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Respirator fit testing is required for mandatory use of all tight-fitting facepieces and recommended for voluntary use.

OSHA 1910.134(f) states:
“The employer shall ensure that an employee using a tight-fitting facepiece respirator is fit tested prior to initial use of the respirator, whenever a different respirator facepiece (size, style, model or make) is used, and at least annually thereafter.”      (Link: Read OSHA standards)

Employees issued powered air purifying respirators and supplied air respirators with loose-fitting facepieces, hoods or helmets are not subject to fit testing.

3M Occupational Health and Environmental Safety Division (OH&ESD) offers a training video and other information on Respirator Fit Testing on its web pages. Some content is also available in Spanish.
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