Allegro 12" Axial AC Plastic Blower with Canister & Ducting — High-Output Confined Space Ventilation
The Allegro 9543-15 is a 1 HP, 12-inch axial AC blower engineered for high-volume air movement in confined spaces, construction sites, industrial facilities, and manufacturing environments. Built with a lightweight, corrosion-, UV-, and chemical-resistant polyethylene housing in safety orange, this unit delivers up to 1,842 CFM of free-air flow while remaining quiet enough for extended jobsite use. The complete system includes a storage canister and 15 feet of PVC-coated vinyl and polyester ducting, and is certified to UL, CSA C22.2 No. 113, and CE standards. It is available in both US and international wiring configurations to support a wide range of deployment scenarios.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | ALLEGRO |
| Item # | 9543-15 |
| UPC | 741851954318 |
| Blade/Housing Diameter | 12" |
| Motor | 1 HP |
| Voltage / Frequency | 115V–230V AC, 50/60 Hz |
| Airflow — Free Air | 1,842 CFM |
| Airflow — One 90° Bend | 1,004 CFM |
| Airflow — Two 90° Bends | 933 CFM |
| Blower Weight (unit only) | 28 lbs. |
| System Weight (with canister & 15' ducting) | 43 lbs. |
| Housing Material | Polyethylene |
| Color | Safety Orange |
| Ducting Included | 15' (4.57 m) PVC coated vinyl and polyester |
| Ducting Options | 15' (4.57 m) or 25' (7.62 m) |
| Wiring Configurations | US and International |
| Applications | Construction, Industrial, Manufacturing, Confined Space |
| Certifications | UL Recognized, CSA Certified (C22.2 No. 113), CE Certified |
| Country of Origin | China |
| Shipping Weight | 50 lbs. |
Available Items
| Item # | Description | Configuration |
|---|---|---|
| 9543-15 | 12" Axial AC Plastic Blower with Canister & 15' Ducting | 43 lbs. — 115V–230V AC (CSA Certified) |
| 9543-15E | 12" Axial AC Plastic Blower with Canister & 15' Ducting (220V AC/50 Hz) | 43 lbs. — Does NOT meet CSA C22.2 No. 113 requirements |
| 9543-25 | 12" Axial AC Plastic Blower with Canister & 25' Ducting | 49 lbs. — 115V–230V AC (CSA Certified) |
| 9543-25E | 12" Axial AC Plastic Blower with Canister & 25' Ducting (220V AC/50 Hz) | 49 lbs. — Does NOT meet CSA C22.2 No. 113 requirements |
| 9543 | 12" Axial AC Plastic Blower (blower only, no canister or ducting) | — |
Unlike metal-housing axial blowers, the polyethylene construction of the 9543-15 resists corrosion, UV degradation, and chemical exposure without adding unnecessary weight — making it better suited for long-term outdoor or harsh-environment deployment. The integrated quick-connect canister system and molded carry handles eliminate the need for additional tools or accessories during setup and breakdown, reducing non-productive time on the job.
Key Features & Benefits
High-Output 1 HP Motor
Delivering 1,842 CFM of free-air flow, this blower moves a substantial volume of air even through ducted configurations — 1,004 CFM through one 90° bend and 933 CFM through two 90° bends. For contractors ventilating manholes, tunnels, or enclosed work areas, this output level supports effective air exchange without requiring a larger, heavier unit.
Lightweight Polyethylene Housing
The blower and canister assembly are constructed from polyethylene that is resistant to corrosion, UV radiation, and chemicals, keeping the unit durable across demanding jobsite conditions. At 28 lbs. for the blower alone and 43 lbs. as a complete system with canister and 15' ducting, it is manageable for a single worker to transport and position.
Quick-Connect Canister System — Tools-Free Attachment
The quick-connect clipping system allows workers to attach the canister to either the input side for extraction or the output side for ventilation without any tools. This dual-mode capability gives crews flexibility to configure the blower for the specific ventilation requirement of each confined space entry.
Integrated Ducting Storage
The 15' (or optional 25') PVC-coated vinyl and polyester ducting stores directly within the canister housing, keeping the system compact and organized between uses. This eliminates the need for separate storage bags or cases and speeds up deployment and pack-out on the job.
Molded Carry Handles
Both the blower and canister housing feature carry handles molded directly into the polyethylene structure. This design detail supports safe, ergonomic transport across uneven terrain or up and down ladders without requiring additional lifting equipment.
Triple Certification — UL, CSA, CE
The 9543-15 is UL Recognized, CSA Certified to C22.2 No. 113 (Fans and Ventilators), and CE Certified, meeting the compliance requirements for use across North American and international job sites. The E-version (220V/50 Hz) variants are available for international wiring requirements, though they do not carry CSA C22.2 No. 113 certification.
Bottom Enclosure for Electrical Component Protection
A bottom enclosure protects the motor and electrical components from debris, moisture, and incidental contact during operation and transport. This design feature contributes to the unit's long service life in construction and industrial environments.
Common Applications
Confined Space Ventilation
The 9543-15 is designed specifically for confined space entry operations, supplying fresh air or exhausting hazardous gases from manholes, vaults, tanks, tunnels, and similar enclosed environments prior to and during worker entry.
Construction Site Air Supply
On active construction sites, the blower can be used to ventilate enclosed structures, basements, or partially completed buildings where natural airflow is insufficient for worker safety or comfort.
Industrial and Manufacturing Facilities
In industrial and manufacturing settings, the unit supports ventilation of hoppers, silos, storage bins, vessels, and ductwork where periodic confined space entry is required for maintenance or inspection.
Extraction / Exhaust Mode
By attaching the canister to the input side of the blower, the system operates in extraction mode to pull contaminated or stale air out of a confined space, making it versatile for both supply and exhaust ventilation strategies.
Portable Jobsite Ventilation
The lightweight construction and integrated storage system make this blower practical for contractors who move between multiple job sites, requiring a complete ventilation solution that sets up and breaks down quickly.
Compatible Materials
- PVC coated vinyl and polyester ducting (15' or 25' included)
- Compatible with Allegro inline axial booster blowers for extended duct distances
- Suitable for use in non-hazardous environments (for hazardous/explosive atmospheres, see Allegro explosion-proof blower models)
Product Documents
- Product Sheet — Allegro 12" Axial AC Plastic Blower with Canister & Ducting
- Allegro Ventilation Blowers Linecard
Frequently Asked Questions
Q: Can this blower be used for both supply ventilation and exhaust/extraction?
A: Yes. The quick-connect canister attaches to the output side of the blower for supply ventilation or to the input side for powerful extraction, giving workers flexibility for either ventilation strategy without additional equipment.
Q: What is the airflow output of the 9543-15 when ducting is used?
A: Free-air output is 1,842 CFM. With one 90° bend in the duct run, output is 1,004 CFM. With two 90° bends, output is 933 CFM.
Q: Is the 9543-15E (220V) version CSA certified?
A: No. The E-version (220V AC/50 Hz) is wired for international use but does not meet CSA C22.2 No. 113 requirements. The standard 9543-15 (115V–230V AC) is CSA Certified, UL Recognized, and CE Certified.
Q: Is this blower suitable for use in hazardous or explosive atmospheres?
A: No. The 9543-15 is rated for non-hazardous environments only. For hazardous locations requiring explosion-proof equipment, Allegro offers separate explosion-proof blower models (e.g., 9548 series).
Q: What ducting length options are available?
A: The 9543-15 includes 15' (4.57 m) of PVC-coated vinyl and polyester ducting. A 25' (7.62 m) ducting version is available as item 9543-25, weighing 49 lbs. complete.
Q: Can this blower be used with an inline booster blower for longer duct runs?
A: Yes. Per Allegro's product line documentation, axial blowers can be used with in-line axial booster blowers as a velocity accelerator for longer duct distances.