ISO/TS 13477:2013 provides guidance for assessing the use of fire zone models for calculating gas temperature and concentrations and smoke layer position due to fire within an enclosure. It contains general guidance to be read in conjunction with specific model documentation provided by the model developers. It is not a basis for justifying the use of any particular model.

It is important that users of fire zone models understand the theoretical basis of a model and are capable of assessing the accuracy and validity of the results.

Zone models can also include additional sub-models for predicting related phenomena such as sprinkler, thermal or smoke detector activation, mechanical ventilation, glass fracture or flame spread.

ISO/TS 13477:2013 is not intended as a basis for regulation.