Backward Inclined Single Width Class 1-3 Fans

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NYB Single-Width Fans feature three types of backward inclined wheels for maximum selection flexibility and optimum performance: AcoustaFoil® wheels with airfoil blades for highest efficiency in clean, dry airstreams, PLR wheels with flat, single-thickness blades for best performance in moist or mildly contaminated airstreams, and BC wheels with curved, single-thickness blades for good performance in moist airstreams. Call today for details on our SWSI Backward Inclined Single Width Fans Type 1-3.


The New York Blower Company certifies the Class 3 Backward inclined Single Width Fans are licensed to bear the AMCA Seal. The ratings shown are based on tests and procedures performed in accordance with AMCA Publication 211 and comply with the requirements of the AMCA Certified Ratings Program.

  Backward Inclined Single Width Class 1-3 Fans PDF Brochure
Wheel Design: Backward Inclined-Airfoil
Backward Inclined-Curved Blade
Backward Inclined-Single Thickness
Wheel Design

backward inclined airfoil wheel design

Backward Inclined- Airfoil: Aerodynamic airfoil-blade is the most efficient design with the lowest sound levels for clean air applications.

Backward Inclined- Curved Blade: Curved, single-thickness blade is ideal for high volume, low pressure applications.





backward inclined single thickness wheel design

Backward Inclined – Single Thickness: Flat, single-thickness blade surface best suited for airstreams with light material.  

Design Features:

VOLUME - to 200,000 CFM (340,000 m3/hr)

PRESSURES - to 14" WG (3,490 Pa)

TEMPERATURES - to 650°F (343°C)

16 SIZES - 12"-73" (305mm-1,855mm)

ARRANGEMENTS - 1, 3, 4, 4F, 4H, 4V, 8, 9, 10

AMCA Classes 1,2,3 (see also Class 4)

Available Materials of Construction:

Carbon Steel
Stainless Steel
Special Alloys

Product Bulletin: Single-Width Fans with AcoustaFoil/BC/PLR Wheels (131) SWSI Fans, Size 80 and 89 (CS-137)
Guide Specifications: Specifying Single-Width AcoustaFoil Fans with Backward Curved Wheels (GS-131) Specifying Single-Width AcoustaFoil Fans (GS-132) Specifying Single-Width PLR Fans (GS-134)
Engineering Supplements: Arranagement 9 Belt Centers (ES-133) SST AcoustaFoil Wheels (ES-135) Internal Inlet Damper Performance Characteristics (ES-721)
Installation, Operation & Maintenance Manual: IM-100
Material Specifications: SWSI_Dims.pdf SWSI_Arr-4_Dims.pdf SWSI_Size80-89_Dims.pdf
Similar Products

General Purpose Fans (For Packaged Single-Width Fans)
Backward Inclined SWSI Fans Class 4 (For Higher Pressures)

Fan-to-Size Online:

Class 1-3 SWSI

Online Drawings:

Class 1-3 SWSI

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