Forum discussion
CS-2009 EAp2: Minimum Energy Performance
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 Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
May 23, 2014 - 1:09 pm
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
EcoConsulting872 thumbs up
May 23, 2014 - 1:19 pm
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 Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
May 27, 2014 - 12:13 pm
You are correct.
The 50 sounds like the electrical system capacity, not the lighting design value.