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

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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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Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

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NC-2009 EAp2:Minimum Energy Performance

90.1 Envelope Requirements

I'm trying to model a wood framed 4 story multifamily building, and the client wants to go without continuous insulation which is what's called for on table 5.5-4, resulting in a higher U value than the baseline. My question is can the whole building performance demonstrated in the model make up for the under performing envelope? And if so are there additional documents I have to submit to show compliance with 90.1 since the prescriptive compliance path wasn't chosen.

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Fri, 11/30/2012 - 16:51

If you are running an energy model, you can use the model to demostrate performance better than 90.1 baseline. For LEED, you'd just provide the typical model documentation, and indicate that you are following the modeling path. If you are following one of the prescriptive compliance paths (AEDG, Core Performance), you're stuck.

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