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NC-2009 EAp2:Minimum Energy Performance

Baseline Model Exterior Lighting

Profile picture for user Marais.Jean
Jean Marais
b.i.g. Bechtold DesignBuilder Expert
LEEDuser Basic Member
581 thumbs up

Okay, the baseline model has no overhangs and canopies, but the design has. As per my reviewer comments, I can't take credit for lighting parts of the baseline model (like the facade) if this lighting does not exist in the proposed case. But now it's the other way around...I have a canopy in the proposed design. Can I claim exterior lighting for canopies for the baseline model? In my case canopy lighting is the only exterior lighting. Surely the baseline model should then have exterior lighting consumer at 13.5 W/m² (4.2 Btu/h*ft²). What do you think?

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Mon, 10/31/2011 - 21:12

The canopy existing in the baseline - it just provides no shading. So, you don't model the shading effects of the canopy in the baseline, but you should model the lighting of the canopy.
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Jean Marais
b.i.g. Bechtold DesignBuilder Expert
LEEDuser Basic Member
581 thumbs up

Tue, 11/01/2011 - 06:00

Thanks Christopher. I guess I could even model the canopy but make it transparent, ha, ha...no i won't cause even more confusion. My proposed building has canopy lighting fixtures. I have divided the total connected power of these fixtures by the area under the canopy to get a W/m² number. This is what is lower than then the baseline number from table 9.4.5. Thanks again for your experience.

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