Allegro 12" AC Air Bag — All-in-One Confined Space Ventilation Blower System
The Allegro 9535-12 12" AC Air Bag is a metal axial blower system designed for confined space ventilation in construction, industrial, and manufacturing environments. The blower and ducting are integrated into a heavy-duty reinforced polyester bag, creating a self-contained, all-in-one unit that eliminates the need to unpack components before use. Zippered ends allow the blower to operate directly from within the bag, while separate zipper openings accommodate the power cord inlet and duct outlet. UL Recognized and CSA Certified to CSA Standard C22.2 No. 113, this system is built to meet regulatory requirements for confined space entry operations.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | ALLEGRO |
| Item # | 9535-12 |
| UPC | 741851560861 |
| Weight | 35 lbs. (with 15' ducting) / 41 lbs. (with 25' ducting) |
| Country of Origin | China |
| Applications | Construction, Industrial, Manufacturing, Confined Space |
| Blower Size | 12" (30.4 cm) axial blower |
| Motor | 1/2 HP |
| Power | 120V AC, 60 Hz |
| Fan | Polypropylene seven-blade |
| Housing | Steel / powder-coated |
| Speed Switch | 2-speed, molded into carry handle |
| Free Air CFM (High Speed) | 1,840 CFM |
| 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 |
| Certifications | UL Recognized, CSA Certified (CSA Standard C22.2 No. 113) |
Available Items
| Item # | Description | Ducting Length | Weight |
|---|---|---|---|
| 9535-12 | 12" AC Air Bag with 15' Ducting | 15' (4.57 m) | 35 lbs. |
| 9535-12L | 12" AC Air Bag with 25' Ducting | 25' (7.62 m) | 41 lbs. |
Unlike blower systems that require separate storage cases or loose ducting management, the Air Bag integrates the blower, ducting, and storage into a single reinforced polyester bag — reducing setup time and the risk of leaving components behind on the job site. The 2-speed motor and steel powder-coated housing offer durability and operational flexibility that plastic-housing alternatives cannot match in demanding environments.
Key Features & Benefits
All-in-One Integrated System
The blower and ducting are housed together in a single heavy-duty polyester bag, eliminating the need to manage separate components. This reduces setup time and ensures everything needed for ventilation arrives at the job site together.
Zippered Ends for In-Bag Operation
Zippered openings at both ends allow the blower to run without removing it from the bag, and provide dedicated access points for the power cord inlet and duct outlet. This design keeps the system organized and ready to deploy immediately.
2-Speed Switch Molded into Carry Handle
The two-speed control is integrated directly into the carry handle, allowing operators to adjust airflow without setting the unit down or reaching for a separate control. This is particularly useful when fine-tuning ventilation in confined spaces with varying air volume requirements.
Steel / Powder-Coated Housing
The metal housing and grill provide greater durability than plastic alternatives, resisting impact and wear in demanding construction and industrial environments. Powder coating adds corrosion resistance for extended service life.
Dual Carry Options
Both a carry handle and a shoulder strap are included, giving workers flexibility when transporting the unit across a job site. This is especially valuable when navigating confined space entry points or moving between work areas.
UL Recognized and CSA Certified
Certification to CSA Standard C22.2 No. 113 confirms the blower meets recognized safety standards for fans and ventilators. This supports compliance with OSHA confined space entry requirements and gives safety managers confidence in the equipment.
Common Applications
Confined Space Entry Ventilation
Provides fresh air supply or exhaust ventilation for workers entering manholes, vaults, tanks, and other permit-required confined spaces prior to and during entry.
Construction Site Ventilation
Moves air through enclosed work areas such as tunnels, pipelines, and below-grade structures where natural ventilation is insufficient.
Industrial Facility Maintenance
Supports ventilation of hoppers, silos, vessels, and ductwork during inspection, cleaning, or repair operations in manufacturing and processing facilities.
Shipyard and Refinery Work
Delivers reliable airflow in heavy industrial environments where durable metal construction is required and plastic blowers may not withstand the conditions.
Compatible Materials
- Standard (non-hazardous) confined space atmospheres
- Non-explosive environments (standard AC electric motor — not explosion-proof rated)
- Compatible with 12" diameter flexible ducting (single-ply vinyl/polyester PVC coated, included)
- Suitable for use with Allegro 12" MVP (Multi-Vent Piece) blower systems (see Order No. 9520-3512M)
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 accommodate the power cord and duct connections.
Q: What ducting lengths are available with this system?
A: The 9535-12 includes 15 feet (4.57 m) of ducting and weighs 35 lbs. The 9535-12L variant includes 25 feet (7.62 m) of ducting and weighs 41 lbs.
Q: Is this blower suitable for use in hazardous or explosive atmospheres?
A: No. The 9535-12 is a standard AC electric blower and is not explosion-proof rated. For hazardous environments, Allegro offers separate explosion-proof metal axial blower models.
Q: What is the free-air airflow rating of this blower?
A: The 12" AC Air Bag delivers 1,840 CFM free air at high speed.
Q: Can this unit be used with an MVP (Multi-Vent Piece) system?
A: Yes. The 12" AC Air Bag is compatible with the Allegro 12" AC Air Bag Blower System with MVP (Order No. 9520-3512M).
Q: What certifications does this blower carry?
A: The 9535-12 is UL Recognized and CSA Certified to CSA Standard C22.2 No. 113 (Fans and Ventilators).