Why is ventilation important before entering a confined space?

Ventilation is crucial before entering a confined space because it helps eliminate hazardous atmospheres. Confined spaces often have limited airflow, which can lead to the accumulation of toxic gases, vapors, or insufficient oxygen levels. By using ventilation to increase air circulation, these harmful conditions can be mitigated, providing a safer environment for workers. Effective ventilation can dilute or remove contaminants, making the atmosphere safer for entry and work.

While noise reduction, visibility improvement, and cooling for workers are important considerations in various work environments, they do not specifically address the primary safety concerns associated with confined spaces, such as air quality and the presence of dangerous gases or insufficient oxygen. Thus, the emphasis on ventilation directly correlates to enhancing safety by ensuring breathable air for those who enter the confined space.