Although air conditioners were installed, the long side production line lay outside their direct cooling reach. Workers could not sufficiently feel the cooling even when the equipment was operating.
Cool air weakened over the distance and did not deliver enough airflow to workers 20 m away, leaving the end of the line in a cooling dead zone.
Cooling the entire factory increased equipment and operating costs while the workers who needed cooling remained hot. Air distribution needed improvement before adding equipment.
We redesigned the airflow path around the mismatch between equipment and worker locations. Cool air was directed to the actual work zone rather than being lost in intermediate spaces.
Discharge directions and distribution were adjusted to prevent a sharp loss of airflow over the distance, maintaining perceptible cooling at the end of the 20 m line.
More uniform cooling along the line reduced comfort differences between the beginning and end, creating a worker-focused cooling environment.
Cool air that previously could not reach the area now arrived reliably at the end of the side production line, delivering effective cooling over the full length.
The actual occupied zone achieved a cooling environment around 24°C, reducing the burden of heat on workers.
Distributing cool air to occupied zones rather than the entire space enabled more efficient cooling with the same equipment.
Reduced comfort differences across the line improved worker satisfaction and working-environment stability, including at the farthest positions.
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