are provided by the Bygningsreglementet (BR18) guidance and represent different construction years/scenarios.
Fill in the calculation period
Set the calculation period to 50 years by opening the ‘Calculation Period’ and inputting 50 years.
Fill in the building area
Fill in the Building area question form by entering the appropriate areas. There are five different area definitions and each of these can be added with the relevant quantity depending on the area in question. The total reference area is based on the weighting of these areas. Further guidance on this can be found here: 1.3 Arealopgørelse
Results
The results are provided as Global Warming Potential (GWP) expressed as kg CO2e per m2 of heated floor area, per year. Full results can be found under the 'More actions' button by selecting 'Detailed report'.
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