# Fourth Generation Thermal Loop

![](https://3405893330-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Ma9gBkJelXEQ5LsYEl7%2Fuploads%2Fgit-blob-cee9912ec936df69e906985d45dd563f972bb1eb%2FFourth_Generation_Thermal_Loop.png?alt=media)

![](https://3405893330-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-Ma9gBkJelXEQ5LsYEl7%2Fuploads%2Fgit-blob-72c333cc3874c19c9568cb7a47937e99944fe254%2FFourth_Generation_Thermal_Loop.png?alt=media) - [\[source code\]](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.