Numerical investigation of thermal comfort using the mixing and displacement ventilation systems within a fitting room

•Mixing and displacement ventilation systems incorporated to a fitting room are investigated using computational fluid dynamics (CFD).•The air velocity and temperature distributions are analyzed to calculate the draft risk by means of the percentage dissatisfied (PD) approach.•The numerical results obtained are discussed and commented to highlight the efficient ventilation system that can provide an optimal thermal comfort.•The main findings showed very satisfactory results that agree well with those available in the literature. Comparing to the mixing ventilation system, the displacement ventilation system demonstrated a high draft risk, at the floor level.•In the breathing zone, the displacement ventilation system showcased a uniform temperature in the cubicles.