[BLDG-SIM] Exterior Ltg & LEED EA Credit 1

[Brahme, Rohini UTRC]

Also, the LEED reference manual calculations for baseline and design show that the exterior lighting consumption is different in the two cases with it being lower in the design case.
- Rohini

________________________________

From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Fred Porter
Sent: Friday, September 28, 2007 11:22 AM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] Exterior Ltg & LEED EA Credit 1



I'm confused as to whether any exterior lighting power can differ between the proposed & baseline models. Any one have any experience from EA Cr1 submissions? 

  

The Users Manual for App G states at the end of the "Baseline Lighting" Section, ".... credit may be taken for improvements in exterior lighting efficacy or wattage... the proposed building can take credit for a more efficient system." So proposed parking lot lighting at 0.08 W/sf or whatever would be compared to a baseline of parking lot lighting at 0.15 W/sf. I believe façade lighting must be the same in both, as these are "non-tradable surfaces" in Chapter Six. 

  

But an apparently poorly-considered Credit Ruling from 4/25/07 simply states "No. Appendix G does not allow trade-offs for exterior lighting," directly contradicting the UM. 

  

Perhaps a post like this should be on the USGBC "engineers" "member-to-member" forum, but I don't see much traffic there. 

  

-- 

Fred W. Porter, B.S., LEED A.P.
Senior Engineer
Architectural Energy Corp., Boulder CO 

  

  


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