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Warning in OpenStudio [closed]

I have the following warning:

** Warning ** CalcSurfaceCentroid: 5 Surfaces have the Z coordinate < 0.
**   ~~~   ** ...in any calculations, Wind Speed will be 0.0 for these surfaces.
**   ~~~   ** ...in any calculations, Outside temperatures will be the outside temperature + 9.750E-003 for these surfaces.
**   ~~~   ** ...that is, these surfaces will have conditions as though at ground level.


What does this mean??

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Closed for the following reason the question is answered, right answer was accepted by dana94_08 close date 2016-06-17 18:03:29.722950

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This warning means the simulation has determined that five surfaces in your model have centroids that lie below the building ground plane (Z = 0), and is letting you know that the exterior heat transfer of those surfaces in the simulation will not be affected by wind speed, and the exterior surface temperature will be assumed to be at ground level (the 9.740E-003 is a factor that corrects for the height of the weather station above ground).

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And what I have to do to delete that warning?

( 2016-06-02 18:47:38 -0500 )edit

If those surfaces aren't supposed to be below ground, check to make sure the vertices are correct. If they are meant to be below ground, you should set the surface outside boundary condition to reflect that.

( 2016-06-02 21:31:17 -0500 )edit