Other Building Assemblies

Embodied Carbon in Building Assembles

Building assemblies in C.Scale are evaluated on a per-area basis. When specific data is not known, the API includes EPIC's pre-defined carbon intensities, defined by the levels of ambition:

  • Conservative represents the 80th percentile of material or assembly carbon intensities.

  • Best Practices represents the 50th percentile of material or assembly carbon intensities.

  • Low Carbon represents the 20th percentile of material or assembly carbon intensities.

For each assembly, the carbon intensity is determined by sampling the distribution of GWP values from typical assemblies at the 20th, 50th, and 80th percentile.

For all asemblies, custom data can be entered by declaring a carbon intensity value.

Embodied Carbon in Interior Fit Out

Interior fit out is calculated on a per area basis for a proportion of the building's total area. Note that the dataset used to generate the quantities used in C.Scale is not sensitive to use type and is biased toward commercial interiors. These data include internal EHDD data and data from the CLF study on tenant fit outs in commercial office buildings.

Custom fit out data can be entered with a

Embodied Carbon in MEP

Embodied carbon in mechanical systems in evaluated at two specification levels—standard performance and high performance—and is dependent of the total square footage of the building. This approach, and the data used in C.Scale, follow from the CLF study on building mechanical systems.

Embodied Carbon in Solar Photovoltaic Arrays

Embodied carbon in solar photovoltaics arrays is calculated using values from the peer-reviewed literature. A citation to the current data source is available in in the Reference Data Sources section of this guide.

Embodied Carbon in Hardscape

All site area not designated as planted is assumed to be hardscaped. Hardscape emissions were calculated by EHDD using a parameterized streamlined LCA model of built from standard hardscape details. The 20th, 50th, and 80th percentile of the resulting distribution was sampled and used to define the specification levels in C.Scale.

Emissions from Landscape Maintenance

Emissions from landscape maintenance is calculated per planted area using values from the literature. A citation to the current data source is available in in the Reference Data Sources section of this guide.

Example Data

For reference, below is a tabular summary of some of the data used in the US. Additional data (across all supported regions) is available via API.

AssemblyLow CarbonBest PracticesConservative

Cladding

3.0 kgCO2e/sf

8.8 kgCO2e/sf

14.3 kgCO2e/sf

Glazing

11.4 kgCO2e/sf

13.6 kgCO2e/sf

19.0 kgCO2e/sf

Roofing

5.3 kgCO2e/sf

7.7 kgCO2e/sf

14.0 kgCO2e/sf

Tenant Fit Out

4.0 kgCO2e/sf

7.6 kgCO2e/sf

13.3 kgCO2e/sf

Hardscape

4.4 kgCO2e/sf

5.9 kgCO2e/sf

7.2 kgCO2e/sf

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