FAQs about EAp2 :

Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

Which baseline HVAC system do I use if my building has no heating or air conditioning?

A portion of our building envelope is historic. Can we exclude it from our model?

Our project has a diesel backup generator. Should we include it in our energy model?

For an existing building, do I need to rotate the model?

Can SHGC be higher in the proposed than in the baseline 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

Do I need to justify the electrical and fuel rates I am using in my model?

Our process load is higher than 25%. Do we have to justify that?

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?

View answers »

Forum discussion

Schools-2009 EAp2:Minimum Energy Performance

Proper way to apply ASHRAE 62.1 to baseline model?

I have a project where the proposed design has demand controled ventilation. I modeled the VAV baseline for these systems complying with the ASHRAE 62.1 table "Minimum Ventilation Rates in Breathing Zone" to comply with the USGBC's additional requirements. I did not apply the "system efficiency" even though the Baseline was VAV because it would end up having a very large correction due to the minimum's required for a System Type 5. The reviewer has commented that my baseline does not comply with ASHRAE 62.1 as is required by their additional requirements. The related IEQ credit has a comment that the baseline 62.1 calculation was not performed properly because it was not properly documented the proposed VAV systems have active constant outdoor air damper actuators rather than the traditional proportional fixed opening damper actuators. Can anyone provide some feed back as to how to proceed? Should I do a critical zone calculation using the baseline systems as designed to comply with ASHRAE 90.1, or am I over thinking this & I just need to comply with any revisions to the IEQ calculations?

0

You rely on LEEDuser. Can we rely on you?

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

Go premium for $15.95  »

Wed, 12/04/2013 - 13:14

After you correct the ASHRAE 62.1 ventilation calculations for IEQp1, the outdoor airflow rates in the baseline model should match the 62.1 minimum rates as calculated in IEQp1 for the proposed systems. You do not need to complete separate ventilation calculations for the fictitious baseline systems.

Add new comment

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