BDB Series

Couble Inlet Centrifugal Fans - Backward wheels

  • The BDB series is DIDW centrifugal fans with high efficiency non-overloading backward curved impellers.
  • The fans are suitable for supply or extract applications in commercial, process and industrial HVAC systems.
  • Sizes of the series are in accordance with AMCA standard 99-0098-76 R20.

BDB Twin Fan

BDB series are also available in twin fan version with two double inlet fans mounted on the same shaft.  To select for win fans, use the curves of single fan with the following factors: 

  • Volume x 2
  • Absorbed Power x 2.15
  • Speed x 1.05
  • Noise + 3 dB

This series is available in type S2, C2 or T2

Performances of Twin fans are not AMCA licensed


  Auto Cad

BDB 200 BDB 225 BDB 250 BDB 280 BDB 315 BDB 355
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BDB 400 BDB 450 BDB 500 BDB 560 BDB 630 BDB 710
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BDB 800 BDB 900 BDB 1000 BDB 1120    
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  Features Example
200 - 355
400- 630
710- 1120
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The Multiflow TDE 500 to 710 range consist of fully cased, cylindrical models with circular mounting flanges at both ends and a wired terminal box.


The Mini Centrifugal Roof Fan series are the new type roof extract units available in 2 sizes and suitable for vertical and horizontal installation. The low noise external motor and high efficient backward bladed impeller meets the requirement of efficient ventilation in residential, commercial and light industrial applications.

Future 150

The Decor Series can be wall or ceiling mounted and is designed to exhaust stale and moist air from bathrooms, toilets, laundries etc. They are also suitable for ventilating all types of small or closed areas.

TD Silent

The Silent Series is a low profile mixed-flow in-line fan that produces low noise when in operation. It does this through a specifically designed perforated internal skin that directs sound waves produced inside the fan to a layer of sound absorbent material.


The low-profile TD-EVO 250 and 315 in-line mixed-flow fans for circular ducts have a unique design where the support bracket allows the motor and impeller assembly to be fitted or removed without dismantling the adjacent ducting.


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