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CI-v4 EAc2:Optimize energy performance

Modeling Exterior Envelope and Construction

Hi, 

 

I am trying to model 10th floor in a 13 floor building, My question is should I make floor and roof as a void where there is no heat transfer between roof and floors, also for baseline constructions how should I select the walls lets say that in the proposed model wall is metal building should i model the baseline envelope as metal wall?

 

Thanks in advance!

 

Rajat

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

Tue, 03/28/2023 - 21:31

It depends on the expected use of the 9th and 11th floors. If the expected use is the same then yes, if not then no. You model the proposed wall as designed. You don't model any particular type of wall construction for the baseline, you model the prescriptive U-value required.

Tue, 03/28/2023 - 21:48

Thanks Marcus for the reply, When you say prescriptive there are 4 different walls, Mass , Metal, steel building and wood, which one should we model? Proposed is Mass so baseline should also be Mass?   Thanks!   Rajat
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 03/28/2023 - 22:12

No. Table G3.1 - 5. Baseline (b.) indicates that the baseline walls are supposed to be steel framed.

Wed, 03/29/2023 - 14:42

Marcus, I missed that. Thanks for clarifying.   Rajat

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