hi Marcus / hi everyone,
We have a LEED CI project that is part of a 4 storey commercial building. Only portion of the Ground Floor will be part of the LEED CI project. Each tenant space has their own split type air conditioning system. Basically the LEED CI project is totally independent from any other tenants in the building, the building has no centralized plant.
We plan to pursue Option 1. Tenant-Level Energy Simulation, my questions are:
1. Should the energy modeler include all the building (with the actual independent split type AC systems of the LEED Ci project) in the energy model and use the baseline system for other tenants? or can we isolate the LEED CI project scope and document only within the LEED CI boundery?
2. For tenants that are not part of LEED CI (with independent split type AC system), should the energy model use the ASHRAE 90.1 compliant building envelope for other tenants of the building or the actual installed glass for the Proposed Case? - in accordance to 90.1 Table G3.1(5) (baseline), Sections a–e, and not Section f.
i have read the Reference guide but I just want to make sure that I am correct. We hope to hear from you soon.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
October 9, 2018 - 10:13 am
1. Since there are not system overlaps you should be able to isolate just the CI space and model it as a standalone space. Make sure to account for any building element if it impacts the CI space's energy use. Interior adjacent spaces that are conditioned should be modeled as adiabatic.
2. Unless these other spaces impact the CI space's energy use you would not need to model them at all. If you do need to model these spaces the baseline envelop is according to Appendix G (not including Table 3.1-5 Baseline (f)), and the proposed is as designed.
Marie Garcia
ArchitectOctober 10, 2018 - 11:16 am
I appreciate your immediate response Marcus! Thank you!
Just last query, if the modeler will isolate the space, the baseline will be modeled with System 8 because the project is part of a high rise commercial building, will there be an adjustment since there might be an effect of such system type with a small project scope? or should the modeler do it with System 4 that is appropriate for the project scope size?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
October 10, 2018 - 3:12 pm
CI projects are required to select the baseline system on the whole building, not just their part of it.
Marie Garcia
ArchitectOctober 10, 2018 - 11:37 pm
thank you so much for the enlightenment Marcus!