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Turbo Ventilators

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High Tensile Nuts & Bolts


  • Rigid roll formed curved vanes
  • Weatherproof and storm proof
  • Rotor shaft and bearing assembly concealed in aluminium or stainless steel casing
  • Virtually maintenance-free
  • Light weight and durable
  • Not motor driven, saves cost, need only natural wind
  • Safe as it does not require electricity. No pollution as it uses natural air.
  • Easy to install on any type of roof
  • Light weight, made of Aluminium
  • No Noise as using superlene bush
  • Rainproof as turbo – ventilator is designed to protect from rain water
  • Helps remove stale, damp and hot air:  Steelfab Turbo Ventilator extrats hot and stale air from building by creating a draft and draws unwanted hot air upward, allowing fresh air at ambient temperature
  • Increase productivity

Once the hot air is removed from the building, a new cooler air will replace. This increases workers’ productivity as they do not get too exhausted, and it results in more productivity.

  • Saves Energy

Turbo – Ventilators operates by utilizing slightest wind energy, so it saves power cost. Even building installed with air – conditioners, the warm air, which accumulates above ceiling, will be removed. So, the air conditioner can work with lesser power consumption

  • Prolongs life of Machines

Turbo – Ventilator can event extract dampness in the air out of the building, which results in better & prolonged performances of machines and other electrical system, there by increasing life span


The Benefits of Natural ventilating System
Factories, warehouses, workshops and even community buildings are frequently constructed without an efficient natural ventilation system for the benefit of occupants.

And, if the interior of the building gets hot and stale, there are always doors and windows that can be opened to provide for the ventilation.

However, stale and hot air doesn’t disperse by itself and opening doors or windows is simply not sufficient to provide adequate ventilation in most of the building.

But, by installing Steelfab Turbo Ventilators, you can provide an efficient and cost effective system of natural ventilation for the benefit of the building occupants.These wind driven ventilators, unlike doors or windows, draw air upwards, creating convection currents, and in the process the extract stale air, together with the air which has become hot due to the building’s exposure to long hours of sunlight and from manufacturing processes within the building.
As the stale and hot air is extracted by the ventilators, it is replaced by fresh air at ambient temperature entering through doorways and openings thus completing the convection code current and improving the internal environment.

Needless to say fresh air makes the people feel more energetic whilst stale air causes people to feel tired and on hot days the air movement over the body causes evaporation to occur which is the natural way of cooling down and reducing heat stress on the body.

Steelfab Turbo Ventilators also help prevent condensation by extracting most condensate forming air, and in the case of fire will extract smoke and fumes thus preventing the building from becoming smoke filed and allowing the occupants to escape to safety.

Locating Roof Ventilators
To ensure the ventilators are correctly positioned, it is important to understand the pattern of the wind as it blows across a building. This understanding, will allow the ventilators to be located in the most ideal position, in order to take the full advantage of the prevailing wind.

There are no specific formulas on ventilator locations, however the following points provide a range of recommendations:

  • Attempt to locate the ventilators in a position of undisturbed air flow from all directions. This is not always possible but there will always be some positions which are better than others.
  • Do not install a ventilator on a low roof adjacent to a vertical wall. This area will experience high turbulence in most wind, If the lower area must be ventilated, we recommend a high extension fabrication stack to get above the high roof.
  • Do not install a ventilator below a parapet. Always elevate the unit to catch the direct wind.
  • Do not install a ventilator on a chimney below ridge height.
  • The ideal location of a ventilator is as far away from the air inlet area as possible. This allows the ventilators to extract air from a wider catchment area.

Determination of Quantity

  • Determine volume of space to be ventilated volume

(ft3) = L x W x H
Where L = Length, W = Weight, H = Height of the building

  • Select Air Change rate from Table A


  • Calculate required ventilation rate Q ( CFM)

Q (cfm) = Volume (ft3) x Air Change Rate

  • Determine number of ventilations = Ventilation Rate Q

  Exhaust Capacity

Building Dimensions with L= 100 ft. W= 60 ft. H = 20ft.
Volume (ft3) = 120000 ft3
Air Change Rate selected = 12 per hour
Ventilation Rate Q = 120000 x 12 = 240000 CFM
Exhaust capacity for SBS 24” = 1972 CRM
Under wind velocity of 8 mph, temp diff of 5 degrees,
Stack height = 20 ft.

Required Quantity is 12 Nos. of SBS 24”


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