Everything within the exterior walls of the data center should be included. That means that any floor area that supports the data center (regardless of whether there is IT equipment) should be included in the main Data Center Gross Floor Area (GFA). In our definition of Data Center, we specify that the GFA should include all space within the building(s) including raised floor computing space, server rack aisles, storage silos, control console areas, battery rooms, mechanical rooms for cooling equipment, administrative office areas, elevator shafts, stairways, break rooms and restrooms.
The only time to break something out is if there is an entirely separate function in the same building. For example, say a building has two “wings” and in one wing is the data center and the other is a sales office for the company. Though physically within one building the sales wing operates completely independently and could be moved to a different building within impacting the data center. This type of independent space should be broken out as a separate Office property use.
When a data center is located within a larger building, include only the spaces that are uniquely associated with the data center in the gross floor area. For example, do not include spaces shared by the data center and other tenants, such as break rooms or hallways.