FAQs about EAp2 :

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?

How do I provide a zip code for an international location?

For a project outside the U.S., how do I determine the climate zone?

For a project outside the U.S., how do I determine the Target Finder score?

Do hotel rooms need automatic light shut-off control?

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?

Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

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?

Our project has a diesel backup generator. Should we include it in our energy model?

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?

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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

LEED Interpretation 5253

I'm working on an appeal and the reviewer is asking me why our baseline heating went up significantly between the initial submission and our review response model. There are several reasons, many of them should be obvious to the reviewers since they were actions they required we do. That said they referenced one interpretation in their initial review comments. In that interpretation it says that in heating load driven residential units there is an energy offset penalty of approximately 40% for reductions to the residential lighting loads. So, for 4 of every 10 Watts saved by reduced lighting loads, it must be made up for increased heating energy and that the offset must be accounted for in the model. Well this explains why my baseline heating load jumped since the lighting load went down fairly significantly when we altered the baseline to match the proposed. My question is: when they say the model must account for the offset does that mean I am supposed to see an increase or are they saying I have to reduce my heating load in the baseline due to this. If I lower the coil size of the system serving these apartments by approximately 40% then my unmet hours will skyrocket. I guess I am just confused by what exactly they mean by the offset must be shown in the model because if that's the case, it makes me wonder why the reviewer denied my model when they expect the heating load to increase.

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Thu, 08/25/2016 - 15:19

Hard to say what they mean by offset but I interpret it to mean that the lighting must be included in the model as a load in the space so the effect on the heating and cooling is accounted for. Were interior lighting calculations performed outside the model? The baseline systems are auto-sized according to G3.1.2.2, so you should never lower the coil size.

Thu, 08/25/2016 - 15:43

Nope, they were included in the model. I guess I am a little gun shy because the asking of this question illustrates to me that perhaps this particular review team doesn't actually understand how the required alterations they outlined in their review comments would affect the baseline building which could lead to a vicious circle of denials and appeals as I try to explain to them why the changes they wanted created the very situation they denied the model for.

Thu, 08/25/2016 - 16:03

I would suggest you contact GBCI and ask to talk to the reviewer. Go to http://www.usgbc.org/contactus and post a certification question asking to speak to the reviewer for clarification.

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