Differences Between; In-Line, Mixed Flow And Centrifugal Extractor Fans

1. DIFFERENCES AND TYPES OF EXTRACTOR FANS

IN-LINE FANS

The in-line extractor fans are axial fans and have the peculiar characteristic to be able to be installed directly inside the ducting tube and as in mixed flow fans the extraction and exhaust occur parallel to the axis of the motor, in this way creating a simple transfer of air. These extractor fans are indicated both for air emission and extraction, but are not indicated for transporting air in long ducts.

Advantages of in-line fans.

  • low priced
  • low consumption
  • direct installation in the ducting

 Disadvantages of in-line fans:

  • less power
  • not adapt for transportation of air in medium or long ducts

MIXED-FLOW FANS

The mixed flow fans are characteristic for moving large volumes of air with a low pressure. The extraction and exhaust occur parallel to the axis of the motor, in this way creating a simple transfer of air. These fans are ideal for installing where it is not necessary for the air to travel long distances through ducts. These extractor fans therefor are ideal for moving large quantities of air with direct application and not passing through long distances.

 Advantages of mixed flow fans:

  • medium priced
  • high level of extraction

 Disadvantages:

  • less power
  • not adapt for transportation of air in medium or long ducts

CENTRIFUGAL FANS

These centrifugal extractor fans or radial, have the characteristics of moving low volumes of are but at a high pressure. The extraction of the air occurs along the axis of the motor and the exhaust in a perpendicular direction to it. On their inside the cochlea is present, a winding box/room in which the spun air is conveyed from the fan. These fans supply a high level of pressure which makes them ideal for installing where the air must travel long distances to reach the outside. This extractor fan is therefore indicated for transporting air in long ducts.

 Advantages of Centrifugal fans:

  • high quality
  • high power extraction
  • adapt for transportation of air in long ducts

Disadvantages of Centrifugal fans:

  • lower capacity