Where is controlled ventilation explicitly required?

Controlled ventilation is explicitly required in each working place in an ERZ 1 (Explosive Risk Zone 1) because these areas are identified as having a higher risk of explosive gases or hazardous materials that can affect the safety of mine workers. Effective ventilation is crucial in these zones to dilute harmful gases, prevent the accumulation of toxic air, and maintain a safe working environment.

In an ERZ 1, controlled ventilation systems help ensure that air quality is continuously monitored and maintained at safe levels, which is a significant safety measure mandated by mining regulations to protect workers from hazards associated with poor air quality and explosive atmospheres. Therefore, the requirement for controlled ventilation in these specific zones reflects the necessity of managing risks to workers' health and safety in areas where they may be exposed to dangerous conditions.