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Type of
respirator
Quarter
mask
Half mask
Full
facepiece
Helmet/
Hood
Loose-fitting
facepiece
Demand mode
10
50
Continuous flow
mode
50
1,000
25/1,000
25
Pressure-demand
or other positivepressure mode
50
1,000
10
50
50
10,000
10,000
SAR
SCBA
Demand mode
Pressure-demand
or other positivepressure mode
Respirator Type Pros and Cons
Respirator
Type
Hoseline/Airline SAR
SCBA
Pros
Used above IDLH with an escape pack
Offers the highest APF
Used in oxygen-deficient atmosphere with escape pack
Not contaminant-specific
Not contaminant-specific
Breathing times are relatively
predictable
Low breathing resistance
Lightweight
Can be used in oxygendeficient, IDLH, and unknown
atmospheres
Air supply is carried on the
user’s body
Can access remote air supplies
via a hoseline connection
Cons
Hoseline can interfere with mobility
Cost
Hoseline can never be longer than 300 ft. from the last
high pressure connection
Requires a lot of support
equipment
May need to be used with a full facepiece and an
auxiliary SCBA
Can have a very limited
use duration under certain
circumstances
Tends to be a lot heavier and
bulkier than SAR
Usually requires more training
than SAR
233 General Patton Ave. Mandeville, LA 70471 | 1.800.892.8179 | www.pecsafety.com
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Hydrogen Sulfide End User
Assigned Protection Factors