Which are the two principal types of respirators used in confined spaces?

The principal types of respirators used in confined spaces are categorized into supplied air and air purifying respirators. Supplied air respirators provide clean air from an external source, which is essential in scenarios where the atmosphere is hazardous or oxygen-deficient. This type of respirator is crucial in confined spaces where contaminants may be present or where the oxygen level falls below safe thresholds.

On the other hand, air-purifying respirators filter the air in the immediate environment to remove harmful substances, allowing the wearer to breathe in safe air. They are effective in situations where the atmosphere is not immediately dangerous to life or health, and there are known contaminants that can be filtered out.

Understanding the distinction between these two types is vital for ensuring worker safety in confined spaces, as it determines the appropriate respiratory protection based on the specific hazards present. Choosing the right respirator type based on the conditions in a confined space can significantly reduce the risk of exposure to harmful agents.