CA Title 24 Energy Modeling

LEED requires that all energy uses be included in the models. It does not matter whether the referenced standard exempts certain components from the compliance requirements. 90.1 also exempts certain lighting systems but they must still be modeled and included for LEED projects. It simply comes down to an issue of compliance vs savings. LEED requires you to determine savings, not just demonstrate compliance. If the referenced standard does not contain a baseline then the models should be identical, in other words, the baseline should be the same as the proposed.

You must model all energy uses within and associated with the project. Nothing is exempted from this requirement for LEED. The lighting in medical equipment is just an example of exempted lighting which is an example of process energy. This example is from 90.1. I do not know a default for something this specific. To get the information you should obtain the specific equipment cut sheets and determine energy use.

The ASHRAE 90.1-2007 User's Manual contains a table with acceptable receptacle power densities. For Health/Institutional it is 1.0 Watts/square foot; for Office it is 0.75 W/sf. Another good source of information on plug load data is COMNET - http://www.comnet.org/