Allegro 8" AC Air Bag — All-in-One Confined Space Ventilation Blower System
The Allegro 9535-08 is an 8" axial AC metal blower system with ducting integrated into a heavy-duty reinforced polyester storage bag, creating a self-contained, all-in-one ventilation unit purpose-built for confined space entry operations. Designed for construction, industrial, and manufacturing environments, the Air Bag system eliminates the need to remove the blower from the bag during operation, reducing setup time and handling on the job site. The unit ships with either 15 ft. or 25 ft. of single-ply vinyl/polyester PVC-coated ducting and is UL Recognized and CSA Certified to CSA Standard C22.2 No. 113, meeting the compliance requirements demanded by safety-conscious contractors and site supervisors.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | ALLEGRO |
| Item # | 9535-08 |
| UPC | 741851953588 |
| Country of Origin | China |
| Blower Size | 8" (20.3 cm) axial blower |
| Motor | 1/4 HP |
| Power | 120V, 60 Hz |
| Free Air CFM (High Speed) | 760 CFM |
| Fan | Polypropylene seven-blade |
| Housing & Grill | Steel / powder-coated |
| Switch | 2-speed molded-in carry handle switch |
| Ducting Material | Single-ply lightweight vinyl/polyester PVC coated |
| Ducting Color | Yellow with black wear-strip and integrated nylon attachment strap on one end |
| Ducting Temperature Rating | 180°F (82.2°C) |
| Bag Material | Heavy-duty reinforced polyester with shoulder strap |
| Certifications | UL Recognized, CSA Certified (CSA Standard C22.2 No. 113) |
| Applications | Construction, Industrial, Manufacturing, Confined Space |
Available Items
| Item # | Description | Ducting Length | Weight |
|---|---|---|---|
| 9535-08 | 8" AC Air Bag with 15' Ducting | 15 ft. (4.57 m) | 25 lbs. |
| 9535-08L | 8" AC Air Bag with 25' Ducting | 25 ft. (7.62 m) | 28–29 lbs. |
Unlike traditional canister-based blower systems that require the blower to be removed for operation or storage, the Air Bag design keeps the blower housed within the bag at all times — zippered openings handle all inlet, outlet, and cord access without disassembly. This integrated approach reduces the number of loose components on the job site and speeds up deployment compared to separate blower-and-canister configurations.
Key Features & Benefits
All-in-One Bag System
The metal blower and ducting are permanently housed within a heavy-duty reinforced polyester bag, eliminating the need to manage separate components. Contractors can deploy the system directly from the bag, reducing setup time and the risk of misplaced parts on busy job sites.
Zippered Ends for In-Bag Operation
Zippered openings at both ends of the bag allow the blower to operate without ever being removed from the bag. Separate zipper openings accommodate the power cord plug/inlet and the duct outlet, keeping the system fully functional while contained.
2-Speed Molded-In Carry Handle Switch
The carry handle integrates a 2-speed switch, allowing operators to adjust airflow output without reaching for a separate control. This design keeps the control point at the natural grip location, improving ease of use during positioning and operation.
Dual Carry Options
Both a carry handle and a shoulder strap are included, giving workers flexibility when transporting the unit across a job site. The shoulder strap is particularly useful when navigating ladders, stairs, or confined access points where a free hand is needed.
Steel/Powder-Coated Housing
The blower housing and grill are constructed from powder-coated steel, providing durability in demanding construction and industrial environments. Metal construction offers greater resistance to impact and wear compared to plastic-housing alternatives.
Temperature-Resistant Ducting
The single-ply vinyl/polyester PVC-coated ducting is rated to 180°F (82.2°C), making it suitable for use in elevated-temperature environments. The yellow color with black wear-strip improves visibility and durability at the duct's most abrasion-prone contact points.
UL Recognized & CSA Certified
The unit carries UL Recognition and CSA Certification to CSA Standard C22.2 No. 113 (Fans and Ventilators), satisfying the compliance requirements commonly specified in confined space entry programs and site safety plans.
Common Applications
Confined Space Entry Ventilation
Provides fresh air supply or exhaust ventilation for workers entering manholes, vaults, tanks, tunnels, and other permit-required confined spaces in compliance with OSHA ventilation requirements.
Construction Site Ventilation
Delivers airflow to enclosed or partially enclosed construction areas where natural ventilation is insufficient, including below-grade work zones and interior structural spaces.
Industrial Facility Maintenance
Supports maintenance operations in industrial environments such as pipelines, silos, hoppers, and vessels where temporary ventilation is required before and during worker entry.
Manufacturing Environment Air Movement
Used in manufacturing facilities to ventilate enclosed work areas, equipment enclosures, or storage bins during inspection, cleaning, or repair operations.
Compatible Materials
- Ducting: Single-ply lightweight vinyl/polyester PVC-coated flexible duct (yellow with black wear-strip)
- Compatible with standard 8" diameter duct fittings and connectors
- Suitable for use with Allegro 8" MVP (Multi-Vent Piece) systems (see system order no. 9520-358M)
Product Documents
Frequently Asked Questions
Q: Can the blower be operated while still inside the bag?
A: Yes. The bag is designed with zippered ends specifically to allow blower operation without removing the unit from the bag. Separate zipper openings handle the power cord inlet and duct outlet.
Q: What ducting lengths are available for this model?
A: The 9535-08 includes 15 ft. (4.57 m) of ducting at 25 lbs. The 9535-08L variant includes 25 ft. (7.62 m) of ducting at approximately 28–29 lbs.
Q: What is the airflow output of the 8" AC Air Bag?
A: The unit delivers 760 CFM free air at high speed (120V, 60 Hz).
Q: Is this unit certified for use in North American job sites?
A: Yes. The 8" AC Air Bag is UL Recognized and CSA Certified to CSA Standard C22.2 No. 113 (Fans and Ventilators).
Q: Is this unit suitable for use in hazardous (explosive) atmospheres?
A: No. The 9535-08 is a standard AC electric blower and is not explosion-proof rated. For hazardous environments, Allegro offers separate explosion-proof blower models.
Q: Can this blower be used with an MVP (Multi-Vent Piece) system?
A: Yes. Allegro offers an 8" AC Air Bag Blower System with 8" MVP under order number 9520-358M, which pairs this blower with a multi-vent distribution piece for more complex ventilation layouts.