Airfoil Fans

Airfoil FANS are available in the following sizes, ventilator wheel designs, and air flow & pressure ranges.


Fan Sizes Fan Wheel Design Air Volume & Static Pressure
245-1200 BI – Backward Inclined Blades To 186,000 CFM & 16″ W.G.
365-1200 AF – Airfoil Fan Blades To 188,000 CFM & 16″ W.G.
1320-2175 BC – Backward Curved Blades To 710,000 CFM & 16″ W.G.

Aerodynamic fan wheel features include non-overloading fan horsepower characteristics and high efficiency.

AF fan wheels, including blower blades,  fan wheel flange and backplate, are also made of high-strength steel as standard. Fan blades are die-formed and welded to the spun wheel flange and fan wheel backplate.

BC fan wheels are made of die-formed, high-strength steel fan blades, die-formed steel flange and steel fan backplate as standard. Blower blades are welded to fan wheel flange and fan impeller backplate.

Bl and AF double-width, double inlet fan wheels utilize a common center plate blower wheel design. BC double-width, double-inlet fans utilize two BC fan wheels.
All Airfoil fan wheels are offered with cast iron hubs. Wheel hubs are designed with a high hub-to-wheel ratio which adds to the overall structural integrity of the ventilator wheel. Blower hubs are straight bored to a close tolerance fit to the fan shaft. Wheel / ventilator hub assemblies are keyed and set screwed to lock the wheel to the fan shaft.

State-of-the-art CAD tools are used to design and detail the entire fan line. Multi-light source shading of a 3-D model is shown.


Inspection and Access Fan Doors are gasketed, hinged and shaped to conform with the fan scroll contour. Handled fasteners are used to secure the closed door. All hardware remains on the fan when open. Raised doors to facilitate application of external fan insulation are also available.

Split Fan Housings are fitted with bolted companion surfaces along the horizontal center line as standard. Other horizontal, vertical and pie-shaped splits are available. Splits are used for access to fan interior, to meet restricted openings or because of shipping dimensional constraints.

Blower Shaft Seals are constructed of a non-ferrous material with close tolerance to shaft diameter. Attached to the fan housing the shaft seals limit air leakage around the fan shaft.

Fan Outlet Connections. Slip connection is standard on Class 1 & 2. Flanged fan outlet  connection is standard on Class 3. Flanged ventilator connection is also available as an option for Class 1 & 2. Drilling of blower flange is available.

Drain Connections are half pipe couplings with or without a flange welded to the fan scroll at its lowest point.
Inlet Connections can be furnished with a square or round, slip or flanged connection. Drilling of flange is available.
Channel Base. All fan arrangements can be furnished with a sub-base. Fan bases are made of structural steel and can be provided with or without vibration isolators. Inertia bases that can be filled with concrete after installation are also available.


Heat Slinger. Split aluminum shaft cooler mounted on fan shaft between housing and inboard bearing dissipates conducted heat. Required for 450°F temperature operation. 80,000 Hr. L-10 life bearing and heat slinger required for 600°F temperature operation.



Variable Fan Inlet Vanes are available as an option for all classes of fans.
Blower Outlet Dampers are available with opposed and parallel blades. Fan Dampers are designed to match fan outlet velocity, pressures and temperature and have flange connections. Fans require a flanged outlet if damper is to be mounted on the fant.


Fan Belt Guards and Shaft Guards are standard per OSHA requirements. Constructed of mill galvanized steel, belt guards are solid or perforated metal sides with openings for tachometer readings. Shaft guards are perforated metal. Shaft guards are used for blower heat slinger guarding. When a fan shaft guard is used in conjunction with a belt guard, the entire rotating assembly is guarded.
Fan Coupling guards are furnished to OSHA standards. Constructed of mill galvanized steel, the coup¬ling guard bolts in place.
Ventilator Inlet and Outlet Screens of galvanized steel are furnished per OSHA requirements.
Fan Weather Covers are furnished to OSHA standards of mill galvanized steel on arrangement 10 fans. Covers motor, drive, fan shaft and bearing.


Fan spark resistant construction, in accordance with AMCA standards, is available as an option on Airfoil fan single inlet arrangements 1, 4, 8, 9 & 10 only. Bearings are not placed in air or gas stream. User shall ground all fan parts. AMCA Type “B” or “C” conform to requirements of NBFU pamphlet 91 for fans handling flammable vapors.
TYPE “A”: All parts in contact with air or gas handled are of non-ferrous material… aluminum fan  wheel, housing with inlet cone and Monel fan shaft. All other ventilator parts are standard steel.
TYPE “B”: Aluminum fan wheel and a non-ferrous ring around the opening through which shaft passes. All other blower parts are standard steel.
TYPE “C”: Non-ferrous fan inlet cone or non-ferrous ring on steel inlet cone and around the opening through which ventilator shaft passes. All other fan parts are standard steel.
Offered for fans handling explosive mixtures, the type of construction depends upon the degree of spark protection desired. Non-sparking construction type Everdur is also available.


Depending upon conditions, Canada Blower can furnish fans with special coatings, galvanizing, rubber coverings or special metal ventilator construction. Fans with special coatings can be furnished per paint manufacturers recommended surface preparations, such as continuous welding, rounding of sharp edges, sand blasting, etc.  as required. Your Canada Blower Sales Engineer can offer technical advice along with recommendations for corrosion resistant applications.


  • Bolted Construction
  • Companion Flanges
  • Dual Fan Shaft Extensions
  • Fan Inlet Boxes
  • Special Bearings
  • Special Blower Nameplates
  • Low Leakage Shaft Seals
  • Weep Holes in AirFoil Fan Blades
  • Consult your Canada Blower Fan Engineers for above options.




ARR. 1 SWSI For belt drive or direct connection. Blower impeller overhung. Two bearings on fan base.


ARR. 3 SWSI For belt drive or direct fan connection. One bearing on each side and supported by fan housing.


ARR. 10 SWSI For belt drive fan. Impeller overhung, two bearings, with prime fan mover inside base.


ARR. 4 SWSI For direct drive. Fan impeller overhung on prime mover shaft. No bearings on fan. Prime mover base mounted or integrally directly connected.


ARR. 9 SWSI For belt drive. Blower impeller overhung, two bearings, with prime mover outside fan base.


ARR. 7 SWSI For belt drive or direct fan connection. Arrangement 3 plus base for prime mover.


ARR. 8 SWSI For belt drive or direct connection. Arrangement 1 plus extended fan base for prime mover.


ARR. 3 DWDI For belt drive or direct connection. One bearing on each side and supported by fan housing.

ARR. 7 DWDI For belt drive or direct fan connection. Arrangement 3 plus base for prime mover.


CCW-TH CCW90 Counter-Clockwise Top Horizontal

CW-TH CW 90 Clockwise Top Horizontal

CW-BH CW 270 Clockwise Bottom Horizontal

CCW-BH CCW 270 Counter-Clockwise Bottom Horizontal

CW-UB CW 360 Clockwise Up Blast

CCW-UB CCW 360 Counter-Clockwise Up Blast

CW-DB CCW180 Counter-Clockwise Down Blast


CW-D6 CW 180 Clockwise Down Blast

CCW-TAD CCW 135 Counter-Clockwise Top Angular Down

CW-TAD CW 135 Clockwise Top Angular Down

CW-BAU CW 315 Clockwise Bottom Angular Up

CCW-BAU CCW 315 Counter-Clockwise Bottom Angular Up

CCW-TAU CCW 45 Counter-Clockwise Top Angular Up