1 .l This International Standard establishes performante testing and rating criteria for factory-made residential, commercial and industrial, electrically driven, mechanical-compression, ducted air-conditioners using air- and water-cooled condensers and ducted airto- air heat Pumps. The requirements of testing and rating contained in this International Standard are based on the use of matched assemblies. This International Standard is limited to Systems which use a Single refrigeration circuit and have one evaporator and one condenser. 1.2 This International Standard does not apply to the testing and rating of a) individual assemblies for separate use, b) equipment using the absorption refrigeration cycle, c) non-ducted air-conditioners or non-ducted heat Pumps, or d) water-Source heat Pumps. 1.3 lt does not cover the determination of either seasonal efficiencies or Part-load performances which may be required in some countries because they provide a better indication of efficiency under actual operating conditions. NOTE 1 For the purposes of this International Standard, the term “equipment” will be used to mean “ducted airconditioner” and/or “ducted heat Pumps”.