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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

Extra Lighting Allowance for Tenanted Areas

Maya Karkour

EcoConsulting

LEEDuser Basic Member

549 thumbs up

May 22, 2014

Dear All, I am modeling a retail C&S shopping mall, whereby the developer wants to give a lighting power allowance provision of 50 W/m2 for the retails shops. No lighting fixtures will be installed since these areas are tenanted. For the Energy model, I'm assuming I have to model 18 W/m2 for lighting power densities (space-by-space for retail sales). This 18 W/m2 will be the same for the baseline and the proposed scenarios. Can you please confirm?

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Fri, 05/23/2014 - 17:09

You are correct. You can only claim savings if there is a requirement in the tenant lease to install a lower than allowed LPD.

Maya Karkour

EcoConsulting

LEEDuser Basic Member

549 thumbs up

Fri, 05/23/2014 - 17:19

Thanks Marcus, My main question is: there is no scenario whereby i have to model 50W/sq.m for Retail LPD, UNLESS the owner is specifying AND installing 50W/sq.m (which is not really my case, as the owner is providing a PROVISION only)?

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 05/27/2014 - 16:13

You are correct. The 50 sounds like the electrical system capacity, not the lighting design value.

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