This paper presents the feasibility of using Computational Fluid Dynamic (CFD) simulation for gas hobs design with the aim of improving the efficiency and emissions (CO and CO2) performances. CFD analysis of a hob including the combustion simulation can take notably long time considering that it shall be solved time dependent (transient). In this regard, a shortcut method based on comparison between different design/modifications of the model is developed to reduce the solving time. Combustion simulation was fulfilled for a quarter of a Candy Hoover Groups' hob with a semi rapid burner under the same laboratory conditions using FloEFD with Advanced Module for Combustion. For evaluation, distance changing between burner cap and pot bottom was studied. By increasing the distance, decreasing of the CO emission and the energy efficiency and increasing of the CO2 emission were observed. These results of CFD analysis are in excellent agreement with experimental results from laboratory tests. Therefore, this study reveals that CFD analysis can be reliably used in the gas hob design and optimization.