{
  "name": "Respirator assigned protection factors \u2014 federal OSHA and Cal/OSHA, with maximum use concentrations",
  "description": "Assigned protection factors (APFs) for each respirator class under federal OSHA (29 CFR 1910.134 Table 1) and Cal/OSHA (8 CCR 5144), and \u2014 the derived layer \u2014 the maximum use concentration (MUC) each respirator class supports for a given substance, computed as APF \u00d7 the applicable exposure limit. The regulation itself states the formula ('The MUC can be determined mathematically by multiplying the assigned protection factor... by the required OSHA permissible exposure limit'), but nobody publishes the computed per-substance table, and OSHA and Cal/OSHA limits differ up to 10\u00d7 for 66 substances \u2014 so the same respirator is adequate federally and inadequate in California for the same job. Answers 'what APF does a half mask have', 'what respirator do I need for styrene at 300 ppm', and 'is my respirator sufficient under Cal/OSHA'. Pairs with the existing workplace-exposure-limits asset (1,184 records, two authorities) \u2014 the MUC pages are that asset multiplied through this one.",
  "url": "https://referencesource.org/respirator-assigned-protection-factors/",
  "licence": "US federal and California regulatory text; facts not copyrightable, sections quoted with citation.",
  "last_verified": "2026-08-10",
  "stale_after": "2028-08-09",
  "sources": [
    "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
    "https://www.dir.ca.gov/title8/5144.html"
  ],
  "records": [
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Full facepiece",
      "mode": "Continuous flow mode",
      "apf": "1,000",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-continuous-flow-mode-full-facepiece-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-continuous-flow-mode-full-facepiece-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Half mask",
      "mode": "Continuous flow mode",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-continuous-flow-mode-half-mask-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-continuous-flow-mode-half-mask-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Helmet/hood",
      "mode": "Continuous flow mode",
      "apf": "25/1,000",
      "jurisdiction": "29 CFR 1910.134",
      "conditions": "The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a WPF or SWPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.",
      "id": "29-cfr-1910-134-continuous-flow-mode-helmet-hood-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-continuous-flow-mode-helmet-hood-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | | \u2022 Pressure-demand or other positive-pressure mode (e.g., open/closed circuit) | | | 10,000 | 10,000 | | Notes: | 1 Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | 2 The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section ( <https://www.ecfr.gov/current/title-29/section-1910.134> 29 CFR 1910.134 ), including training, fit testing, maintenance, and use requirements. | 3 This APF category includes filtering facepieces, and half masks with elastomeric facepieces. | 4 The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a WPF or SWPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25. |",
      "verified_fields": [
        "apf",
        "conditions",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Loose-fitting facepiece",
      "mode": "Continuous flow mode",
      "apf": "25",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-continuous-flow-mode-loose-fitting-facepiece-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-continuous-flow-mode-loose-fitting-facepiece-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breathing Apparatus (SCBA)",
      "facepiece": "Full facepiece",
      "mode": "Demand mode",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-demand-mode-full-facepiece-self-contained-breathing-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-demand-mode-full-facepiece-self-contained-breathing-apparatus-scba/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Full facepiece",
      "mode": "Demand mode",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-demand-mode-full-facepiece-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-demand-mode-full-facepiece-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breathing Apparatus (SCBA)",
      "facepiece": "Half mask",
      "mode": "Demand mode",
      "apf": "10",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-demand-mode-half-mask-self-contained-breathing-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-demand-mode-half-mask-self-contained-breathing-apparatus-scba/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Half mask",
      "mode": "Demand mode",
      "apf": "10",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-demand-mode-half-mask-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-demand-mode-half-mask-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breathing Apparatus (SCBA)",
      "facepiece": "Helmet/hood",
      "mode": "Demand mode",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-demand-mode-helmet-hood-self-contained-breathing-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-demand-mode-helmet-hood-self-contained-breathing-apparatus-scba/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Air-Purifying Respirator",
      "facepiece": "Full facepiece",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-full-facepiece-air-purifying-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-full-facepiece-air-purifying-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Full facepiece",
      "apf": "1,000",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-full-facepiece-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-full-facepiece-powered-air-purifying-respirator-papr/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Air-Purifying Respirator",
      "facepiece": "Half mask",
      "apf": "10",
      "jurisdiction": "29 CFR 1910.134",
      "conditions": "This APF category includes filtering facepieces, and half masks with elastomeric facepieces.",
      "id": "29-cfr-1910-134-half-mask-air-purifying-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-half-mask-air-purifying-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | | \u2022 Pressure-demand or other positive-pressure mode (e.g., open/closed circuit) | | | 10,000 | 10,000 | | Notes: | 1 Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | 2 The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section ( <https://www.ecfr.gov/current/title-29/section-1910.134> 29 CFR 1910.134 ), including training, fit testing, maintenance, and use requirements. | 3 This APF category includes filtering facepieces, and half masks with elastomeric facepieces. |",
      "verified_fields": [
        "apf",
        "conditions",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Half mask",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-half-mask-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-half-mask-powered-air-purifying-respirator-papr/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Helmet/hood",
      "apf": "25/1,000",
      "jurisdiction": "29 CFR 1910.134",
      "conditions": "The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a WPF or SWPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.",
      "id": "29-cfr-1910-134-helmet-hood-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-helmet-hood-powered-air-purifying-respirator-papr/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | | \u2022 Pressure-demand or other positive-pressure mode (e.g., open/closed circuit) | | | 10,000 | 10,000 | | Notes: | 1 Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | 2 The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section ( <https://www.ecfr.gov/current/title-29/section-1910.134> 29 CFR 1910.134 ), including training, fit testing, maintenance, and use requirements. | 3 This APF category includes filtering facepieces, and half masks with elastomeric facepieces. | 4 The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a WPF or SWPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25. |",
      "verified_fields": [
        "apf",
        "conditions",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Loose-fitting facepiece",
      "apf": "25",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-loose-fitting-facepiece-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-loose-fitting-facepiece-powered-air-purifying-respirator-papr/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breathing Apparatus (SCBA)",
      "facepiece": "Full facepiece",
      "mode": "Pressure-demand or other positive-pressure mode (e.g., open/closed circuit)",
      "apf": "10,000",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-e-g-open-closed-circuit-full-facepiece-self-contained-breathing-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-e-g-open-closed-circuit-full-facepiece-self-contained-breathing-apparatus-scba/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | | \u2022 Pressure-demand or other positive-pressure mode (e.g., open/closed circuit) | | | 10,000 | 10,000 | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breathing Apparatus (SCBA)",
      "facepiece": "Helmet/hood",
      "mode": "Pressure-demand or other positive-pressure mode (e.g., open/closed circuit)",
      "apf": "10,000",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-e-g-open-closed-circuit-helmet-hood-self-contained-breathing-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-e-g-open-closed-circuit-helmet-hood-self-contained-breathing-apparatus-scba/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | | 4. Self-Contained Breathing Apparatus (SCBA) | | | | | | \u2022 Demand mode | | 10 | 50 | 50 | | \u2022 Pressure-demand or other positive-pressure mode (e.g., open/closed circuit) | | | 10,000 | 10,000 | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Full facepiece",
      "mode": "Pressure-demand or other positive-pressure mode",
      "apf": "1,000",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-full-facepiece-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-full-facepiece-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR) or Airline Respirator",
      "facepiece": "Half mask",
      "mode": "Pressure-demand or other positive-pressure mode",
      "apf": "50",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-half-mask-supplied-air-respirator-sar-or-airline-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-pressure-demand-or-other-positive-pressure-mode-half-mask-supplied-air-respirator-sar-or-airline-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline Respirator | | | | | | \u2022 Demand mode | | 10 | 50 | | | \u2022 Continuous flow mode | | 50 | 1,000 | 4 25/1,000 | 25 | \u2022 Pressure-demand or other positive-pressure mode | | 50 | 1,000 | | |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Air-Purifying Respirator",
      "facepiece": "Quarter mask",
      "apf": "5",
      "jurisdiction": "29 CFR 1910.134",
      "id": "29-cfr-1910-134-quarter-mask-air-purifying-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/29-cfr-1910-134-quarter-mask-air-purifying-respirator/",
      "source": "https://www.ecfr.gov/current/title-29/subtitle-B/chapter-XVII/part-1910/subpart-I/section-1910.134",
      "source_quote": "Type of respirator 1 2 | Quarter mask | Half mask | Full facepiece | Helmet/hood | Loose-fitting facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | | |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Full facepiece",
      "mode": "Continuous flow mode",
      "apf": "1,000",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-continuous-flow-mode-full-facepiece-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-continuous-flow-mode-full-facepiece-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Half mask",
      "mode": "Continuous flow mode",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-continuous-flow-mode-half-mask-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-continuous-flow-mode-half-mask-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Helmet/hood",
      "mode": "Continuous flow mode",
      "apf": "25/1,000",
      "jurisdiction": "Title 8, Section 5144",
      "conditions": "The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.",
      "id": "title-8-section-5144-continuous-flow-mode-helmet-hood-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-continuous-flow-mode-helmet-hood-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... | Pressure-demand or other positive-pressure | ...... | | 10,000 | 10,000 | ...... | mode (e.g., open/closed circuit). | | | | | | | Notes: | | | | | | 1. Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | | | | | | 2. The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section, including training, fit testing, maintenance, and use requirements. | | | | | | 3. This APF category includes filtering facepieces, and half masks with elastomeric facepieces. | | | | | | 4. The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.",
      "verified_fields": [
        "apf",
        "conditions",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Loose-fitting facepiece",
      "mode": "Continuous flow mode",
      "apf": "25",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-continuous-flow-mode-loose-fitting-facepiece-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-continuous-flow-mode-loose-fitting-facepiece-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breating Apparatus (SCBA)",
      "facepiece": "Full facepiece",
      "mode": "Demand mode",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-demand-mode-full-facepiece-self-contained-breating-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-demand-mode-full-facepiece-self-contained-breating-apparatus-scba/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Full facepiece",
      "mode": "Demand mode",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-demand-mode-full-facepiece-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-demand-mode-full-facepiece-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breating Apparatus (SCBA)",
      "facepiece": "Half mask",
      "mode": "Demand mode",
      "apf": "10",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-demand-mode-half-mask-self-contained-breating-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-demand-mode-half-mask-self-contained-breating-apparatus-scba/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Half mask",
      "mode": "Demand mode",
      "apf": "10",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-demand-mode-half-mask-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-demand-mode-half-mask-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breating Apparatus (SCBA)",
      "facepiece": "Helmet/hood",
      "mode": "Demand mode",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-demand-mode-helmet-hood-self-contained-breating-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-demand-mode-helmet-hood-self-contained-breating-apparatus-scba/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Air-Purifying Respirator",
      "facepiece": "Full facepiece",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-full-facepiece-air-purifying-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-full-facepiece-air-purifying-respirator/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Full facepiece",
      "apf": "1,000",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-full-facepiece-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-full-facepiece-powered-air-purifying-respirator-papr/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Air-Purifying Respirator",
      "facepiece": "Half mask",
      "apf": "10",
      "jurisdiction": "Title 8, Section 5144",
      "conditions": "This APF category includes filtering facepieces, and half masks with elastomeric facepieces.",
      "id": "title-8-section-5144-half-mask-air-purifying-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-half-mask-air-purifying-respirator/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... | Pressure-demand or other positive-pressure | ...... | | 10,000 | 10,000 | ...... | mode (e.g., open/closed circuit). | | | | | | | Notes: | | | | | | 1. Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | | | | | | 2. The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section, including training, fit testing, maintenance, and use requirements. | | | | | | 3. This APF category includes filtering facepieces, and half masks with elastomeric facepieces. | | | | | |",
      "verified_fields": [
        "apf",
        "conditions",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Half mask",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-half-mask-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-half-mask-powered-air-purifying-respirator-papr/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Helmet/hood",
      "apf": "25/1,000",
      "jurisdiction": "Title 8, Section 5144",
      "conditions": "The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.",
      "id": "title-8-section-5144-helmet-hood-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-helmet-hood-powered-air-purifying-respirator-papr/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... | Pressure-demand or other positive-pressure | ...... | | 10,000 | 10,000 | ...... | mode (e.g., open/closed circuit). | | | | | | | Notes: | | | | | | 1. Employers may select respirators assigned for use in higher workplace concentrations of a hazardous substance for use at lower concentrations of that substance, or when required respirator use is independent of concentration. | | | | | | 2. The assigned protection factors in Table 1 are only effective when the employer implements a continuing, effective respirator program as required by this section, including training, fit testing, maintenance, and use requirements. | | | | | | 3. This APF category includes filtering facepieces, and half masks with elastomeric facepieces. | | | | | | 4. The employer must have evidence provided by the respirator manufacturer that testing of these respirators demonstrates performance at a level of protection of 1,000 or greater to receive an APF of 1,000. This level of performance can best be demonstrated by performing a Workplace Protection Factor (WPF) or simulated WPF study or equivalent testing. Absent such testing, all other PAPRs and SARs with helmets/hoods are to be treated as loose-fitting facepiece respirators, and receive an APF of 25.",
      "verified_fields": [
        "apf",
        "conditions",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Powered Air-Purifying Respirator (PAPR)",
      "facepiece": "Loose-fitting facepiece",
      "apf": "25",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-loose-fitting-facepiece-powered-air-purifying-respirator-papr",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-loose-fitting-facepiece-powered-air-purifying-respirator-papr/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breating Apparatus (SCBA)",
      "facepiece": "Full facepiece",
      "mode": "Pressure-demand or other positive-pressure",
      "apf": "10,000",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-pressure-demand-or-other-positive-pressure-full-facepiece-self-contained-breating-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-pressure-demand-or-other-positive-pressure-full-facepiece-self-contained-breating-apparatus-scba/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... | Pressure-demand or other positive-pressure | ...... | | 10,000 | 10,000 | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Full facepiece",
      "mode": "Pressure-demand or other positive-pressure",
      "apf": "1000",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-pressure-demand-or-other-positive-pressure-full-facepiece-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-pressure-demand-or-other-positive-pressure-full-facepiece-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "2. A combination full facepiece pressure demand supplied-air respirator (SAR) with auxiliary self-contained air supply. (B) Respirators provided only for escape from IDLH atmospheres shall be NIOSH-certified for escape from the atmosphere in which they will be used. (C) All oxygen-deficient atmospheres shall be considered IDLH. Exception: If the employer demonstrates that, under all foreseeable conditions, the oxygen concentration can be maintained within the ranges specified in Table II (i.e., for the altitudes set out in the table), then any atmosphere-supplying respirator may be used. (3) Respirators for atmospheres that are not IDLH. (A) The employer shall provide a respirator that is adequate to protect the health of the employee and ensure compliance with all other OSHA statutory and regulatory requirements, under routine and reasonably foreseeable emergency situations. 1. Assigned Protection Factors (APFs) Employers must use the assigned protection factors listed in Table 1 to select a respirator that meets or exceeds the required level of employee protection. When using a combination respirator (e.g., airline respirators with an air-purifying filter), employers must ensure that the assigned protection factor is appropriate to the mode of operation in which the respirator is being used. Table 1. - Assigned Protection Factors 5 | | | | | | Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Supplied-Air Respirator (SAR)",
      "facepiece": "Half mask",
      "mode": "Pressure-demand or other positive-pressure",
      "apf": "50",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-pressure-demand-or-other-positive-pressure-half-mask-supplied-air-respirator-sar",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-pressure-demand-or-other-positive-pressure-half-mask-supplied-air-respirator-sar/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Self-Contained Breating Apparatus (SCBA)",
      "facepiece": "Helmet/hood",
      "mode": "Pressure-demand or other positive-pressure",
      "apf": "10,000",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-pressure-demand-or-other-positive-pressure-helmet-hood-self-contained-breating-apparatus-scba",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-pressure-demand-or-other-positive-pressure-helmet-hood-self-contained-breating-apparatus-scba/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... | 2. Powered Air-Purifying Respirator (PAPR) | | 50 | 1,000 | 4 25/1,000 | 25 | 3. Supplied-Air Respirator (SAR) or Airline | | | | | | Respirator | | | | | | Demand mode | ...... | 10 | 50 | ...... | ...... | Continuous flow mode | ...... | 50 | 1,000 | 4 25/1,000 | 25 | Pressure-demand or other positive-pressure | ...... | 50 | 1000 | ...... | ...... | mode | | | | | | 4. Self-Contained Breating Apparatus (SCBA) | | | | | | Demand mode | ...... | 10 | 50 | 50 | ...... | Pressure-demand or other positive-pressure | ...... | | 10,000 | 10,000 | ...... |",
      "verified_fields": [
        "apf",
        "mode",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    },
    {
      "respirator_class": "Air-Purifying Respirator",
      "facepiece": "Quarter mask",
      "apf": "5",
      "jurisdiction": "Title 8, Section 5144",
      "id": "title-8-section-5144-quarter-mask-air-purifying-respirator",
      "url": "https://referencesource.org/respirator-assigned-protection-factors/title-8-section-5144-quarter-mask-air-purifying-respirator/",
      "source": "https://www.dir.ca.gov/title8/5144.html",
      "source_quote": "Loose- | | Quarter | | Full | | fitting | Type of respirator 1,2 | mask | Half mask | facepiece | Helmet/hood | facepiece | 1. Air-Purifying Respirator | 5 | 3 10 | 50 | ...... | ...... |",
      "verified_fields": [
        "apf",
        "respirator_class"
      ],
      "derived_fields": [
        "facepiece",
        "jurisdiction"
      ]
    }
  ]
}