# Services ### 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](/the-c.scale-tm-data-model/reference-data.md) 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. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.cscale.io/the-c.scale-tm-data-model/whole-life-carbon/services.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.