Standard baseline for each piece of medical equipment

I am building a model for healthcare project and trying to save energy use as much as possible, but the energy use of medical equipment is huge. There are some comments about finding the standard baseline for each piece of medical equipment and use it as the baseline energy. Finally I found the energy use of three different brands of medical equipment, but I have no idea how to use it. Could I use the average as the baseline energy? Will it be accepted? Does anyone have the experience of finding the standard baseline for each piece of medical equipment? Thank you.