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 this mean??