Room Seperator exported as exterior wall

hey,

I am working on a Revit project which has room separation to mimic an air wall instead of a physical wall. The hbjson export, has a material of exterior wall assigned to this ‘room seperator’ which impacts the daylighting simulations.

Is this an expected behaviour of the revit ‘room seperator’ or can it have an air wall material assigned during export?

Hi @ekta,

I assume you are using the Model Editor to clean up the model. My understanding is that we try to export them as airwalls whenever possible. I don’t know if this gets overwritten when one solves adjacency in the Model Editor. I have to look into this.

How do you run your daylight simulation? If you import the Model to Rhino, then you can easily make the change in Rhino.

Hey Mostapha,

I tried this also on a super simple model with just one interior room separator and got the same result.

We run the simulations via a python API we developed so we don’t have to go to Rhino.

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Hi @ekta, I’ll have a look and see if we can improve this. I remember it was challenging to assign Air Walls to room separators because in many cases, they are used right to the exterior walls to fix the gaps in the model.

That said, I understand why you would want these walls to be set to Air Walls.

A quick-ish way to address this is to add a command to the Model Editor to set the interior wall between selected rooms to air wall. The limitation is that we can’t limit this to a subset of the interior walls. It will affect all the interior walls between the rooms. Would that be an acceptable solution for this case?

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We started developing new workflows in Model Editor to allow changing the interior faces between the rooms to AirBoundaries. Chris will keep you posted.

I’m just making a note that I added the code that assigns air boundaries between a set of selected rooms. We will let you know, @ekta , once @antonellodinunzio gets the chance to expose this as a new Model Editor command and we make a new release.

To give you a sense of how the command will work, this is the description that I have drafted:

Set Air Boundaries

Set the adjacencies between the selected rooms to use air boundaries.

Note that adjacencies should be solved between rooms before running this method in order for it to have any effect. If lines are selected while running this command, they will be used to set air boundaries for only the adjacencies that are coincident with those lines.

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The new air boundaries command has been connected and it will be in the next release so I’m unassigning myself from this issue.

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