Data centre and office

Hi, we have 2 buildings on our site pursuing two separate certifications. One is an office building and the other a data centre (one client). A portion of the office has some of the data centre equipment (command room) and is fed off a central system that serves the main data centre. Electricity for that room is also off the main data centre distribution board. Is it possible to model the energy use of the data centre portion of the office block with the main data centre and exclude it from the office model? (Even though it is housed in the office block) The reason for doing this would be to simplify the model so that we don't have to try and apportion energy use from different parts of the data centre.