Which type of respirator does not require power to operate?

A non-powered air-purifying respirator is designed to filter out harmful substances from the air without the need for any external power source. It relies on the user’s breathing to draw air through filter media, effectively capturing contaminants such as dust, fumes, and particulates. This makes it a versatile and straightforward option for respiratory protection in various environments where air quality is compromised.

In contrast, other types of respirators, such as powered air-purifying respirators and self-contained breathing apparatus, require power to operate. Powered air-purifying respirators utilize a battery-powered blower to actively draw air through filters, increasing the airflow to the user. Self-contained breathing apparatus provides its own air supply from a tank and often has additional components that may require power for proper operation.

An airline respirator delivers clean air through a hose connected to a stationary air source and, while it does not require a battery or similar power source, it is not considered non-powered as it relies on a continuous supply of air from an external system. Thus, the non-powered air-purifying respirator stands out for its simplicity and independent function, making it the correct choice for the question.