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OSHA's Respiratory Protection Standard 29 CFR 1910.134 > Slide 33	Printing Instructions | Text Version
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TEXT VERSION OF SLIDE: Title: TABLE 1 - ASSIGNED PROTECTION FACTORS Type: Data Table Content:   TABLE 1 – ASSIGNED PROTECTION FACTORS5 Respirator Type1,2 Quarter Mask Half Mask Full Face Helmet/Hood Loose-Fitting Air Purifying 5 310 50 ------------- ------------ PAPR ------------- 50 1,000 425/1,000 25 SAR Demand Continuous Flow Pressure Demand/ other (+) pressure ------------- ------------- ------------- 10 50 50 50 1,000 1,000 ------------- 425/1,000 ------------- ------------ 25 ------------ SAR Demand Pressure Demand/ other (+) pressure ------------- ------------- 10 --------- 50 10,000 50 10,000 ------------ ------------ 1May use respirators assigned for higher concentrations in lower concentrations or when required use is independent of concentration. 2These APF’s are only effective when employer has a continuing, effective respirator program per 1910.134. 3This APF category includes filtering facepieces and elastomeric facepieces. 4Must have manufacturer test evidence to support an APF of 1,000 or else these respirators receive an APF of 25. 5These APFs do not apply to escape-only respirators. Escape respirators must conform to 1910.134(d)(2)(ii) or OSHA’s substance specific standards, if used with those substances.

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