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CI-2009 EAc1.3:Optimize Energy Performance—HVAC

EAc1.3 Option 2: Baseline vs Alternate Baseline

I am working on a small building that is pursuing LEED CI. The building is comprised of two tenant spaces, office and restaurant/dining. The office space (pursuing LEED CI) is completely finished and occupied while the restaurant/dining is unfinished shell space. The restaurant/dining area does include Base Building HVAC equipment, plumbing and lighting for permit. I would like to model the building using the Option 2 Baseline method. However, since the restaurant/dining is unfinished I am unsure how to model this space for lighting. Can I assume ASHRAE 90.1 values per Section 11 or should I use the Base Building lighting power densities which only include emergency lighting? Your feedback is welcome.

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 09/10/2014 - 12:31

You model it the same as the Baseline allowance.

Wed, 09/10/2014 - 13:07

Marcus, thank you for your response. Now that I read my question, I'm not sure I was clear in which space I had the question. It is the restaurant/dining space that I was unsure of. If I use Base Building (Core and Shell) lighting it will only include emergency lighting as the space is not built out. The other option, which I used in the LEED submission is to use the "not to exceed" LPD value listed in the Tenant Lease Agreement. Thanks again.
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Wed, 09/10/2014 - 13:26

Perhaps it was my answer which was not clear. Baseline means according to Appendix G/Section 11. If you have a lighting design or a not to exceed LPD in the lease agreement then you can use those values to claim savings. However, for this credit under Option 2 I think you are supposed to hold all of the non-HVAC modeling inputs neutral (i.e. the same) to determine the HVAC percentage only. The procedure is in the Reference Guide.

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