Industrial upblast and hooded roof propeller fan ventialtors. Sales of power roof and wall ventilators for air exhaust and make-up, as well as replacement props.
Buffalo Fan Company

Canada Blower Co. has developed Low Profile Positive Pressure Ventilators that have been designed to fit in tight compartments and small spaces without sacrificing performance or features. These compact ventilation blowers are available is both gasoline driven configuration and with 115/230V single phase electric motor:
The Positive Pressure Blower is a high volume fan use to pressurize a burning structure, in case of fire, in order to force the smoke out. Positive Pressure Blowers are portable, gasoline powered fans, most of which utilize a 5.5 horsepower engine.
The theory of positive pressure ventilation is based on the principal of even pressure distribution. Once a structure is pressurized, air and smoke can be forced out through any opening (similar to escaping from an inflated balloon).
Electric smoke ejectors (negative pressure ventilation) can be used for smoke removal but this has proven to be inferior to positive pressure ventilation:
What makes Positive Pressure Ventilation superior to negative pressure ?
* The risk of injury from the engaged structure is reduced while placing the fan in operation.
* Positive pressure ventilation is faster to set up and requires fewer personnel.
* The Positive Pressure Blower has a self contained power source, while electric fans require cords and adaptors.
* Smoke and heat is removed from all levels of the structure unlike negative pressure which can result in localized extraction.
* Quicker results. After initial knockdown, positive pressure ventilation can be initiated and will show immediate improvements in the interior conditions.
* It allows replacement of contaminants with vital cooler, cleaner air - especially in sealed or windowless buildings. It's also very effective in large and compartmentalized buildings, warehouses, schools, etc.
* Quick results allow firefighters faster entry due to lower heat levels and improved visibility.
The following criteria should be considered for effective use of Positive Ventilation:
- The cone of air must cover the intake opening.
The fan must be placed the correct distance from the structure such as that the cone of air forms a seal around the opening.

- The size and location of the discharge is important.
The discharge, if at all possible should be as high and far away from the intake as is practical. The discharge size should be between 3/4 to 1/2 times the intake. This may not always be possible as the fire may have already dictated discharge locations and sizes; but whenever there is a choice, the above criteria should be used.

- It is important to control the air flow between the intake and discharge.
Positive pressure ventilation can move air long distances if proper control is maintained by opening and closing doors, windows, etc. It is important that firefighters understand not to open the structure too much: ie breaking windows, etc.
The standard features of Canada Blower Positive Pressure Ventilators include: fold down "T" handle; 8" pneumatic tires with full width axle; a "tilt and lock" device that allows the unit to be angled 20 degrees up or down with infinite positions in between; sturdy and light 1 inch wrap around frame. Explosion proof electric motors are available as drivers too.
The optimum ventilator placement distance on most 6' 6" doors is about five to six feet away. If placement is too close, the seal won't be achieved. If placement is too far away, the cone of air will be hitting well outside the opening.

Repair of industrial radial ventilators, fan wheels, blower impellers, stainless steel ventilators, combustion pressure blowers, high temperature industrial ventilators, material handling blower fnas, paddle radial ventilators / fans, high temperature oven ventilators, compact blowers, blowoff fans blowers, blower blade impellers, SST blowers & fans, wall exhaust blowers, duct ventilators, roof / wall supply ventilators, industrial high pressure ventilators, stainless ventilators, explosion-proof fans, replacement ventilators.
FRP Radial Fume Exhauster and FRP Pressure Blower are designed so that all parts exposed to the airstream are constructed of high-quality corrosion-resistant fiber-glass reinforced plastic. The RFE and FPB blowers are resistant to attack from most chemicals and are ideally suited to applications in the chemical, pulp and paper, waste-water-treatment, fertilizer, pharmaceutical, and metal-plating industries. Specifically, the RFE is designed for exhausting moderate volumes of highly corrosive fumes at moderate pressures. Typical applications include laboratory fume hoods, small plating and pickling operations, etching processes, and chemical-fume scrubbers. The FPB blower is designed for low volumes at high pressures.

Typical applications for FRP blowers include pulp and paper processes, chemical-fume scrubbers, and soil remediation.

Blower wheel is cast in a one-piece mold with a resin-glass mixture featuring premium-quality, corrosion-resistant vinyl ester resin. Solid FRP fan wheels are oven-cured to provide optimum strength and corrosion resistance. Radial-blade design provides stable, pulsation-free performance over the entire pressure range from wide-open to closed-off. Standard shaft is ASTM A-108 steel, grade C-1040/1045. Inside the FRP fan housing the shaft is covered with an FRP sleeve that is bonded to the wheel backplate and extends through the housing side, protecting the shaft from corrosive attack; 316 SST shafting also available.

Fan FRP fan housing is made of premium-quality, corrosion-resistant vinyl ester resin. The interior is extremely smooth, due to fabrication on male molds. Flanged inlet and outlet for easy in-duct connection with ANSI Class 150 lb. patterns.

Welded-steel blower base is constructed of heavy-gauge components for structural strength and durability. Arrangement 10 fan base features self-contained motor platform.

Close-fitting, Teflon shaft-hole closure limits the free exchange of gases through the shaft-hole opening. Neoprene gasketing at all bolted FRP joints.Fan exterior is coated with gray epoxy enamel.

RFE and FPB FRP fan wheels are dynamically balanced before final assembly. After final assembly, all FRP fans are given a final balance check at the specified running speed, and meet ASTM D 4167 Standard Specification for Fiber-Reinforced Plastic Fans and Blowers when fan is purchased with surface veil.