Centrifugal Plug Fans

D90 – Centrifugal Plug Fans


355 – 1486

up to, 48   m3/s

up to, 2.3  kPa

up to, 65o  C

Clean air applications including HVAC, Air Handling Units

The D90 range of Plug Fans, offer a practical and economical design alternative for air handling and conditioning systems. They feature an unhoused impeller that installs directly within a plenum, thereby eliminating the downstream discharge. The fan can be installed either horizontally or vertically. Without the conventional scroll, the Plug Fan provides the required performance in less space. It is ideal for use in built-up units and factory built air handling units. They are also ideal for retro fit applications where the system performance needs to be expanded and additional space is not available. The impeller is a specialized European design and includes a rotating diffuser which improves the efficiency of the fan while reducing noise levels.

Impellers are fully welded to deliver structural integrity and operational longevity. Material gauges for each impeller size have been modelled using finite element analysis. Spun steel impeller cones optimise air flow while precision balancing assures dependable vibration free operation. Precision shafts are of machined, ground and polished SAE 1040 to 1045 Steel. Heavy duty SKF or similar self-aligning ball or roller type bearings are used as standard. Fans are supplied with powder coat finish as standard.

  • Adjustable volume and pressure by manually resetting blade angle
  • Stable air flow over entire performance range
  • Compact direct drive configuration
  • Horizontal or vertical installation
  • High efficiency aerofoil bladed impeller
  • Efficiencies over 80%
  • Rugged industrial strength construction
  • AMCA Certified for air and sound performance

Rated fan performance has been tested in accordance with the requirements of AMCA Standard 210. Rated fan sound performance has been tested in accordance with the requirements of AMCA Standard 300.

The D90 Plug Fan range is available in Drive Arrangement 4. Please refer to our standard designation sheet for further explanation of the above arrangement.


The quick selection chart (opposite page) enables the selection of the most efficient fan for a given duty. To determine the most efficient fan size, locate the intersection of the required volume (m3/s) and static pressure (Pascals) on the graph. The size to the rightof this point is the correct selection.

Variable Speed Drive

Inlet guard
Spark resistant construction
Vibration isolators
Stainless steel or aluminium construction
Special paint and coatings