Centrifugal fans play an important role in the proper functioning of any travelling cleaner. This study presents a design methodology to examine the performance of the fan using computational fluid dynamics approach. The effect of fan geometry, fan speed and fillet radius at the inlet on performance of the fan have been assessed. Number of blades and the volute dimensions has been kept constant. Total discharge and fan total efficiency are the output parameters calculated. In order to reduce the number of trails, Taguchi method is used. The fan is modeled using Solid Works 2012 and after simplification the modeled fan is meshed in ICEM CFD. The solution is obtained using FLUENT V6. The post processing is carried out using CFD POST and the results are presented and discussed in detail. Finally the using Minitab 16.0 the responses of parameters have been plotted and the optimum values of the parameters are obtained. These obtained values need to be implemented into the design for better performance of the fan. © 2006-2014 Asian Research Publishing Network (ARPN).