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WWR measure creates windows that extend beyond surface boundaries

asked 2021-04-14 16:53:30 -0500

jbatt gravatar image

updated 2021-04-14 19:53:14 -0500

I am trying to run the "Resize existing windows to match a given WWR" measure to increase WWR from 25% to 40% and the measure runs without warnings; however, when I look at the model geometry (see attached image) it shows the windows now extending beyond the parent surface. Is there a way around this or is this issue inevitable if my original windows already take up the full length of the wall (i.e. does the measure only operate on the length of the window)?

Surprisingly, the simulation ran with no severe errors and yielded seemingly reasonable results. Though I did get the following warning for each window:

   ** Warning ** Base surface does not surround subsurface (CHKSBS), Overlap Status=Partial-Overlap
   **   ~~~   **   The base surround errors occurred 1 times.
   **   ~~~   ** Surface "SURFACE 15" overlaps SubSurface "SUB SURFACE 2"

Resize WWR 40% Measure

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Update: I was able to fix this going facade-by-facade using the "Set Window to Wall Ratio by Facade" measure. Would still be good to understand how to use the original measure though.

jbatt gravatar image jbatt  ( 2021-04-14 17:07:21 -0500 )edit

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answered 2021-04-14 23:54:39 -0500

I think this issue is specific to that specific measure: https://bcl.nrel.gov/node/83611

The OpenStudio Surface::setWindowToWallRatio method scales out to edge of the wall only (it leaves a 1" gap):

https://github.com/NREL/OpenStudio/bl...

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Asked: 2021-04-14 16:53:30 -0500

Seen: 138 times

Last updated: Apr 14