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NC-2009 EAp2:Minimum Energy Performance

Unconditoned Spaces

There are several unconditioned spaces in a project that I'm working on. For Energy simulation, should those spaces be modeled as having cooling & heating systems? Or can I leave the spaces as unconditioned in the energy simulation?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
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Wed, 03/20/2013 - 18:38

They should be modeled as fully occupied and conditioned. If a design has not been completed model the spaces identical to the Baseline. If the space type is unknown model it as office space.

Wed, 03/20/2013 - 18:47

These areas are storage spaces and will never be conditioned. So why should these spaces be modeled as conditioned spaces in energy model? please explain. thanks.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Wed, 03/20/2013 - 19:08

I could not tell from you original question the nature of the unconditioned spaces. If they are purposefully designed unconditioned spaces then you do not need heating or cooling modeled.

Wed, 03/20/2013 - 19:16

Hi Marcus, sorry for not being specific in my first comment. So, do you mean to say that, any space that are purposefully designed to be unconditioned need not to be modeled as having cooling & heating? Further, for my information, kindly explained what kind of unconditioned spaces should be modeled as having cooling & heating as you have advised in your first comments. thanks.
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Marcus Sheffer
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7group / Energy Opportunities
LEEDuser Expert
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Wed, 03/20/2013 - 19:27

Correct. If it is unconditioned it would not have heating or cooling. If it has one or the other then you are supposed to add the missing system but there are ways around that requirement. I was originally thinking of a temporarily unconditioned space, like a future tenant space or an unfinished floor.

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