> For the complete documentation index, see [llms.txt](https://docs.ladybug.tools/hb-energy-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/hb-energy-primer/components/3_loads/infiltration.md).

# Infiltration

![](/files/-MihpfXF39rzJRWhXDLG)

![](/files/-MihpeMdC4BezjVjbQIt) - [\[source code\]](https://github.com/ladybug-tools/honeybee-grasshopper-energy/blob/master/honeybee_grasshopper_energy/src//HB%20Infiltration.py)

Create an Infiltration object that can be used to create a ProgramType or be assigned directly to a Room.

## Inputs

* **name**

  Text to set the name for the Infiltration and to be incorporated into a unique Infiltration identifier. If None, a unique name will be generated. 
* **flow\_per\_ext\_area \[Required]**

  A numerical value for the intensity of infiltration in m3/s per square meter of exterior surface area. Typical values for this property are as follows (note all values are at typical building pressures of \~4 Pa):

  * 0.0001 (m3/s per m2 facade) - Tight building
  * 0.0003 (m3/s per m2 facade) - Average building
  * 0.0006 (m3/s per m2 facade) - Leaky building
* **schedule**

  A fractional schedule for the infiltration over the course of the year. The fractional values will get multiplied by the flow\_per\_exterior\_area to yield a complete infiltration profile. 

## Outputs

* **infil**

  An Infiltration object that can be used to create a ProgramType or be assigned directly to a Room.