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

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?

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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

Humidifier / Economizer / Energy Recovery

Hi, I would like to ask 3 simple questions: 1) if a humidifier in proposed AHU is presented, can it be considered as a process load and thus modeled in baseline? For example a spray chamber has significant energy consumption throughout the year. Also it increase indoor air quality and in this point the proposed building is in disadvantage against baseline because baseline does not care about indoor air quality within PRM simulation. 2) Earlier in this forum was discussed the minimum outdoor air rates in zones without OA supply in the baseline (e.g. servers). My question is when the baseline thermal zone has no OA it means that no economizer shall not be included as well? It sound logical for me but G3.1.2.6 states that "...economizer shall be included in baseline systems 3 through 8..." and there is no exception for this neither. So it's not clear to me. 3) I just want to make sure about energy recovery. If the baseline system 7 VAV with design supply airflow of 72500 cfm and Minimum Outdoor Airflow of 32500 cfm, is energy recovery required? According to G3.1.2.10 the energy recovery is required when individual fan system have both a design supply air of 5000 cfm (72500 > 5000) and have a minimum outdoor air supply of 70% or greater (32500/72500 = 45%). So in this case the energy recovery should not be included. Is that right??? Thanks for any answer in advance.

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Fri, 02/10/2017 - 18:11

1. It is process and should be modeled identically. 2. Makes sense. 3. Sounds right.

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