This standard deals with techniques and installations in the building services, which mainly serve to cool spaces occupied by humans. It can be applied by way of analogy to comparable tasks such as the cooling of data centres or production processes if they are used at a temperature above 0 °C. Typical installations on the demand side are: air coolers of ventilating and air-conditioning installations, space-cooling surfaces including systems for the thermal activation of building elements (chilled beams), other space-cooling installations such as induction devices, local ventilating and air-conditioning systems or fan convectors. All common heat transfer media which can be pumped are considered; examples are water, salt solutions or ice slush. Furthermore, direct evaporation systems are considered, where refrigerants are simultaneously used as energy carriers. Only such chillers and chilling systems are considered, in which a "closed" thermodynamic cycle occurs. Natural and synthetic chilling agents are used in such cases. Sorptive cooling is covered only in the form of an overview of techniques for supply for the sake of completeness; no details are given, because this technique is not classically a method for the supply of cooling.