Which condition must be evaluated before using a respirator?

When evaluating the conditions for using a respirator, it is crucial to assess employees' physical ability. This assessment is important because certain respiratory conditions or health issues can impair an individual's ability to use a respirator effectively or can put their health at risk when exposed to hazardous environments. Factors such as lung function, overall physical fitness, and any pre-existing medical conditions need to be taken into account to ensure that all employees can safely wear the respirator and perform their job duties.

While other factors, such as workplace rules, humidity levels, and the type of contaminants present, are all important considerations in overall safety planning, they do not directly assess the individual's suitability for using a respirator. Ensuring that employees are physically capable of using the equipment is essential to preventing accidents and health issues in a potentially hazardous environment.