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CS-v4 EAp2:Minimum energy performance

Tenant lighting savings with local code (T24) requirements

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Maria Grimm
Associate
Meyers+ Engineers
LEEDuser Basic Member
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Is it possible to claim tenant lighting savings due to local code requirements, without a signed tenant lease agreement? I'm working on a project in California and the LPDs in the tenant office will have to meet local code, with or without a tenant lease agreement. The prescriptive Title 24 requirement is 0.75 W/ft² in an open office space, and ASHRAE 90.1-2010 is 0.98 W/ft². It seems strange to model the tenant spaces as ASHRAE baseline LPD, since it is implausible that the tenants could install anything above 0.75 W/ft². I can't find any specific CIRs that address this particular question, any input would be appreciated. Thanks!

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Marcus Sheffer
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7group / Energy Opportunities
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Tue, 05/28/2019 - 16:13

It is worth a shot. Are the LPDs mandatory or can they be used to trade off kike in 90.1?

Mon, 06/15/2020 - 23:15

Following up on this, since the LPDs are part of the Prescriptive -- not Mandatory-- section of Title 24, would the most appropriate path be to go with 90.1 for the shelled spaces in the Proposed model? I have a similar question for a v4 New Construction project with some unfinished Tenant spaces and am wondering how to apply Title 24-2016, particularly in light of the new CIR regarding Title 24-2019: https://www.usgbc.org/leedaddenda/10498. Thanks!

Fri, 08/21/2020 - 15:26

Using the 90.1 LPDs for the shelled spaces is the most straightforward path, assuming you are using 90.1 as the modeling code for EAp: Minimum Energy Performance. If you are using Title 24-2016 as the modeling code you would apply LEED Interpretation 10480: https://www.usgbc.org/leedaddenda/10480. You could also likely apply LEED Interpretation 10498 (https://www.usgbc.org/leedaddenda/10498) for the unfinished tenant lighting only and just substitute Title 24-2016 instead of Title 24-2019. You would need to provide all of the required documentation described in the interpretation.

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