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

EAc1.3 Simulation for LEED CI

HELLO. We have a project that will be applying for LEED certification under CI for Retail. This project is supermarket within a mall, the retail space is rented. We have the following doubts for EA c1.3 using the second option ASHRAE APENDIX 11: - is it necesary to simulate the whole mall, or jus the retail space that is under certification, in this case the supermarket. - The Supermarket HVAC system consists in AHU, and these AHU are supplied with cold water that comes from the HVAC central of the mall. For the proposed supermarket case, is it necesary to simulate the mall thermal central? or how do you suggest we should indicate the cold water that comes from the mall AHU?

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

Tue, 04/30/2013 - 14:00

We ran into this situation on a mall project as well. Technically the published information indicates that you have to model the whole mall. I think this is completely impractical and virtually impossible to do at any kind of reasonable cost. What makes sense is to model the chilled water as purchased energy or down-size the central plant and create a virtual plant using the same efficiencies and losses from the actual plant like option 2 in the DES. Which one makes the most sense depends on if the chilled water is provided as part of the lease cost or if it is metered and billed separately. We ended up recommending to our client that they submit a LEED Interpretation but we did not hear if they actually did or not.

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