What type of respirators can be used in normal levels of oxygen?

Air Purifying Respirators are designed specifically for environments where the oxygen levels are within normal ranges. These respirators filter out harmful contaminants from the air while allowing users to breathe the existing atmosphere, making them suitable for situations where there is no immediate risk of oxygen deficiency.

In contrast, Powered Air Purifying Respirators and Self-Contained Breathing Apparatus are designed for more specific situations. Powered Air Purifying Respirators require a sufficient level of oxygen in the atmosphere to operate effectively, but they incorporate a battery-powered fan that assists in moving air through the filters. On the other hand, Self-Contained Breathing Apparatus provide their own oxygen supply and are used in oxygen-deficient environments or where the air quality is compromised.

Atmosphere-Supplying Respirators, such as those that deliver breathable air from a tank or a compressor, are employed primarily in environments where oxygen levels are low or where contaminants may pose a significant risk. Therefore, they are not intended for use in normal oxygen conditions.

Thus, Air Purifying Respirators are the most appropriate choice for situations with adequate oxygen levels, as they allow users to breathe normally while filtering out pollutants present in the atmosphere.