Core fixtures included?

GBCI has confirmed that all fixtures used by the occupants need to be included in the calculations. The following email was received from GBCI: "Existing fixtures and/or those in common areas of the buildings are still to be included in the LEED 2009 WEp1 calculations (as they were in the LEED-CIv2.0 WEc1 calculations) if they are used by the occupants of the LEED-CI tenant space regardless of whether or not other tenants share these fixtures."

I have read comments both ways about using the common area toilets in the calculations when preparing certificaiton submittals for a tenant that has no water closets in the space, only a break room sink. In our case, the shell building did not try to get any WE credits. Of course in the 2009 Commercial Interiors there is a Prerequisite to use 20% less water than the water use basline calculated for the tenant space-my consultant is telling me we only have to calculate fixtures in our tenant space. Seeing your comment reinforces my belief that you have to use the common area facilities as well. Was this email in response to your CIR submittal and is it published on the GBCI site? I don't see it in the CIR search.

Kathleen, This information is not from a formal CIR submittal, but an answer from an email inquiry to GBCI. WEp1 is a bit different than other CI credits (usually only focused on items within your scope) as it needs to include all fixtures that are used by the occupants, whether they are within the tenant scope or not. Therefore, it seems as though the common area fixtures need to be included in your WE calculations.