CUD Series In-line Fan

The Vortair® Series of In-Line Fans is designed for a wide range of duct mounted applications. Their innovative high performance mixed flow impeller produces powerful airflows without generating high noise levels. They feature a heavy duty galvanised steel circular fan casing that can be retrofitted into axial fan installations that may require greater static pressure. They are available in various speed options and 6 case sizes with diameters ranging from 400 to 710mm (250 to 450mm impeller diameters).

Typical Applications
Commercial and industrial supply or exhaust air applications such as shopping centres, office buildings, exhibition centres, hotels, health centres, schools and universities.

CUD Series


  • Innovative mixed flow impeller with high performance blade geometry.
  • Heavy duty galvanised steel construction.
  • Can be retrofited into standard 400 to 710mm axial fan installations.
  • Large choice of speeds available.
  • Can be mounted in any position.
  • A range of matched ancillaries is also available.

Mixed-Flow impellers are made from high performance injection moulded composite plastic material. Casing made from heavy duty galvanised steel.


Type - can be supplied with standard direct-drive TEFC/TEAO motors.  Electricity supply - single or three-phase to suit a wide range of voltages and frequencies.

Air flow tests based on ISO5801: 2007 Noise tests based on ISO13347: Part 3, 2004

Wiring Diagram
See pages N-8, diagrams ER1, 2, 3, 4, 5 for external rotor motors and N-6/7, diagrams DD1, 2, 3, 7, 9 for standard direct-drive TEFC/TEAO motors.

Suggested Specification

The duct mounted fans shall be of the Vortair® Mixed-Flow Series as designed and manufactured by Elta Pty. Ltd. and be of the model numbers shown on the schedule/drawings.

They shall include a heavy duty galvanised steel circular fan casing.

Impellers shall be made from high performance injection moulded composite plastic material and driven by external rotor or standard direct-drive TEFC/TEAO motors as nominated.

All performance data shall be for a complete assembled unit based on ISO5801: 2007 for air flow and ISO13347: Part 3, 2004 for noise.


* Fan with direct-drive motor - DD

** Fan with external rotor motor - ER

# Weight and volume for fan with direct-drive motor only except where there is only external rotor motors available

Performance curves shown are based on nominal speeds.

As motor speeds may vary from one manufacturer to another, and from one motor type to another, it is possible actual fan speeds may differ and, therefore, the performance of the fan.

For Direct-Drive performance refer to Fans by Fantech Selection Program.


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