What is the minimum oxygen level percentage that should be maintained in confined spaces?

The minimum oxygen level percentage that should be maintained in confined spaces is 19.5%. This level is crucial for ensuring the safety and health of individuals who may be working in environments where oxygen levels can be depleted or replaced by harmful gases. At 19.5%, there is enough oxygen to support normal physical activity and thinking processes without the risk of hypoxia, which can occur when oxygen levels drop below this threshold.

Maintaining this level is significant in preventing accidents, unconsciousness, or even fatalities that can result from lower oxygen concentrations. Confined spaces pose unique challenges, such as inadequate ventilation, and thus adhering to this standard helps to mitigate respiratory hazards effectively.