Clarification on C&S and MEP Systems

You can incorporate energy saving strategies in your model if they have been designed or if you have tenant guidelines that require certain levels of performance in the lease agreements. Tenant spaces without a design or tenant guidelines should be modeled identically to the baseline for those items to be designed or installed in the tenant fit out.

You understand correctly. I do not think the other tenant space would be required to have the same requirements. Neither would have to get ID+C certified.

If I may add, the key to this is to carefully draw the distinction between what is tenant scope and what is base building scope. If the tenant interior spaces are undefined, the LEED submittal process and analysis needs to be consistent across all LEED credits. The base building needs to be modeled and in order to do that enough of the design needs to be carried out and commissioned in order to qualify for C&S. This goes for all systems: HVAC, lighting, lighting controls, and water fixtures. Whatever you plan to have commissioned also needs to be considered in all of the other EA and relevant IEQ credits. If you know what the tenant spaces will look like and you have designed all of the branch systems and coordinated everything with the base building model, commissioning and other credits, then you might as well include it so that you don't have to carefully craft an imaginary division of work that I just described above. Marcus is the expert here, but this is based on my own experience.

I agree Brian. If is it already designed that is the most accurate way to model it.