As the popularity of Texas-style barbecue continues to rise, the distribution of barbecue equipment is also increasing. Entry-level barbecue equipment often lacks optimized air inlet and outlet positions, with the equipment’s structure typically featuring a vertical arrangement above and below. Due to the nature of equipment relying solely on natural convection, this structure leads to hot air accumulating in the upper part and cold air in the lower part. To address this issue, I aim to enhance it by relocating the air inlet to a position directly through the charcoal. To perform this analysis, we utilized Computational Fluid Dynamics (CFD) to identify the shortcomings of the existing model and to validate the effectiveness of the improved model. The improved model demonstrated a 7K increase in average temperature and a 45K increase in minimum temperature. Utilizing these results in barbecue equipment design could lead to more efficient cooking at the same production cost.