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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

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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

AHSRAE 90.1-2010 VRF Requirements

Rudolph Carneiro

HVAC consultant

Optimized Systems

LEEDuser Basic Member

19 thumbs up

November 27, 2013

This is a V4 doubt but I cant imagine anyone is monitoring the V4 forum so i decided that posting it here would be more effective. Does anyone know wether or not evaporator input power should be included in the efficiency calculation of a VRF system? At first look it seems obvious that it should but then you start comparing it to the efficiency requirements of a chilled water system and everything gets kinda confusing. You obviously dont include fancoil/ahu unit power input into your chiller efficiency calculation, so why would you include evaporator input power into your VRF system calc? Would it just be condenser cooling output divided by condenser input power? The funny thing is that the AHRI test procedures for split systems include evaporator input power.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 11/27/2013 - 20:36

I am monitoring the v4 forums and tried to help you there. I don't know the answer per se but you should be able to find it in the AHRI 1230 standard. I put a link to the free download in my reply.

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