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NC-v4 EAp2:Minimum energy performance

District Energy Systems

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Bob Crowell
Vice President / Principal
2rw Consultants, Inc.
LEEDuser Basic Member
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Marcus or anyone who knows the answer, I have a squash facility that is being added on to an existing building. The LEED Boundary does not include the plant. 1) The existing plant serves only one building so can I still treat this as a district energy system because the DES Guidance LEED v2 and 2009 states that a DES is a "central thermal energy conversion plant...that provides thermal energy to MORE THAN ONE building..." 2) If so, is there a DES Guidance for V4 or should I stick with the current DES Guidance. Thanks a bunch!

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 08/10/2017 - 18:16

An addition to an existing building is usually still only one building. Sounds like only one building so it is not a DES. The DES guidance for v4 is now included within the LEED Reference Guide. There have been some significant changes.
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Bob Crowell
Vice President / Principal
2rw Consultants, Inc.
LEEDuser Basic Member
1 thumbs up

Thu, 08/10/2017 - 18:19

Thanks Marcus! How should I model the plant if it is not included within the boundary? Model it the same in the Baseline and the Proposed? Is there a way to take credit for the plant without moving the boundary?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 08/10/2017 - 18:33

We submitted a CIR many years ago on this subject for a building addition. I think the same approach would apply. We just apportioned a portion of the load from the central plant to the addition demonstrating that the plant had sufficient excess capacity. The baseline would still be Appendix G. let me know if you have trouble finding the old CIR and I can try to dig it out.
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Bob Crowell
Vice President / Principal
2rw Consultants, Inc.
LEEDuser Basic Member
1 thumbs up

Thu, 08/10/2017 - 20:19

Hey Marcus, I've tried to find the CIR with no luck. ID#1644 sounds like what you were talking about but I'm not sure. I typed in "building additions" with no luck and all the interpretations are LEED v2 related. Let me know if you end up finding this CIR!
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 08/10/2017 - 21:42

LEED Interpretation 5496. It was for a LEED v2.2 project.

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