MSA 10249971 is a NIOSH-approved PremAire pressure-demand Type C supplied-air respirator configured with a medium G1 full facepiece, rubber head harness, five-minute 3AL emergency escape cylinder, right-hip mounting and carrying case. The escape cylinder provides an auxiliary self-contained air supply for emergency egress if the primary airline supply is interrupted.
MSA 10249971 PremAire Supplied-Air Respirator with 5-Minute Escape Cylinder
The MSA PremAire 10249971 is a full-face, pressure-demand Type C supplied-air respirator designed for industrial respiratory protection and confined-space applications. This configuration combines a medium MSA G1 facepiece with a rubber head harness, a five-minute 3AL emergency escape cylinder, right-hip cylinder mounting and a carrying case.
During normal operation, breathing air is supplied through an approved external airline system. The auxiliary cylinder is intended to provide emergency escape air if the primary supplied-air source is interrupted. It is not intended to provide five minutes of routine working air.
The PremAire platform incorporates a waist-mounted manifold for flexibility and a lightweight mask-mounted regulator that responds to the user’s breathing demand. The right-hip cylinder position keeps the escape supply accessible while helping reduce interference during movement through industrial and confined work areas.
This configuration is listed by MSA for confined-space, IDLH and industrial respiratory-protection applications. Use in an IDLH atmosphere is permitted only when the respirator is assembled, supplied, maintained and used in its complete NIOSH-approved configuration and all applicable workplace requirements are satisfied.
Included Configuration
• MSA PremAire supplied-air respirator system
• Medium MSA G1 full facepiece
• Rubber facepiece head harness
• Five-minute 3AL emergency escape cylinder
• Right-hip cylinder mounting configuration
• Carrying case
• MSA manufacturer part number 10249971
Key Features
• Full-face pressure-demand operation
• Type C supplied-air respirator
• Auxiliary self-contained escape-air supply
• NIOSH-approved configuration
• Medium low-profile MSA G1 facepiece
• Rubber facepiece harness
• Patented waist-mounted manifold
• Lightweight mask-mounted regulator
• Right-hip escape-cylinder placement
• Five-minute escape-cylinder rating
• Carrying case included
• Designed for use with an approved external breathing-air source
• Minimum order quantity of one
Recommended Applications
• Confined-space operations
• Industrial respiratory protection
• Oil and gas operations
• Utilities
• Nuclear facilities
• Processing and manufacturing
• Government and emergency-response applications
• IDLH environments when used in the complete approved configuration
Important Escape-Cylinder Notice
The five-minute designation refers to the rated auxiliary escape-air supply. It is intended for emergency egress if the primary supplied-air source fails or is disconnected.
Five minutes must not be treated as a guaranteed evacuation time. Actual air consumption depends on factors including user breathing rate, workload, cylinder condition, fill pressure and environmental conditions. Escape planning must be based on the workplace hazard assessment, MSA instructions and the employer’s respiratory-protection program.
Required System Verification
Before ordering or using this system, confirm the required MSA-approved air-supply hose, quick-disconnect fitting, breathing-air source and any site-specific accessories. Only components included in the applicable NIOSH-approved assembly may be used.
Respiratory Protection Warning
Respirator selection and use must be supervised by a qualified respiratory-protection program administrator. Users must receive the required medical evaluation, training and fit testing before workplace use.
Use only in accordance with the current MSA instructions, approval label and applicable regulations. The employer must evaluate the respiratory hazards and provide breathing air of the required quality, quantity and pressure.
Never modify the respirator or substitute unapproved cylinders, hoses, fittings, regulators, facepieces or replacement components.
FAQ CONTENT
What is the MSA 10249971?
MSA 10249971 is a complete PremAire pressure-demand Type C supplied-air respirator configuration with a medium G1 facepiece, rubber head harness, five-minute 3AL escape cylinder, right-hip mount and carrying case.
What does the five-minute cylinder rating mean?
The five-minute cylinder is an auxiliary emergency escape supply. It is intended to support egress if the primary airline supply is interrupted. It is not intended to provide five minutes of routine working air.
Is five minutes of escape time guaranteed?
No. Air consumption varies with breathing rate, physical exertion, cylinder condition, fill pressure and environmental conditions. A qualified safety professional must determine whether the rated escape supply is appropriate for the planned evacuation route.
Can MSA 10249971 be used in an IDLH atmosphere?
MSA lists the PremAire system as suitable for IDLH environments when equipped with the escape-cylinder option. It must be used in its complete NIOSH-approved configuration and as part of a compliant respiratory-protection and IDLH work program.
What facepiece is included?
This configuration includes a medium MSA G1 full facepiece with a rubber head harness.
Where is the escape cylinder mounted?
The cylinder is configured for mounting at the user’s right hip.
Does the system include a carrying case?
Yes. MSA identifies a carrying case as part of the 10249971 configuration.
Does the system include an external breathing-air source?
The product description does not identify a compressor, cascade system or other external breathing-air source as included. Confirm the required air source, approved airline hose and quick-disconnect fittings before ordering.
Can any airline hose or fitting be used?
No. Use only hoses, fittings and other components permitted by the applicable MSA instructions and NIOSH approval. Substituting an unapproved component can invalidate the approved respirator configuration.
Does the wearer require fit testing?
Yes. The medium tight-fitting G1 facepiece requires the applicable medical evaluation, training and fit testing before occupational use.
What breathing-air quality is required?
The employer must provide breathing air that satisfies applicable atmosphere-supplying respirator requirements and the current MSA instructions. In the United States, OSHA requires compressed breathing air to meet at least Grade D requirements.
Is this an air-purifying respirator?
No. This product is sold as a supplied-air respirator with an auxiliary escape cylinder. Do not confuse it with an APR or PAPR configuration simply because the broader G1 facepiece platform supports other separately approved applications.
