Entity Tagging in SketchUp

Sefaira makes an assumption about each plane within the SketchUp model and automatically assigns an Entity Type (e.g. Floor, Wall, Roof etc.)

It is important to periodically check the Entity Types while designing, and before uploading the model to the Web Application.  

We've recently changed the way users can show, change, and isolate entity types. New and experienced users, please take note:

Showing Entity Types

The entity assignments can be displayed by first activating the Entity Palette and then clicking the Show Entity Types button at the bottom right corner of the plugin.

When the Entity Palette is deactivated, entity tags will not appear:

Changing Entity Types

In order to edit a SketchUp plane’s entity type, you can simply right-click on the plane, navigate to “Sefaira Plugin” and select the desired “Tag as…” option from the list:

Correcting Normals

Sefaira assumes an inside face and an outside face to each plane.  This governs the path of heat flow and orientation of the plane on a per facade basis. Red planes should be facing inwards towards the building interior.  In the below image, a few planes are facing the wrong direction.  Select the red planes, right click, and select 'Reverse Faces' to properly orient the planes.

Isolating Entity Types

In the Entity Palette, click the bullet point to the left of the entity or entities you would like to isolate.  Unclick the bullet in order to show all entities. You can isolate more than one entity type at a time.

Entity Types

  • Walls - All planes tagged as 'Wall' experience thermal transfer with the outdoor environment. 
    NOTE: Internal walls should be tagged as 'Internal Wall'.  The 'Wall' type is for exterior wall planes.
  • Roofs - Planes tagged as 'Roof' experience thermal transfer with the outdoor environment. 
  • Floor - Only the ground floor at Z=0 and any floors between Z = -1m (3.3 ft) and Z = 1m (3.3 ft) are analyzed for thermal transfer to the ground. (Internal floors are not analyzed for thermal heat transfer to the outdoors.) All floors add to the total square footage of a building. 
  • Glazing - Exterior planes tagged as 'Glazing' experience thermal transfer with the outdoor environment and solar heat gains.
  • Shading - Planes tagged as 'Shading' experience no heat transfer. They are analyzed for shading properties only. 
    NOTE: All contextual massing surrounding the central building should be tagged as shading.  For more information on capturing context, visit our article on the subject (here). 
  • Internal Wall - Planes tagged as 'Internal Wall' do not experience heat transfer with the outer environment.  They are analyzed for internal daylighting impacts.   Click here for more information.
  • Internal Glazing - Planes tagged as 'Internal Glazing' do not experience heat transfer with the outer environment.  They are analyzed for internal daylighting impacts. Click here for more information.
  • Ignore - Planes tagged as 'Ignore' are not analyzed by Sefaira and will not appear when uploading to the Web Application.

For further questions, contact our support team at support@sefaira.com or post a question in our Community section.

 

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Comments

  • Avatar
    Simon Schneider

    regarding floors: is the ground floor supposed to face "outwards" -meaning down. or should it be oriented up like all other floors?

  • Avatar
    Simon Schneider

    Is "Party wall" a new feature? it is missing in my context menu for surfaces

  • Avatar
    Alyson Hallander

    Hi Simon, The red face of the ground floor should be facing towards the interior of the building.

    Party wall was taken out of the entity palette because it is essentially the same thing as an internal wall. I apologize for the confusion with that image.

  • Avatar
    Michael Lehmberg

    Hi Alyson,
    I'm curious why there is no tagging for exterior doors, since they would treat energy transfer differently than glazing or walls. How are they normally tagged?

  • Avatar
    Alyson Hallander

    Hi Michael,
    For the purposes of early concept/schematic design analysis, door details are not needed and should not be modeled. If you have a glass door, tag it as glazing. If it's an opaque door, keep it as a wall.