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Do the required savings for this prerequisite (and credit) need to come only from building energy, or also process loads?

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NC-v4 EAp2:Minimum energy performance

Leed v4- NC of Logistic Center.

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Helena Garcia
Sustainability consultant
PGI ENGINEERING
LEEDuser Basic Member
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It is making energy simulation for a logistic center for storage. Local regulations based on European regulations not required to be heated, instead ASHRAE required to be heated. How should we consider it? (Heated, semi-heated or unheated)

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Wed, 05/25/2016 - 13:29

Is the entire building unconditioned? If only a portion of the building is unconditioned you can treat that portion as unconditioned. Any ventilation in the unconditioned space is then modeled identically as a process load.
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Helena Garcia
Sustainability consultant
PGI ENGINEERING
LEEDuser Basic Member
5 thumbs up

Fri, 05/27/2016 - 07:12

The building has two parts. The offices which are conditioned and the storage area which is unconditioned.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Fri, 05/27/2016 - 12:21

Simply model the unconditioned spaces as I had indicated above.

Mon, 05/30/2016 - 10:06

Hi Marcus, If we have a big difference beetween the unconditioned/conditioned area as 46.000m² of unconditioned and unventilated warehouse plus 1.600m² of offices, is the same procedure? Only simulate as conditioned the office?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 05/31/2016 - 15:30

Yes and yes.

Tue, 05/31/2016 - 15:57

Ok perfect. My doubts had come because in ASHRAE 90.1:2010 in section 5.1.2.4 say that in climate zone 3 through 8 a space may be designated as either semiheated or unconditioned only if approved by building official. Now I do this interpretation: it's talking about a conditioned (heating) space, with less than 3.4 Btu/h ft2, is a unconditioned. No, about unconditioned spaces. On the other hand, what means a building official approval in a LEED project?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 05/31/2016 - 17:08

For LEED you must meet the mandatory provision in every Section X.4. Beyond that LEED would not really care if you had building official approval for this specific item as it is not a mandatory provision. Whether a space is unconditioned would strictly be based on having no HVAC system installed in the proposed design in that space.

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