Page:NIOSH DM DFM respirator evaluation draft.pdf/23

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WORKING DRAFT 9.15.92—Performance Evaluation of DM and DFM Filter Respirators
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Table F—NIOSH's 1987 Recommended Assigned Protection Factors for Particulate-Filter Respirators.

Assigned
Protection Factor		 Type of respirator[1]
5 Single-use (see definition in Glossary) or quarter mask[2] respirator
10 ―Any air-purifying half-mask respirator including disposable[3] (see definition in Glossary) equipped with any type of particluate filter except single use[2][4]
―Any air-purifying full facepiece respirator equipped with any type of particulate filter[5]
25 ―Any powered air-purifying respirator equipped with a hood or helmet and any type of particulate filter[4]
50 ―Any air-purifying full facepiece respirator equipped with a high efficiency filter[2]
―Any powered air-purifying respirator equipped with a tight-fitting facepiece and a high efficiency filter[4]
  1. ↑ Only high efficiency filters are permitted for protection against particulates having exposure limits less than 0.05 mg/m³.
  2. ↑ 2.0 2.1 2.2 The assigned protection factors (APF's) were determined by Los Alamos National Laboratories (LANL) by conducting quantitative fit testing on a panel of human volunteers.
  3. ↑ An APF of 10 can be assigned to disposable particulate respirators if they have been properly fitted using a quantitative fit test. Otherwise a 5 shall be assigned.
  4. ↑ 4.0 4.1 4.2 The APF's were based on workplace protection factor (WPF) data or laboratory data more recently reported than the LANL data.
  5. ↑ The APF was based on consideration of efficiency of dust, fume, and/or mist filters.
Centers for Disease Control
Centers for Disease Control
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