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NC-2009 EAp2:Minimum Energy Performance

Including Mezzanines in the Energy Model

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Kellie Hollenbeck
Architect
Whitman Requardt & Associates
LEEDuser Basic Member
10 thumbs up

We are clear that for the total Gross Floor Area we have to include mezzanines. The project mezzanines are open to the floor below and are not used as occupiable space so; do they have to be included in the SF for the energy model? If we include them, we have to do a completely different model type. Has anyone excluded these spaces before or do they always have to be included?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 10/13/2011 - 16:31

If the space is conditioned it is supposed to count in the square footage.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 10/13/2011 - 16:43

So if the mezzanine is separately conditioned then it should probably count. If it is conditioned using the equipment from the space below then it would probably not be included.
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Maura Adams
Environmental Stewardship Manager
LEEDuser Basic Member
114 thumbs up

Wed, 11/23/2011 - 13:31

A similar question: We have two conditioned attic wings with catwalks. The floor area only includes the catwalks, but the entire space is conditioned. For energy model purposes the entire space needs to be included; for the rest of LEED calculations, I'd think that only floor area should be included. It's a difference of 11,000 square feet. Do you agree with my reasoning? How should I account for this discrepancy in online documentation?
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Emily Catacchio
Sustainability Specialist
Wight and Company
LEEDuser Basic Member
415 thumbs up

Thu, 11/24/2011 - 04:06

I believe the numbers for the energy model do not necessarily need to match other numbers in LEED. However you should inlclude an explaination if this is the case.

Mon, 11/28/2011 - 16:54

The credit documentation allows you to input both conditioned, and unconditioned space. Your energy model area should reflect the conditioned space. Unconditioned + conditioned should equal close to total building SF input elsewhere.

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