Which type of respirator provides contaminated air filtration but does not supply oxygen?

The type of respirator that provides contaminated air filtration but does not supply oxygen is an air-purifying respirator. This respirator is designed to filter out harmful particulates, gases, and vapors from the air that the user inhales. It operates by using special filtration mechanisms to capture contaminants, allowing for cleaner air to be inhaled while the surrounding air is not enriched with additional oxygen.

In contrast, an air-supplying respirator delivers a source of clean, breathable air to the user, which is essential in environments where oxygen levels are low or harmful gases are present. A dust mask, typically a simple, unvalved cloth or paper covering, may filter out large particles but lacks the sophisticated filtration capabilities needed for the diverse range of contaminants encountered in structural pest control. A half-face respirator covers only the lower part of the face, providing filtration capabilities but not necessarily offering the same level of protection as a full-face air-purifying respirator.