Backdraft

Technical Information

Calculations

As per regulation, mechanical ventilation requirements for smoke ventilation should be calculated to maintain a minimum of 10 air changes per hour. Due to the variation of extraction capacity, the backdraft ventilator is calculated to maintain 10-15 air changes per hour. The below extraction table is to be used at an average of 25km/h to determine the quantity of ventilators required.

 

Note: The Backdraft ventilator is not designed for Zone-controlled alarm activation smoke ventilation and only to be used as free-standing ventilators similar to fusible link smoke ventilators.

Features and Specifications

Superiority of the Product

The Tornado features such superior qualities as:

  • Special patented fire and heat resistance bearing system
  • Durable construction of ventilator
  • Manufactured in a choice of Galvanised, Aluminium, Zincalume or Chromadek material
  • Various models available: 500mm, 610mm and 715mm
  • Adjustable throat section
  • *3-year warranty
  • Changeable bearing system
  • Tested extraction capacity
  • Fire rated certification

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Tornado and Backdraft Specifications

The below graph illustrates the performance difference of the various size ventilators as per tested extraction capacity reflected in the above table:

Backdraft Laboratory Tests