ROOFTOP AIR EXTRACTION SYSTEM
A roof-mounted turbine that uses moving air to continuously pull hot, stale air and fumes out of a building, without drawing any electricity to do it.
QUICK PRODUCT SUMMARY
A roof ventilator sits on a mounted base over a roof opening, with a curved-blade turbine head exposed to the outside air. As wind passes over the blades, the head spins and draws air out from directly beneath it, creating continuous suction that pulls hot, stale air and fumes out of the building below — with no motor, wiring or running cost involved.
PERFORMANCE ADVANTAGES
Roof ventilators are selected for buildings that generate heat, fumes or moisture and need continuous air movement without adding to the electricity bill. Their suitability always depends on roof area, internal heat load and local wind conditions.
Wind-driven models need no electrical connection, wiring or motor, so ventilation continues at no ongoing power cost.
Constant suction removes hot air that collects near the roofline, helping lower indoor temperatures in occupied and process areas.
Continuous air extraction helps clear airborne fumes, dust and condensation, supporting a cleaner working environment below.
Aluminium alloy and stainless steel construction with protective coatings resist rust across outdoor rooftop exposure.
Sealed, permanently lubricated bearings and a simple moving-parts design keep servicing needs to a minimum over the unit's life.
Fits directly over a standard roof opening on metal, tiled or PEB roofing without major structural modification.
HOW IT WORKS
A wind-driven ventilator turns ordinary moving air into continuous suction, extracting hot air from inside the building the whole time it is spinning.
Outside air passing over the turbine's angled, curved blades causes the head to begin rotating — even light breezes are enough to start it turning.
As the head spins, it draws air out from directly beneath it through the roof opening, creating a continuous low-pressure pull inside the building.
Hot, stale air near the roofline is drawn out and expelled, while cooler fresh air is pulled in through doors and vents lower down to replace it.
APPLICATION AREAS
Roof ventilators are used wherever a building generates heat, fumes or moisture faster than natural airflow alone can clear it.

Industrial
Removes process heat, fumes and airborne dust generated by manufacturing and processing equipment on the shop floor.

Warehousing
Clears trapped heat that builds up under large roof areas, helping protect stored goods and improve working conditions.

PEB
Commonly fitted along the roof ridge of pre-engineered buildings to ventilate large, open-span interiors.

Plant Rooms
Extracts residual heat around boilers, compressors and other equipment that raise ambient temperature in enclosed plant areas.
TYPE COMPARISON
The right type depends on how much natural wind the site gets and whether ventilation needs to keep working on still days.
| Type | How It Runs | Best Suited For |
|---|---|---|
| Wind-Driven Turbo | Spins freely using ambient wind, no power needed | Sites with consistent natural airflow |
| Static Ventilator | No moving parts, relies on natural convection | Low-maintenance, low-wind locations |
| Powered Ventilator | Electric motor with optional wind-assist | Areas needing guaranteed extraction on still days |
Note: exact model and neck diameter should be selected based on roof area, internal heat load and site wind data.
SIZE AND MATERIAL
Neck diameter and material grade should be matched to the roof opening, exhaust requirement and exposure conditions at the site.
Commonly available from about 6 to 24 inches — larger diameters extract more air per unit but need more roof clearance.
Lightweight and naturally corrosion-resistant, often finished with a fluorocarbon or polyester coating for added protection.
Higher strength and durability for demanding industrial or coastal sites where extra corrosion resistance is needed.
Sealed, permanently lubricated bearings with a stainless steel centre shaft support smooth, low-friction rotation over time.
TECHNICAL INFORMATION
The exact specification varies by neck diameter, material and turbine design. Refer to the current technical datasheet for final project selection.
| Turbine material | Aluminium alloy or stainless steel |
| Base material | Galvanized steel or aluminium mounting base |
| Type | Wind-driven turbo, static or powered |
| Neck diameter | Approximately 6 to 24 inches |
| Bearing type | Sealed, permanently lubricated bearings |
| Centre shaft | Stainless steel |
| Finish | Fluorocarbon or polyester powder coating |
| Exhaust capacity | Refer to current product datasheet, by diameter |
| Mounting | Fixed over a roof opening on a sealed base |
| Power requirement | None for wind-driven models |
| Typical applications | Industrial sheds, warehouses and PEB roofs |
| Installation method | Roof-mounted over a cut opening with flashing |