Q: Is the protocol viable in the case of the replacement of several chillers by a single one if there are no existing measures on the old chillers ?

A: Yes - but would depend on how much other information and data may be available to support the baseline of the existing chillers, even if a direct measurement of the existing chiller energy use or efficiency is not available. Most likely appropriate Option would be Option A or B to focus on the chiller retrofit and the associated measurement of the new chiller efficiency (key parameter) or total energy use. Adherence with IPMVP would be dependent on the nature of the existing baseline data that may be available to substantiate and support the baseline energy use.