> For the complete documentation index, see [llms.txt](https://bombyx.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bombyx.gitbook.io/docs/components/0-database/5-energy-carrier.md).

# 5: Energy Carrier

This component calculates the environmental impact of the energy used in the building.

**INPUTS:**

The Energy Demand input can be a list or a single value.

The Energy Carrier input is based on a selection list that will be auto-generated once the Energy Demand has been connected.

**OUTPUTS:**

Energy properties (Text) provides the impact headers and values together for better readability, and Energy properties (Values) is the output that should be used through the workflow.