本文件规定了所有条件下海商船起居舱空调和通风的设计条件和计算方法，但在极冷或极热气候（即低于或高于4.2和4.3中规定的条件）下遇到的情况除外。本文件还提供了附件中机械控制室、驾驶室和干燥食品储藏室的特殊注意事项C、 D和E。 注意法定要求、规则和条例可适用于有关的个别船舶。

This document specifies design conditions and methods of calculation for air-conditioning and ventilation of accommodation spaces on board seagoing merchant ships for all conditions, except those encountered in extremely cold or hot climates (i.e. with lower or higher conditions than those stated in 4.2 and 4.3). This document also provides special considerations for machinery control-rooms, wheelhouse, and dry provision store rooms in Annexes？C, D and E. NOTE？Statutory requirements, rules and regulations can be applicable to the individual ships concerned.