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NC-2009 EAp2: Minimum Energy Performance

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California Title 24-2005 Part 6 vs. ASHRAE 90.1-2007

April 30, 2013

Erica Suarino

Sustainability Consultant
Steven Winter Associates

LEEDuser Basic Member

3 thumbs up

April 30, 2013

It's clear from the credit language and LEED Online form that California Title 24-2005 Part 6 can be used in place of ASHRAE 90.1-2007 as a baseline when creating an energy model. However, it is unclear if compliance with Title 24 ensures that the project meets all ASHRAE 90.1's Mandatory Provisions. Has anyone had success using only Title 24 to demonstrate compliance for this prerequisite?

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Marcus Sheffer

LEED Fellow
7group / Energy Opportunities

LEEDuser Expert

5909 thumbs up

May 2, 2013 - 11:46 am

If you are following Title 24 you do not have to demonstrate compliance with the ASHRAE 90.1-2007 mandatory provisions. You are basically substituting 90.1 compliance with Title 24 compliance.

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FAQs about EAp2:

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

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

For an existing building, do I need to rotate the 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

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Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

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The Section 9 space-by-space method does not include residential space types. What should I use?

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

Can SHGC be higher in the proposed than in the baseline model?

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