Chiller

The quick, but probably unsatisfactory answer, would be “yes”. All energy using systems should be commissioned that serve the building, but there are some other aspects if dealing with a District Energy System (DES), but even that has some requirements. To give better guidance, I would need a little more information. You mention “tenants”, does that mean you are doing a core and shell project, or is the chiller plant in your building feeding other buildings? Is the plant existing or being installed with your project? The metering is a whole different question, and again depends on how it is being fed. If part of a DES, then the metering would likely be a Btu meter for water used by your part of the project. Again, just do not have enough information to give you much more information.