We use chemical vapor cartridges in the factory. How does respirator fit using Class 100 (HEPA) cartridges relate to respirator fit with chemical cartridges?

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We use chemical vapor cartridges in the factory. How does respirator fit using Class 100 (HEPA) cartridges relate to respirator fit with chemical cartridges?

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A fit test is a test of the face seal only, not the cartridges. You must fit test with cartridges that prevent passage of the test aerosol (ambient particles) or the test will not work. Since the face seal is not affected by the type of cartridge used, this should not be a concern.

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