See all forum discussions about CS-2009 EAp2

Subscribe to new posts about CS-2009 EAp2 Post a new question aboutCS-2009 EAp2

See LEEDuser’s guidance on CS-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

CS-2009 EAp2:Minimum Energy Performance

Minimum air flows for simulation

TOMAS URIBE

PROJECT MANAGER

SOLUCIONES ENERGETICAS SOSTENIBLES

LEEDuser Basic Member

7 thumbs up

May 7, 2014

Hello Marcus. I have a question regarding minimum air flows for a core and shell project. the minimun cfm for the simulation must be the same in the energy model and IEQ p1 and IEQ c1. So I was using the cfm from the IEQ form under Design OA intake flow for the minimun air flows (nominal cfm for the fan). However the HVAC systems has VAV and will reduce the supply air depending of the thermal load. So should I use the values from Design OA intake flow or VOT for my energy model.

Post a reply

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 05/07/2014 - 16:20

Always model the proposed as designed, not using the calculated values. In the baseline model the system with the identical OA except when there is DCV in the proposed system then model the VOT in the baseline.

Add new comment

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