Devices used to remove contaminants from air in a fresh-air supplied respirator system.

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In a fresh-air supplied respirator system, clean air is delivered directly from an external source through a hose to the user. To protect the wearer from contaminants that could be carried in that supply, inline filtration devices are used on the air line. These air filtration/line filters remove particulates, moisture, and other potential contaminants before the air reaches the face, ensuring the breathing air stays clean. Air purification cartridges belong to air-purifying respirators that filter ambient air, which isn’t the primary setup here. Ventilation ducts are building HVAC components, not personal respirator parts. Breathing bags are storage for air in certain systems, not filtration devices in the supply line. So the device that removes contaminants from air in a fresh-air supplied respirator system is the air filtration/line filters.