Allegro 9533 Axial Blower 0.33 Hp 115V 8 Inch

Product Description

The ALLEGRO 9533 is a single-speed AC axial blower designed for ventilation applications in confined spaces, tunnels, construction sites, and industrial work areas. Rated at 0.33 horsepower and operating on 115 volts, it delivers 831 cubic feet of airflow per minute through an 8-inch inlet and outlet. The blower features a polyethylene casing and polypropylene blades, keeping the unit lightweight relative to its airflow capacity while resisting corrosion in damp or chemically active environments. It is installed by industrial safety technicians, ventilation contractors, and confined-space entry crews who need reliable air movement in temporary or permanent ducted setups.

The 9533 is suited for residential and commercial construction ventilation, utility vaults, manholes, tunnels, and any application requiring forced fresh-air supply or exhaust through flexible or rigid ductwork. The 8-inch inlet and outlet diameter makes it compatible with standard-size ventilation ducting commonly used in confined-space entry operations. This unit is not rated explosion-proof and should not be used in atmospheres containing flammable gases or vapors.

Key Features

• 831 cubic feet per minute airflow output for effective confined-space ventilation
• 0.33 HP motor operating on 115 volts standard AC power
• 8-inch inlet and outlet diameter fits standard ventilation ducting
• Polyethylene casing resists corrosion and impact in field conditions
• Polypropylene blades provide durability in humid or mildly corrosive environments
• Single-speed operation simplifies setup and reduces maintenance points

Compatibility

Designed for use with standard 8-inch diameter flexible or rigid ventilation ducting in confined-space and construction ventilation systems. Not rated for explosion-proof or classified hazardous-location installations.

Installation Notes

Installation should be performed by qualified ventilation or safety personnel familiar with confined-space entry requirements and applicable OSHA ventilation standards. Disconnect power at the source before making any electrical connections and verify the supply circuit matches the 115-volt rating of the unit. Secure duct connections at the inlet and outlet to prevent air bypass and ensure adequate airflow delivery. Do not operate this blower in atmospheres with flammable, explosive, or highly corrosive gases, as it is not explosion-proof rated.