It is illustrated how computational modelling techniques are used atCorus RD&T as a means to investigate and improve fume emission,air quality and heat control throughout the steel processing route.Some of the recent areas that have benefited from such models are:the redesign of a coater line room, a storage and production facilityand fume capture during iron desulphurisation and casting. Themodelling techniques, the challenges of using such models and theresults are summarised.