I am working on a CBECC-Com 2013-3e model review. Exterior shading surfaces were created by right-clicking on a zone, and selecting "create" -> "external shading object". The shades then show up as blue icons beneath that zone:
The odd thing is that I noticed that when I move these shades to a different space- the actual spaces they are shading- the results of the simulation changed. This seems odd to me since these are coordinate-based shading surfaces, so theoretically it shouldn't matter where they are in the model.
Next I also tried adding shades on the windows themselves using the "define window shades" option:
This also yielded very different results. Though when I look into OpenStudio or the .idf file, both of the above options for creating shades is creating a "shading:zone:detailed" object. I thought maybe the first option above was using a "shading:site" or "shading:building" object.
Has anyone seen this before or does anyone have theories or ideas for the discrepancies?
