See all forum discussions about NC-2009 EAp2
 Subscribe to new posts about NC-2009 EAp2 Post a new question aboutNC-2009 EAp2
See LEEDuser’s guidance on NC-2009 EAp2»
FAQs about EAp2 :

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?

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?

View answers »

Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Revised Section 1.4 Form Units

Default Avatar
HOUCINE TLEMSANI
Mechanical Designer
MEP Engineering Solutions, Inc
LEEDuser Basic Member
8 thumbs up

Hi i am working on a project and using the Revised section 1.4 Form since the project was been registered after mars 2013. The lighting part of the Form is a bit confusing. the assumption on the form is that both, proposed and baseline building are modeled base on the space by space or the building area method. this is true for the base line not the proposed. the proposed case is modeled with the actual load. DO we have to input the lighting power for each space in the building or there is a work around. the same for the process load side. any help will be great.

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 10/25/2013 - 19:58

You must use the same methodology for both models. That is why the form does not let you mix them. Process loads must be identical too. If you want to claim process load savings you must use the exceptional calculation method.
Default Avatar
HOUCINE TLEMSANI
Mechanical Designer
MEP Engineering Solutions, Inc
LEEDuser Basic Member
8 thumbs up

Fri, 10/25/2013 - 20:12

in the base line I am using the building type methodology office building 1 W/sqf. the proposed is modeled as designed in accordance with G 3.1.6.a in this case i take the total lighting power for the proposed building and divide it by the building SQF and input it in the form as W/sqf for the hole building.
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 10/25/2013 - 20:26

Using the Building Area Method you take the 1 W/sf for the baseline and enter that value for the lighting in each zone. For the proposed you add up the wattage and divide by the sf and then you use that value in your model in each zone. You do not vary the lighting power density per zone as you have in the proposed design. Yes this seems to violate the model as designed requirement but 90.1 is full of these contradictions. In our experience you will generate more energy savings if you use the space-by-space method and it is more accurate. We never use the building area method.
Default Avatar
HOUCINE TLEMSANI
Mechanical Designer
MEP Engineering Solutions, Inc
LEEDuser Basic Member
8 thumbs up

Fri, 10/25/2013 - 20:34

Thanks Marcus

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.