Surface normal for Glazing windows

what direction the surface normal to be for a glazed window? wtr it is towards outside of building or inward?

it should be the same on all windows

thank you for your info. I’m taking the Rhino model to DIVA for daylight simulation. in this case, glazing surface normal to be inward or outwards?

Sorry not familiar with DIVA, i was under the impression you were drawing something.

Thank you.
we do create architectural 3D model using RHINO and perform daylight simulation using DIVA plugin for Rhino.

If I remember correctly, outwards .
Can’t you notice it by the values?

I’d make a simplified file both ways, try, and see which works correctly.