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

CS-2009 EAp2:Minimum Energy Performance

Building Area Method used at whole building simulation

Assuming that I use the BAM for showing compliance with the minimum energy performance prerequisite do I have to use the BAM also at the simulation for EAc1? It would be more meaningful to use the values of table 9.6.1 (space-by-space) instead of the same LPD for every space types in the building. However the ASHRAE UsersManual states on page G-36 >>If the building area method is used, it must be used throughout the whole project.

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Wed, 09/05/2012 - 14:38

If you use Option 1 for EAp2 that is the method which determines the points for EAc1. So they are tied together. You do need to use the same lighting power density method in both models. We always use the space-by-space method as it is the more accurate of the two options and usually shows greater savings.

Wed, 09/05/2012 - 15:19

I'm not sure if I understood it right. If we use the BAM to show compliance with ASHRAE section 9.4, do we also have to use the BAM at the simulation?

Wed, 09/05/2012 - 16:09

Only exterior lighting is covered under 9.4. Interior lighting is not a mandatory provision. It is a prescriptive requirement and therefore eligible for tradeoff so you do not have to meet or exceed the values in 9.5 or 9.6.

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