Defining Plenum Spaces as rooms

[Andre Baros]

So I read the green paper on Revit/IES integration and it points out that you need to define all interior spaces as rooms, including plenum spaces, so that they are not computed as exterior.

Now I'm tagging a bunch of really short rooms, I have a 1 foot deep plenum.

I set a level at the top of the ceiling. Each area has walls which extent up to the roof, I have the roof on top. My cut plane is set at 6" up. My room bounding height is set to 1'. Revit says that the rooms are not properly bounded...

What am I missing???

[lev.lipkin]

If room computation height is set to 1' and a level is set at the top of the ceiling, with plenum height 1', I think that would get room computations at the roof above the plenum, did I miss something? Could you try to set room computation height at 6" and try again? If still not right, could you post model or send it to Support?

[ron.sanpedro]

If room computation height is set to 1' and a level is set at the top of the ceiling, with plenum height 1', I think that would get room computations at the floor above the plenum, did I miss something? Could you try to set room computation height at 6" and try again? If still not right, could you post model or send it to Support?

Lev,
we have been struggling with this as well, and my concern is a bunch of extra levels that can easily show up on sheets where you don't want them. My thought was to create a separate workset for the plenum rooms and associated worksets, and make it unloaded by default. Now your output looks good, and you can load the workset prior to exporting to IES. Sounds good in theory, but I wonder if there is something I am missing that will bite me. I hope to experiment with this next week, so finding out if this is a good tree to climb is rather timely.

Thanks!
Gordon

[lev.lipkin]

Gordon,
Thanks for feedback.
I wonder if you tried to use group with new link-bind abilities. Add levels and rooms as needed for analysis, group them. When you do not need them: "link" group and switch off visibility of the link file. When you need them again: bind the link.
Lev

[Andre Baros]

Thanks everyone,

I used room divider lines to narrow it down to the shape of the room. The first room I was trying to do was a "L" shaped plenum with very long legs. If I used a room divider line to shorten one leg it worked, but as I slipped the room divider line across it became invalid. Rectangular rooms worked just fine.

In this case, the building only has two floors so it's easy to manually deal with hiding the one extra level (no plenum on the other floor).