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CS-v4 EAp2:Minimum energy performance

Tenant lighting savings without layout

Dear Everyone,

Generaly for CS project we model tenant spaces as unfinnished and we use perimeter/core zonning method.

We are in the middle of creating one project where tenant lighting has been already completely designed and it is final design. 

My question is if it is acceptable to use Building Area Method and calculate Proposed value LPD based on obtained project even if whole tenant area has been previously created without layout in Energy Model.

The second option is creating layout in software, but in Carrier HAP it means creating model alomst from the begining. We want to avoid unnessesary work. 

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

Thu, 03/28/2019 - 17:15

Here is a case where you would need to use the same method to determine the lighting savings. If you are using BAM for the rest of the building, yes you can use BAM for this tenant space to show savings for a completed lighting design. 

Fri, 03/29/2019 - 07:39

Thanks Marcus, what about using SbS method for that case? Would be acceptable to calculate average LPD for each tenant and apply for our perimeter/core zones created per G3.1.8 and use open office LPD for Baseline Case?

Fri, 03/29/2019 - 08:37

In such case for Core and Shell building, we forced on the Architect and the MEP designer to prepare a sample fit-out for the spaces, so that we can use it as a reference for the SbS method. Then we want to prepare a Tenant Sales and Lease Agreement which will oblige all the tenants to have a max LPD of i.e. 6W/m2 + daylight controlled luminaries. Having that, we want to take credit for lighting savings coming from lower LPD and daylight controls. I understand that this could be the right way for using SbS for core and shell and justifying the savings?  
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 03/29/2019 - 12:51

Yes you could use SbS. The other thing you will need, in addition to the final lighting design, is a final space layout plan. You must have both to claim savings.

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