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NC-2009 EAp2:Minimum Energy Performance

stairs, electrical rooms modeled?

A couple of quick reference questions: 1) I have some miscellaneous areas in my project (stairwells, electrical rooms, elevator equipment room) being served by split system AC units and 4-pipe fan coils. Am I required to model these areas in proposed and baseline? 2) My proposed design is a two story building served by a rooftop air handler with VAV's. Do I model it as two seperate VAV systems (one per floor) in baseline, proposed, or both? As always, thanks for your help.

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Thu, 03/01/2012 - 13:02

1) yes 2) Proposed should represent actual design. Baseline depends on your base system - Systems 1-4 are modeled as one system per zone, Systems 5-8 are one per floor. Based on your description, you are probably System 3 or System 5. Check Table G3.1.1A in 90.1 Appendix G to be sure.
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Marcus Sheffer
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Thu, 03/01/2012 - 13:17

Regarding #1. The Baseline is always the same system for these areas as the main system selected from Table G3.1.1A unless one of the exceptions under G3.1.1 applies. If one of these exceptions apply then you can model a secondary system in the Baseline. The Proposed is almost always modeled as designed and built.

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