External Shading and Self-Shading

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Hello,
I have two questions.
1. If you have a building with other buildings modeled in close proximity, does equest take into account the shading from the surrounding buildings?
2. Are equest models self-shaded and if so can you turn this feature on/off?

Thanks in advance,
Luke Wilson

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Equest-users,

After playing around with my model for a while, I think I can answer my own questions.

1. You can model these surrounding buildings as "Building Shades" in detailed mode.
2. You can turn off/on whether an external surface is a "Shading Surface" in the spreadsheet view of Building Shell.

Thanks anyway,
Luke Wilson

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Luke,

1. Concur!

2. First - wow, I never noticed this input... but I'd like to
guess at your intent and have a 90.1 question. I flipped open my 90.1
2004 & 2007 to find the passage where it says "baseline models shall not
be self-shading..." and I can't seem to find it =/. TG3.1, section 5
for building envelope seems to only mention shading projections being
excluded in baseline models. That said, I'm certain I first picked up
the term "self-shading" somewhere within 90.1... am I incorrect in
thinking/hoping all baseline envelope constructions should have their
"Shading Surface" field set to "No?"

NICK CATON, E.I.T.

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Nick,
Thanks for your response.
If you look closely in Table G3.1, section 5 a. orientation for the Baseline Building Performance, it reads, "The building shall be modeled so that it does not shade itself".
Appendix G doesn't use the exact phrase "self-shading", but it's the same thing as far as I can tell.

Thanks,
Luke Wilson

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Nick,

ASHRAE Standard 90.1, 2004, Appendix G., p.172, "The [baseline] building
shall be modeled so that it does not shade itself." (P. 178 in
90.1-2007.)

Regards,

William Bishop, EIT, BEMP, LEED(r) AP

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Bill/Luke:

Thanks! I felt certain this was there but I guess my eyes were
selectively screening that line for some reason J.

NICK CATON, E.I.T.

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