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Embodied Carbon in MEP Systems

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.

A custom carbon intensity of MEP systems can be entered by passing a kgCO2e per area (sf or m2, depending on the unit system) value directly to the app. The area basis for this calculation is the total floor area multiplied by the percentage of conditioned floor area.

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.

A custom carbon intensity of PV Array can be entered by passing a kgCO2e per area (sf or m2, depending on the unit system) value directly to the app. The area basis for this calculation is the total panel area (i.e., not the total array area). The panel area is calculated as the array area divided by the ground coverage ratio.