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Forum discussion

CS-2009 EAp2:Minimum Energy Performance

CS building modeling with tenant design

Hi, I am modeling a LEED CS building for which we have decided to move ahead considering the tenant space lighting design and HVAC system to achieve maximum energy savings. The building has tenants occupied for approximately 70% of the total building space remaining 30% is still not occupied. Please clarify if I can consider the tenant lighting and HVAC design for the 70% of the tenant design spaces and rest 30% can we consider the baseline values as per the regular approach. Also if I can move ahead with the above approach then please confirm if I can consider that 70% of the tenant designed space as a single office block being a CS building rather than modeling each and every space as it will be occupied by a single tenant and the operational hours for all the spaces would be same. The overall lighting LPD value can be considered and the dedicated HVAC system will be considered as per the design.

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Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 06/07/2013 - 16:16

Yes you can claim savings for installed lighting in the tenant spaces. A potential conflict could arise if the tenant wanted to also pursue LEED ID+C. As far as modeling it you need to make sure to model appropriate thermal blocks per Appendix G. Occupancy type and schedule are not the only variables so you will need to model multiple spaces. If the tenant equipment is installed it can be modeled as such and the savings claimed for the CS project.

Fri, 06/07/2013 - 17:27

Thank You Marcus, I am having one more doubt actually I have already got a review for the project but at the time of submission all the design & interiors (tenant spaces) were not finalized so I had submitted the model with the available data at that time. Just wanted to check if it be right to revise the model as per the final design & interior, as the review comment states to attach design documents (tenant design data)
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Fri, 06/07/2013 - 18:30

Make sure you thoroughly explain what you have done and provide documentation (tenant HVAC schedules for example) to back up what you are changing in the models.

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