> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/dragonfly-primer/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ladybug.tools/dragonfly-primer/components/5_districtthermal/fourth_generation_thermal_loop.md).

# Fourth Generation Thermal Loop

![](/files/melHN4MeSPbYnSHqJAql)

![](/files/AwREptkC3wlChkXmjold) - [\[source code\]](https://github.com/ladybug-tools/dragonfly-grasshopper/blob/master/dragonfly_grasshopper/src//DF%20Fourth%20Generation%20Thermal%20Loop.py)

Create an Fourth Generation Loop for a District Energy Simulation (DES) simulation.

This includes a central hot and chilled water plant for the district.

### Inputs

* **chilled\_temp**

A number for the temperature of chilled water in the DES in degrees Celsius. (Default: 6).

* **hot\_temp**

A number for the temperature of hot water in the DES in degrees Celsius. (Default: 54).

* **name**

Text to be used for the name and identifier of the Thermal Loop. If no name is provided, it will be "unnamed".

### Outputs

* **report**

Reports, errors, warnings, etc.

* **des\_loop**

A Dragonfly Thermal Loop object possessing all infrastructure for a District Energy Simulation (DES) simulation. This should be connected to the loop\_ input of the "DF Model to GeoJSON" component.


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