This European Standard covers the calculation of the operational parameters and the energy consumption of cooling generation systems. The cooling generation consists of: ?? cooling generators like compression and absorption chillers; ?? other (generic) generator types such as ground or surface water or direct use of ground heat from boreholes; and ?? different types of heat rejection (dry@ wet@ hybrid with outdoor air@ other sink types). The methods cover: ?? the possibility of heat recovery of heat to be rejected for the use of heating and/or domestic hot water production@ through the use of an interface to the M3-1 standard; and ?? a multi generator calculation. The document does not cover the cooling emission@ distribution and storage systems@ which are covered by the Module M4-5@ M4-6 and M4-7 standards@ respectively. It is directly connected to the general part of the cooling systems@ the M4-1 standard. Table 1 shows the relative position of this standard within the set of EPB standards in the context of the modular structure as set out in EN ISO 52000-1:2017. NOTE 1 In CEN ISO/TR 52000-2 the same table can be found@ with@ for each module@ the numbers of the relevant EPB standards and accompanying Technical Reports that are published or in preparation. NOTE 2 The modules represent EPB standards@ although one EPB standard might cover more than one module and one module might be covered by more than one EPB standard@ for instance a simplified and a detailed method respectively. See also Clause 2 and Tables A.1 and B.1.