FAQs about EAp2 :

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?

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?

View answers »

Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Excellent Modeling Guide

In case you have not seen this relatively new guide I would highly recommend it to help with your modeling issues. ANSI/ASHRAE/IES Standard 90.1-2010 Performance Rating Method Reference Manual http://www.pnnl.gov/main/publications/external/technical_reports/PNNL-25130.pdf

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Mon, 08/22/2016 - 23:26

Wow. Very helpful. Thanks for sharing!

Tue, 08/23/2016 - 08:44

Hi Marcus, could you ask the chaps to improve Figure 3 (p 2.8) to include the <50 hrs difference in UMLH between the UMLH proposed and UMLH baseline boxes in the flow diagram? I don't have a direct email. Cheers, Jean

Tue, 08/23/2016 - 13:44

Hi Jean, This document is based on 90.1-2010 which eliminated the <50 hours. That is why it does not show in the diagram.

Tue, 08/23/2016 - 15:43

wooah...okay, that IS a heads up, thanks.

Tue, 08/23/2016 - 16:02

Where the modeling parameters did not change the specific guidance in this document should apply to 90.1-2007 models. Even if it did change much of the guidance would still help folks understand how to model many of the baseline requirements. Just need to keep an eye out for the changes in 90.1-2010. I already referred someone on LEED User to the part where it tells you how to model the fan controls for a system 8. Saved me a bunch of time!

Tue, 08/23/2016 - 16:08

Good to know. I noticed some big changes in baseline lighting, involving what looks like complex (and time consuming) area calculations for daylighting controls. How much more time than 2007 PRM would you estimate? 10%-20%?

Tue, 08/23/2016 - 16:18

I had not thought of it that way. But I suppose you are right that it will take some more time. I think once you get over the learning curve the extra time will be minimal.

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