> For the complete documentation index, see [llms.txt](https://docs.pollination.solutions/user-manual/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pollination.solutions/user-manual/model-editor/commands/alphabetically/me_split_core_and_perimeter.md).

# Split core and perimeter

<img src="/files/kUv40Ew1ntQzC8AmOwtp" alt="" height="50" width="50">

Create core and perimeter rooms for a selected room. This is particularly useful for creating models according to typical zoning practices, where each façade orientation is a separate zone.

## Options

* **Offset Distance**

  The distance that the perimeter of the rooms will be offset
* **Air Boundary**

  Select to have the new separation walls between the core and perimeter rooms set to Air Boundary