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Quick Details

  • Place of Origin: Delhi, India
  • Mounting: Roof Fan
  • Brand Name: Natural Ventilation System
  • Model Number: Multi-Vent
  • Power: Not Required
  • Blade Material: Aluminium Alloy
  • Type: Wind Driven Roof Ventilator

Packaging & Delivery

Delivery Time 2-3 Weeks


No Operating Costs.
Reduced Power Costs.
Reduced Maintenance Costs.

Specification of Multi-Vent:-

Aluminium alloy Coated Ventilation

Model: - 300/500/600

Materials: - as base material aluminium alloy, on the surface of which sprays a coating of 20µm thickness fluorine carbon polyester;

Working Condition: - Temperature difference between indoor and outdoor is 0.45oC, it begins to revolve at the wind speed of 0.12m/s.

Roofing Angle: - Applied in different roofing in the scope of 0-22.5o oblique angle.

Warranty: -       10 Years

Applicable Scope: - Industrial Plant, commercial, resident house and civil buildings.




Spec Parameter of Multi-Vent Wind Driven Ventilator.




Dimension of Turbine Head (mm)

Dimension of varipitch (mm)

Dimension of Base Flashing (mm)


Vane Number


Major Materials






Fluorine carbon coating aluminium alloy




750 X 800


Fluorine carbon coating aluminium alloy




800 X 850


Fluorine carbon coating aluminium alloy



Principle of Natural Wind Exhausting:-

Natural wind exhausting of turbine ventilator is decided by three following factors:-

  1. Motivation of natural horizontal wind power.
  2. Indoor and outdoor temperature difference causes air pressure difference which leads to air convection. Forming upright wind power.
  3. According to the Bernouli’s Principle of fluid Mechanics, indoor and outdoor wind speed difference causes air pressure difference which leads to air convection.


Bernouli Principle: - The sum of static pressure and dynamic pressure is a constant, i.e. the greater the fluid speed is, the smaller the pressure is.

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