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NC-2009 EAp2: Minimum Energy Performance

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Baseline External Lighting Calc

December 19, 2013

Jean Marais

b.i.g. Bechtold DesignBuilder Expert

LEEDuser Basic Member

832 thumbs up

December 19, 2013

I'm using Revised Section 1.4 Tables (October 2012). I notice for Nontradable Surfaces "Total allowance calculated using the lesser of the design lighting power, or the lighting power allowance used, since no credit is permitted for nontradable surfaces", but I can't find where ASHRAE 90.1 -2007 states this. Can you help? It makes about a massive difference to my facade allowance (2470 W down to 768 W)

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Marcus Sheffer

LEED Fellow
7group / Energy Opportunities

LEEDuser Expert

5909 thumbs up

December 20, 2013 - 9:45 am

It is a LEED rule not a 90.1 rule. The logic has to do with the fact that it is not tradeable.

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