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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

Can SHGC be higher in the proposed than in the baseline model?

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?

The project is built on a site with existing exterior lighting installed. How should this be accounted for?

Can mezzanines open to floors below be excluded from the energy model?

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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?

Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

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?

For an existing building, do I need to rotate the model?

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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

LEED NC Retail Table 1-4 Process Efficiency Measures

I am working on LEED ratail project for EAp2 option 1. Do we need to alway fill out the process equipment data including cooking, hood, refrig in the "LEED Retail Table 1-4 Process Efficiency Measures" as required by the LEED NC retail template? In my case, I will not claim any saving from all process equipment (process energy of baseline and proposed will be identical). Such table is very hard to fill out and would be nice if not require to be submitted. Can anyone guide me? Thanks

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

Fri, 01/10/2014 - 17:22

Yes if you project contains any of the equipment listed in the question. It is not only for claiming savings but also serves as an input summary for the modeling of this equipment.

Fri, 01/10/2014 - 17:33

Thanks What happen if some of the equipement do not have the data to pass the "Prescriptive Criteria". Some equipments were made local and have no data such as efficiency. What if I just list all the equipement and did not try to get any claimed saving. For example, in Table 1, select "No" in the "prescriprive criteria met" role and select "manual calcuation" for bote baseline and proposed of "energy calculation methodology". Will this OK with EAp2 requirement?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 01/10/2014 - 17:57

I would think that as long as you model the equipment identically and provide a good summary of what you have modeled (with specifics) it should be acceptable.

Fri, 01/10/2014 - 18:03

Thank so much.

Thu, 01/16/2014 - 15:30

EAp2-3 section 1.4 table provided by LEED, under the Air-Side HAV Details. Cell C26 indicates "Sum of fan power for all supply, return, relief, and exhaust fans cannot exceed G3.1.2.9 system fan power allowance calculated using supply cfm". However, I don't see or think ASHRAE 90.1 is limiting the fan powered only to the supply fan cfm. Please let me know your thoughts on this.
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 01/20/2014 - 18:38

The statement is correct. The total baseline fan power is calculated using the supply cfm for the baseline system according the G3.1.2.9. There are other inputs, like the pressure drop adjustments, into the calculations but it always starts with the supply cfm. The total fan power is then distributed among the baseline system fans, typically in similar proportion to the proposed system if applicable.

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