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Roof Ventilator
   
 

It's ideal for high performance industrial Roofs. This Ventilation System is driven by natural wind & it's turbines operate by utilising the velocity energy of the wind to induce airflow by centrifugal action.

The centrifugal force caused by the spinning vanes creates a region of low-pressure area, which draws the air through the turbine. The air drawn out by the exhaust ventilator, is continuously replaced by fresh air from outside.
 
   
  Operation

The ventilator operates by harnessing the full velocity energy of the wind, to induce airflow by centrifugal force. During rotaion, the centrifugal force created, draws the air in the turbines towards the spinning vanes and out of the turbine. The airfoil vanes act as cups, catching the wind at the windward side of the turbine. Simultaneously air is forced out at the leeward side creating continuous airflow; giving rise to ventilation.

Unlike doors and windows, these wind driven ventilators, draw air upwards, creating convection current and in the process, they extract stale air, with air which is hot due to the building exposure.

  
   
 
 
   
  Advantages of Air Exhaust Ventilator:

» Factory guarantee for 5 yrs.
» This unique design doesn,t allow air to enter from top, hence creating an un-directional flow of air, thus more effective than conventional system
» Absolute low costs, No maintenance costs & No electricity costs
» Complete assurance of air ventilation for 365 days
» Maintains hygienic conditions by removing foul smell
» It is human & environment friendly
» It's Leak proof, hence doesn't allow water to enter inside
» Easy to install on existing old roof or new roof of any type, having slope of 0 to 45 degree
» Reduces structural stresses & dampness problem
 
   
  Selection Procedure

1) Determine volume of space to be ventilated
Volume (ft3) = L x W x H
L = Length, W = Width, H = Height of building

2) Select Ai Change Rate

3) Calculate required ventilation rate Q (cfm)
 
Q (cfm) = Volume (ft3) x Air change Rate
60
4)
Determine No. of ventilators = Ventilation Rate Q
Exhaust Capacity
  Building demensions with L=100ft, W=60, H=20ft
Volume (ft3) = 120000 ft3
Air change Rte selected = 12 per hour
 
Ventilaltion rate Q= 120000 x 12 =24000 CFM
60
  Exhaust capacity = 1972 CFM
under wind valocity of 8mph having stack height 20ft
 
Means = 24000 =12 Nos. of air exhaust ventilators will be required
1972
 
     
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