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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?

Do I need to justify the electrical and fuel rates I am using in my model?

Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

Can I claim exterior lighting savings for canopy lighting even though a baseline model cannot include shading elements?

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The Section 9 space-by-space method does not include residential space types. What should I use?

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A portion of our building envelope is historic. Can we exclude it from our model?

Which baseline HVAC system do I use if my building has no heating or air conditioning?

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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

Tenant spaces

I am working on CS project..i have small doubt If tenant spaces (HVAC, LIGHTING etc) comes under owner/developer scope of work, those spaces should be model as per ASHRAE (in baseline). right??

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

Thu, 01/17/2013 - 14:44

Everything gets modeled according to ASHRAE. The Baseline according to Appendix G and the Proposed as designed. For CS projects also apply the Reference Guide appendix for modelling CS projects. If the space has been designed then model that in the Proposed, if any space has not been designed model identical to the Baseline.
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Anil Bhari
Min engineering inc
LEEDuser Basic Member
2 thumbs up

Tue, 05/21/2013 - 15:05

Marcus, HVAC system has not been designed for space. but tenant have to meet at least local code, which is IECC-2012. so in this case can we model proposed case based upon IECC-2012 (for cooling and heating efficiency, Lighting) or we have to model identical to baseline. Thank you
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Tue, 05/21/2013 - 15:45

You could try and make the case that the tenant has to follow code and claim savings relative to the ASHRAE baseline. Only issue I can think of - if the system has not been designed then how will you know what system to model in the Proposed. If you can address that you could probably make the case. Make sure to thoroughly explain this to the reviewer and you should probably do it as an exceptional calculation.

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