This study develops and validates a Computational Fluid Dynamics (CFDComputational Fluid Dynamics (CFD)) model to assess pot tightnessPot tightness, heat transferHeat transfer, and airflow in aluminum electrolysisAluminum electrolysis cells. The model simulates upper and lower cell regions, focusing on reducing pot drafts to enhance energy efficiencyEnergy efficiency. Results show that while the current pot structure maintains tightness under normal conditions, it fails with significant draft reductionsReduction. Various ventilation designs were tested; barriers around anodeAnode rod gaps and partial hood coverage-maintained tightness under specific conditions but failed with larger gaps. Reducing ventilation rates to half at a 50% draft reductionReduction and one-quarter at 75% still ensured effective gas containment. The study also highlights the minimal impact of heat fluxHeat flux and open holes on leakage. The effects of current flux and temperature changes during anodeAnode replacement are examined, emphasizing their importance for operational efficiency. This analysis demonstrates the critical role of CFDCFD in optimizing pot design and ventilation strategies, contributing to improved efficiency and reduced emissionsEmissions in aluminum reduction cellsAluminum reduction cells.