Roof Mounted Fans

Hooded Axial Supply Fans

Propeller fans suitable for supplying air in clean air applications including factories and warehouses.

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Hooded Axial Exhaust Fans

Fans suitable for exhausting in clean air applications including factories and warehouses.

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Centrifugal Upblast Exhaust Fans

With motors out of the airstream, applications include fume hood or kitchen grease exhaust.

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Centrifugal Downblast Exhaust Fans

Belt and direct drive fans discharge air downward and are suitable for applications exhausting relatively clean air.

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Centrifugal Supply Fans

Filtered supply fans are designed to provide non-tempered, filtered make-up air in commercial and industrial buildings.

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Shop Greenheck Roof Mounted Fans

Select from a wide range of fan and ventilator products for commercial, institutional and industrial roof installations. Available for exhaust and supply applications, these products use two styles of fans —direct drive, used where maintenance access is difficult, or belt drive, which allows adjustment of fan speed for system balancing.

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Enter information into the fields below in order to calculate the CFM (per fan).

Calculate Static Pressure (SP)

The pressure generated by fans in ductwork is typically very small. An accurate measurement of static presure is critical to proper fan selection however. Static pressure in fan systems is typically less than 2" SP, or 0.072 Psi.

Static Pressure Guidelines

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