Respirator Type |
Comments |

Air-purifying respirator (APR)1
- Disposable
- Half mask
- Negative-pressure
- Assigned Protection Factor (APF): 10
- Fit Testing Required? Yes
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Air-purifying respirator (APR), disposable
Key Features
- Usually half mask, negative-pressure particulate respirator
- Inspiratory effort of wearer draws air through filter
- Filter comprises all or a significant portion of the facepiece
- Airborne particles removed as inspired air passes through filter
- NIOSH-certified CBRN air-purifying respirators with HEPA or P-100 filters provide the minimum acceptable level of protection against inhalation of particles for personnel working in environments likely to be contaminated with radioactive materials
Advantages
- Light weight
- Does not restrict mobility
- Low cost (compared to other respirators)
Disadvantages
- Does not supply oxygen (cannot be used in low oxygen environments)
- May only be used when air contaminant level is below the concentration limits of the filter
- Fit testing required
- Some contaminated air will leak into facepiece
- Half mask models do not provide adequate eye protection
- Full facepiece models may fog up during use
- Communication can be difficult
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Air-purifying respirator (APR)1
- Reusable
- Elastomeric
- Half mask
- Negative-pressure
- Assigned Protection Factor (APF): 10
- Fit Testing Required? Yes
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Air-purifying respirator (APR), reusable
Key Features
- Elastic facepiece worn over mouth and nose
- Inspiratory effort of wearer draws ambient air through filter(s) before air is inhaled
- Provides increased protection when used with filters, cartridges, or canisters that remove specific contaminants
Advantages
- Comparatively light weight
- Does not restrict mobility
- Relatively low cost (compared to other respirators)
Disadvantages
- Does not supply oxygen (cannot be used in low oxygen environments)
- May only be used when air contaminant level is below the concentration limits of the filter(s)
- Fit testing required
- Some contaminated air can leak into facepiece
- Half mask models do not provide adequate eye protection
- Communication can be difficult
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Air-purifying respirator (APR)1
- Reusable
- Elastomeric
- Full facepiece
- Negative-pressure
- Assigned Protection Factor (APF): 50
- Fit Testing Required? Yes
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Air-purifying respirator (APR), reusable
Key Features
- Elastic facepiece covers entire face
- Inspiratory effort of wearer draws ambient air through filter(s) before air is inhaled
- Provides increased protection when used with filters, cartridges, or canisters that remove specific contaminants
Advantages
- Comparatively light weight
- Does not restrict mobility
- Provides both respiratory and eye protection
Disadvantages
- Does not supply oxygen (cannot be used in low oxygen environments)
- May only be used when air contaminant level is below the concentration limits of the filter(s)
- Fit testing required
- Some contaminated air can leak into facepiece
- Communication can be difficult
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Powered air-purifying respirator (PAPR)1
- Loose-fitting
- Assigned Protection Factor (APF): 25
- Fit Testing Required? No
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Powered air-purifying respirator (PAPR)
Key Features
- Battery powered blower forces contaminated ambient air through air-purifying filters
- Purified air delivered under positive-pressure to facepiece mask, helmet, or hood
- Worn when disposable and reusable half mask negative-pressure air-purifying respirators do not provide adequate protection
Advantages
- Provides greater protection than non-powered negative-pressure air-purifying respirators
- More comfortable to wear and to breathe compared to non-powered negative-pressure air-purifying respirators
- Air delivery to facepiece mask, helmet, or hood ensures that leakage of contaminated air is usually outward
- Fit testing not required
- Various chemical cartridges or canisters available to eliminate chemicals including organic vapors and acid gases
- Provides both respiratory and eye protection
Disadvantages
- Bulky and noisy
- Battery dependent
- Is not a true positive-pressure device (i.e., some leakage of contaminated air into facepiece mask, helmet, or hood can occur)
- Communication can be difficult
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Powered air-purifying respirator (PAPR)1
- Hooded
- Assigned Protection Factor (APF): 25
- Fit Testing Required? No
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Powered air-purifying respirator (PAPR)
Key Features
- Battery powered blower forces contaminated ambient air through air-purifying filters
- Purified air delivered under positive-pressure to facepiece mask, helmet, or hood
- Worn when disposable and reusable half mask negative-pressure air-purifying respirators do not provide adequate protection
Advantages
- Provides greater protection than non-powered negative-pressure air-purifying respirators
- More comfortable to wear and to breathe compared to non-powered negative-pressure air-purifying respirators
- Air delivery to facepiece mask, helmet, or hood ensures that leakage of contaminated air is usually outward
- Fit testing not required
- Various chemical cartridges or canisters available to eliminate chemicals including organic vapors and acid gases
- Provides both respiratory and eye protection
Disadvantages
- Bulky and noisy
- Battery dependent
- Is not a true positive-pressure device (i.e., some leakage of contaminated air into facepiece mask, helmet, or hood can occur)
- Communication can be difficult
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Supplied-air respirator (SAR)1
- Full facepiece
- Assigned Protection Factor (APF): 1,000
- Fit Testing Required? Yes

Auxiliary escape respirator1
- Assigned Protection Factor (APF): 10,000 (when used in "escape" mode)
- Fit Testing Required? Yes
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Supplied-air respirator (SAR)
Key Features
- Compressed air delivered from a stationary source (located away from contaminated area) to a half or full facepiece mask via a hose
- Worn when negative-pressure and powered air-purifying respirators do not provide adequate protection
Advantages
- Provides high level respiratory protection
- Provides positive pressure to mask so almost all leakage is outward
- Less bulky and can be used for longer periods than self-contained breathing apparatus
- May be easier for hospital personnel to use
- Provides both respiratory and eye protection
Disadvantages
- Length of air hose may limit mobility
- Air hose may be a trip hazard
- Clean source of breathing air required
- Fit testing required
- Immediately operable emergency escape respirator, escape hood, or escape mask is required
- Communication can be difficult
Auxiliary escape respirator, escape hood, or escape mask
Key Features
- Carried or worn in case of SAR failure
- Protects wearer from breathing harmful gases, vapors, fumes, and dusts for a limited amount of time in emergency situations
- Can be designed as an air-purifying escape respirator (APER) or a self-contained breathing apparatus (SCBA) type respirator
- APERs have a filter canister mounted on a hood to filter contaminants before air is inhaled
- SCBA type escape respirators have an attached source of breathing air and a hood that provides a barrier against contaminated outside air
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Self-contained breathing apparatus (SCBA)1
- Full facepiece
- Assigned Protection Factor (APF): 10,000
(in pressure demand mode)
- Fit Testing Required? Yes
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Self Contained Breathing Apparatus (SCBA)
Key Features
- Provides very pure, dry compressed air to full facepiece mask via a hose
- Air is exhaled to environment
- By law, must be worn whenever entering environments immediately dangerous to life and health (IDLH) or when information is inadequate to rule out IDLH atmosphere
Advantages
- Provides highest level of respiratory protection
- Several different types available depending on need
- Improved mobility over Supplied-Air Respirators
- Provides both respiratory and eye protection
Disadvantages
- Heavy to wear
- Limited oxygen supply limits duration of use
- Fit testing required
- Communication can be difficult
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