This standard establishes a single set of requirements for the testing and rating of net usable storage capacity and auxiliary power input ratings for thermal storage equipment used for cooling; whereby, equipment performance ratings can be compared from product to product. The standard applies to thermal storage equipment used for cooling which may be charge and discharged with any of a variety of heat transfer fluids. The equipment may be fully factory assembled, assembled on site from factory supplied components, or field erected in accordance with pre-established design criteria.