FAQs about EAp2 :

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?

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?

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?

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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

ventilation levels

I got this question via email and thought I would post it here for your help. Thanks!

Q: If a project is pursuing EQc2 Increased Ventilation, what ventilation levels do they model for EAp2 in the baseline model and what ventilation levels do they model in the proposed model? 

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Wed, 04/20/2016 - 16:32

Both as designed.

Wed, 04/20/2016 - 19:46

There is one exception that allows the modeler to claim savings when demand-control ventilation is incorporated into the design when it is not required by ASHRAE 90.1-2007 Section 6.4.3.9.

Thu, 04/21/2016 - 15:50

Yes, but in that case, they will need to model baseline ventilation as 62.1 minimum, wont that reduce your savings since your proposed is at least 30% over 62.1.

Thu, 04/21/2016 - 19:51

DCV reduces OA levels below the ASHRAE minimum during times of actual low occupancy so it should reduce the total annual energy consumption. It is not a gauranteed energy saving measure, however it may lead to savings. The preliminary modeling runs will help the team determine if savings are achieved. You bring up a great point, thank you for posting.

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