Forum discussion
NC-2009 EAp2: Minimum Energy Performance
We have a project that specified exterior lgithing for 1120 W. Based on IECC, we could claim supplemental allowance of 1300 W regardless o the exterior area. However, 90.1 does not indicated it, could we still use it in EAp2? I think SSc8 allows it but EAp2 or 90.1 does not make it very clear...
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
March 11, 2015 - 12:07 pm
Both SSc8 and EAp2 are based on 90.1. You can't use IECC.
The newer versions of the SSC8 form use 90.1-2010 values since this version aligns better with the light pollution zones. Under this method there is a supplemental base allowance.
For EAp2 you can use the 90.1-2007 methodology which will normally show more energy savings. You can also use the 90.1-2010 method since it produces a conservative result.
The methodology used does not have to be consistent for these credits.