# Revit Built In Parameter for Air Terminal Room Calculation Point

**URL:** <https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387>\
**Category:** Uncategorized\
**Created:** [November 13, 2018, 3:05pm UTC](https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387 "2018-11-13T15:05:50Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![Paul.Storm](https://avatars.discourse-cdn.com/v4/letter/p/b2d939/32.png) [@Paul.Storm](https://forum.dynamobim.com/u/Paul.Storm)\
**Post date:** [November 13, 2018, 3:05pm UTC](https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387/1 "2018-11-13T15:05:50Z")

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I am trying return reads the Room Calculation point of an air duct from Python to Dynamo. How should I go about this?

 ![1](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/f/f/ff528281713430cd3e1e7782cb286f6915b9e88a.png)

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**Author:** ![Paul.Storm](https://avatars.discourse-cdn.com/v4/letter/p/b2d939/32.png) [@Paul.Storm](https://forum.dynamobim.com/u/Paul.Storm)\
**Post date:** [November 14, 2018, 9:13am UTC](https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387/3 "2018-11-14T09:13:15Z")

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Hi Mark,

I want to create a temporary tiny sphere at the location of the room calculation point. I can then determine whether this is in the geometry of a room in a linked file. Do you perhaps know of a different way to schedule components as per a linked file’s rooms?

Kind Regards,

Paul

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**Author:** ![Mark.Ackerley](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/mark.ackerley/32/79310_2.png) [@Mark.Ackerley](https://forum.dynamobim.com/u/Mark.Ackerley)\
**Post date:** [November 14, 2018, 9:23am UTC](https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387/4 "2018-11-14T09:23:04Z")

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Hi Paul,

That is a nice idea, I always like to use a geometric method for checking, perhaps this works for you? There is both a Position and a MarkerPosition property you could try…

[http://www.revitapidocs.com/2018/8fdda4ea-f98b-dfe9-a54d-e1927cc88651.htm](http://www.revitapidocs.com/2018/8fdda4ea-f98b-dfe9-a54d-e1927cc88651.htm)

Hopefully that helps,

Mark

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<div class="post-metadata">

**Author:** ![Paul.Storm](https://avatars.discourse-cdn.com/v4/letter/p/b2d939/32.png) [@Paul.Storm](https://forum.dynamobim.com/u/Paul.Storm)\
**Post date:** [November 14, 2018, 9:53am UTC](https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387/5 "2018-11-14T09:53:04Z")

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Hi Mark,

Thank you for the advice. Its sounds like these may just be the solution. I will test and report the result.

Kind Regards,

Paul

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**Author:** ![candok4545](https://avatars.discourse-cdn.com/v4/letter/c/aeb1de/32.png) [@candok4545](https://forum.dynamobim.com/u/candok4545)\
**Post date:** [April 1, 2023, 4:15am UTC](https://forum.dynamobim.com/t/revit-built-in-parameter-for-air-terminal-room-calculation-point/28387/6 "2023-04-01T04:15:39Z")

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Hello Paul ,what you tried might work for me in what i do for air terminals. Did you find a solution? If so, can you share it?