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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Baseline System Selection - larger heated space - smaller cooled

Don Carsto

Senior Mechanical Engineer

exp Federal

LEEDuser Basic Member

0 thumbs up

December 11, 2012

Our case involves 16,000 sqft of cooled and heated space and 90,000 sqft of heated-only space. The two spaces happen to be separated by a 4-hour fire wall. Our inclination is for the baseline to be System 3 for the cooled and heated space. But we cannot find justification why the choice shouldn't be System 5, based on the definition of a conditioned space being cooled and/or heated. Thank you for your attention.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 12/11/2012 - 14:46

The predominant condition is the heated only space so I would use a system 9 or 10 from 90.1-2010 (this has been allowed for LEED projects). I would then use a system 3 or 4 for the fully conditioned space based on G3.1.1 exception b (assuming it can be applied).

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