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Our project has a large process load—75%. Despite our efforts to make an efficient HVAC design, the cost savings are minimal. What can we do to earn this prerequisite and be eligible for LEED certification? Is there any flexibility in how we model the p

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Our process load is higher than 25%. Do we have to justify that?

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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

Tenant lighting exceeds ASHRAE, how to model?

Hello all, In LEED - CS office projects, since the tenant fitout is unknown, LPD is modeled 12 W/m2 according ASHRAE. However, in the country we are working, national standart for LPD is 20 W/m2. So, all the cooling equipment is designed according 20 W/m2. So, am I allowed to take baseline LPD 20 W/m2 according national standarts? Otherwise I will loose points because of tenant design and it doesn't fit the logic of LEED-CS. Do you have any suggestions? Thank you ver much!

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

Mon, 11/05/2012 - 17:32

No you must use 12 in both models. You will not lose points relative to the lighting since the baseline and proposed will be identical. Sounds like you will have an over-sized HVAC in the proposed relative to the baseline but it is hard to say how much, if any, your modeling results will be affected.

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