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NC-v4 EAp2:Minimum energy performance

Partial use of Plant equipment for LEED certification

Greetings,

The project we are modeling consists of two building attached tightly one to the other (wall to wall). The HVAC project has been developing  these two building by applying one common energy providing plant equipment center (chillers, district heating substation, etc.).

The investor has been considering to proceed with LEED certification, but just for one of the buildings.

The question is: How to proceed with the plant equipment, which are serving the two buildings. Should we enter their partial capacities, or ….

Your advice is highly appreciating.

Thanks.

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Fri, 11/04/2022 - 15:10

Hello Vassil, according to appendix g you must model according to the building, however in these cases where you have shared equipment different considerations are made. There is a reference guide that explains that for these cases you should consider an "adjusted parameter" I attach the link, greetings. https://www.usgbc.org/leedaddenda/10412

Fri, 12/16/2022 - 12:50

Since the plant equipment serves more than the LEED project building, the DES modeling guidance from the LEED v4 Reference Guide applies. Given the nature of the plant you've described (on-site chillers for cooling and district heating) it might make sense to model the cooling according to Option 1, Path 2: Full DES Performance Accounting in which a virtual DES-equivalent chiller plant would be modeled which has been prorated to the LEED project building, and model the heating as district heating according to Option 1, Path 1: ASHRAE 90.1-2010 Appendix G.

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