My question to the professional engineers is how to apply the demand factors for the medical equipment in health care facilities. As you know the critical loads is too heavy and logically it is not possible to work all of these on the same time.
Can you be more specific?? Are you talking about all the equipment in an OR?? Or calculating a total building service?? Or medical imaging equipment?
Sometimes we do plan for all equipment to run. Sometimes the code allows demand factors, or other calculations. Sometimes historical usage data can be applied.