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This Standard specifies the essential characteristics for household refrigerator-freezers with or without cellar, which are wholly factory assembled, and lays down the methods of test for the checking of these characteristics. It does not apply to refrigerator-freezers cooled by internal forced air circulation, which will form the subject of a future Standard, except for the measurement of volumes. Characteristics and methods of test for household refrigerators and for household frozen food storage cabinets and food freezers are covered in ISO 7371 and ISO 5155. The safety requirements applicable to household refrigerator-freezers are specified in IEC 335-2-24. Additional safety requirements applicable to mechanical refrigerating systems of household refrigerator-freezers are given in ISO 5149. The safety requirements applicable to gaseous and liquid fuel heating equipment of absorption type household refrigerating systems will form the subject of a future Standard.