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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?

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How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?

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

Evidence of efficiency

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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
19 thumbs up

1) We received data sheets from a set of construction documents that specify minimum efficiencies of chillers to be purchased. The efficiencies are the minimum efficiency requirements from ASHRAE efficiency tables. Is this sufficient evidence for compliance with EAP2? 2) How does USGBC confirm installation of this equipment? Do photographs with nameplates need to be sent? The project is in Sao Paulo, Brazil.

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

Mon, 07/23/2012 - 21:12

1. Yes it is. 2. No installation confirmation required including photos.
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Jean Marais
b.i.g. Bechtold DesignBuilder Expert
LEEDuser Basic Member
581 thumbs up

Tue, 07/24/2012 - 06:13

Just to clarify...this shows that your chillers are compliant to the ASHRAE standard 90.1...it does not mean automatic success for achieving EAp2 which entails compliance in many other aspects as well.
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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
19 thumbs up

Thu, 08/09/2012 - 17:24

Thanks for the response. Efficiency requirements seem to be a gray area in Sao Paulo, Brazil. ARI certifications are difficult to attain due to the need to export equipment to the US for the certification. Does USGBC trust the equipment manufacturers in Brazil (or any foreign country) when they say that their equipment complies with ASHRAE efficiencies? How do they know?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 08/09/2012 - 18:06

The short answer is yes they trust the manufacturer. When demonstrating compliance with the efficiency requirements, absent a test according to the appropriate standard, it is often necessary to provide a thorough explanation for how the equipment complies. The manufacturer would hopefully be able to help you explain it. They don't know for sure so provide a really good explanation with data from the manufacturer.

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