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Impeller type


Square Inline Centrifugal Fan,
Direct Drive


The DSI Square Inline Centrifugal Fan is specifically designed for duct applications handling relatively clean air, including supply, exhaust and return air systems. The DSI fan offers high efficiency and quiet operation in a compact design that can be mounted in any position (horizontal, vertical or angular). Duct collars are provided for easy mounting without the need for square to round duct transitions.

The DSI utilizes a non-overloading, backward inclined centrifugal wheel precisely matched to a spun venturi. All wheels are statically and dynamically balanced.

Sizes (impeller diameters)

  • 8 to 16.5 inches (205 mm to 420 mm)


  • Airflow to 5,800 CFM (9,900 m3/hour)
  • Static pressure to 2 inches w.g. (500 Pa)

Product Catalog

Brochures & Flyers

Installation manual