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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:
           
Canada Blower 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. Canada Blower 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).
 
Canada Blower 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 Canada Blower 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 blower 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 Canada Blower 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.
 Backward curved fan blowers in New York City and Chicago, aerofoil / acoustafoil, or aerocline fan blowers with high temperature construction, stainless steel SS316, SS316L, SS304, aluminum, explosion proof - spark resistant construction, monel construction. Supply of replacement backward curved (BC) fan blowers and airfoil (AF), or acoustafoil (AcF), or Aerocline fan blower parts for backward curved bc fan blowers manufactured by Buffalo Blower - New York, Twin City Fan, Northern Blower, Chicago Blower, Sheldons, Cincinnati Fan, Hartzell, IAP, Industrial air products, Canadian blower, Aerovent, Penn Ventilation, Penn-Barry, Barry Blower, ACME, Aerovent, Alphair, American Fan, Lau Industries, Clarage, Delhi, Canarm, Leader Fan, Daltec, ABB, Flakt, Flaktwoods, Woods, MK Plastics, Robinson Industrial, Garden City Fan, Loren Cook, Jen-air, Jenn Fan, Aeroflo, Grainger, Greenheck, Kice Fan, ILG Industries, Canada Fan, Industrial Air, Ceilcote
Widely recognized for design efficiency and integrity, Canada Blower airfoil wheel has ideal characteristics for variable air volume systems. The fan's deep spun inlet and hyperbolic wheel cone plus generous fan housing proportions provide a smooth stable air flow over the entire performance range. Precision balancing assures quieter vibration-free operation that adds to the overall reliability and performance of Canada Blower's airfoil fans.

Canada Blower upblast power roof ventilators are designed to discharge vertically so that air velocity seals the opening against rain and snow while the unit is in operation. Whe fan is switched off, counterbalanced dampers close by gravity to provide a weather-resistant closure.

These roof exhausters are available in wide range of sizes and capacities: with blade diameters from 18" to 84" and capacities ranging from 1000 CFM to appr. 100,000 CFM. Fans of this type are quite efficient, dependable and require relatively little maintenance.

The Canada Blower JBH PRVs utilize a cross-frame to support unique bearings and fan shaft assembly. This stationary shaft mounts on the cross-frame member and power is applied directly to the prop hub in the same plane as the bearings. This reduces bearing load and substantially increases the fan bearing life. Bearings are permanently lubricated and sealed and have an L-10 life exceeding 300,000 hours. All roof exhaust fans are available with such accessories a motor-out-of-airstream kits, roof curbs, protective coatings, safety guards, spark-resistant and explosion proof ventilator constructions, and many other useful features.