> 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/6_alternativeweather/horizontal_infrared.md).

# Horizontal Infrared

![](/files/-MihrbC_xxk_rmVq45gr)

![](/files/-MihraPo6eJWGgKHDhnj) - [\[source code\]](https://github.com/ladybug-tools/dragonfly-grasshopper/blob/master/dragonfly_grasshopper/src//DF%20Horizontal%20Infrared.py)

Calculate downwelling horizontal infrared radiation intensity from sky cover, dry bulb temperature, and dew point temperature.

## Inputs

* **sky\_cover \[Required]**

  A value or data collection representing sky cover \[tenths] 
* **dry\_bulb \[Required]**

  A value or data collection representing  dry bulb temperature \[C] 
* **dew\_point \[Required]**

  A value or data collection representing dew point temperature \[C] 

## Outputs

* **horiz\_infrared**

  A data collection or value indicating the downwelling horizontal infrared radiation \[W/m2]