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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Separating Pantry Zone

Omar Elrawy

Green Building Consultant | Researcher

GreenA Consultants

LEEDuser Basic Member

38 thumbs up

Project location :

December 3, 2014

Dear all, I have a case where I need to know if I should model separate Pantry zone in Both Basecase and Proposed Case, or in Basecase only? I have an office building with one System 8 per floor in Basecase. and one AHU with multiple VAVs in proposed case. Each floor has one FCU for its pantry zone in the proposed case. I need to know if I have to model this pantry separately in the proposed case only, in both proposed case and basecase (with a system 4 in Basecase), or I can neglect this zone and assume it follows the rest of the floor as it is only? Another question is: on the basement floor I have 4 zones (entrance lobby, driver room, UPS room, and Prayer room) each is served by one FCU in the proposed case. Can I gather these four spaces as one (System 4) in Basecase, and one FCU in the proposed case? or they should be separated into 4 zones (thermal blocks)? Thanks

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 12/03/2014 - 16:26

The proposed is modeled as designed. The baseline per Appendix G. You should only model a separate zone for the pantry if one of the exceptions to G3.1.1 applies. The rules for creating thermal blocks are spelled out in Table G3.1-7. Based on your descriptions it does not sound like you can consolidate those zones. If your building is a system 8 then the basement floor should also be a system 8 unless one of the exceptions to G3.1.1 applies.

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