Which types of respiratory protection use a blower to pass contaminated air through a canister or filter to remove the contaminant and supply the purified air to the full facepiece?

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Powered air-purifying respirators (PAPRs) use a blower to pass contaminated air through a filter, canister, or cartridge to remove contaminants and supply the purified air to the user's breathing zone, typically covering the face or head and sometimes the body, depending on the design.

Which Types of Respiratory Protection Use a Blower to Pass