Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

How to assign a wall as an internal wall

asked 2017-04-20 07:32:12 -0500

Samiul's avatar

updated 2017-04-20 08:33:17 -0500

I have a simple rectangular room. I want it's south and east walls to be designated as internal wall, e. g, no exposure to outside. If rendered by boundary condition, they should look green I guess. Please help me do it. thanks

edit retag flag offensive close merge delete

2 Answers

Sort by ยป oldest newest most voted

answered 2017-04-20 09:20:52 -0500

Adam Hilton's avatar

If you're just modeling one space that's part of a larger building you should assign the walls that contact another space in reality to Adiabatic. An Interior boundary condition also requires the input of the surface of another space.

edit flag offensive delete link more


Hi Adam, Sounds perfect, can you please guide me how to assign a wall Adiabetic in OpenStudio?

Samiul's avatar Samiul  ( 2017-04-22 14:07:56 -0500 )edit


  1. Select the surface you want to make Adiabatic in SketchUp
  2. Go to 'Show Object Info Window'
  3. In 'Object Info' -- go to 'Outside Boundary dropdown menu --- change to Adiabatic

Hope this helps!

The Architecture Gazette's avatar The Architecture Gazette  ( 2018-03-26 06:10:49 -0500 )edit

answered 2017-04-20 09:19:56 -0500

Tim Johnson's avatar

If it is a small number of surfaces, you can pick the shared surface from the adjacent space in the "Outside Boundary Condition Object" in the OpenStudio Inspector tool. That will change the outside boundary condition from outdoors to surface.

edit flag offensive delete link more


Sounds good, I'll try it. Does it effectively assign the wall as adiabetic?

Samiul's avatar Samiul  ( 2017-04-22 14:32:13 -0500 )edit

If you use the surface matching tool or pick the shared surface as I described, E+ will allow heat to transfer between zones. If you really want these walls to be adiabatic, you can choose the adiabatic construction in the OpenStudio Sketchup plugin. Be aware that there is no default adiabatic construction in OpenStudio, so you will need to define a construction type. I recommend matching surfaces and not using adiabatic walls between every space, but the adiabatic option may speed up your run times.

Tim Johnson's avatar Tim Johnson  ( 2017-04-24 09:27:18 -0500 )edit

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Training Workshops

Question Tools


Asked: 2017-04-20 07:32:12 -0500

Seen: 632 times

Last updated: Apr 20 '17