Engineering Controls
Use of Fans and Evaluation at High Temperatures
Fans are another effective tool for promoting air circulation and providing a cooling effect. Strategically placing fans in work areas increases airflow and helps cool workers by enhancing sweat evaporation, thereby reducing the perceived temperature. Portable fans offer flexibility in positioning, making them suitable for various work environments.
However, the use of fans must be carefully evaluated at high temperatures. When temperatures exceed 102°F, it is crucial to monitor humidity levels to ensure that fans remain beneficial. High humidity can render fans ineffective or even harmful by circulating hot, humid air, which can add to heat stress rather than alleviate it. In such cases, it may be better to rely upon air conditioning and ventilation. Regular evaluation ensures that fans are used appropriately and continue to provide a cooling benefit without exacerbating heat stress.
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5-2. What should be carefully evaluated when using fans at high temperatures?
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