Ventilation fans

Ventilation fans

Industry: Industrial machinery

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Ventilation fans

crossflow fan

Industrial machinery; Ventilation fans

The crossflow or tangential fan, sometimes known as a tubular fan was patented in 1893 by Mortier, and is used extensively in the HVAC industry. The fan is usually long in relation to the diameter, ...

bellows

Industrial machinery; Ventilation fans

Bellows are also used to move air, although not generally considered fans. A hand-operated bellows is essentially a bag with a nozzle and handles, which can be filled with air by one movement, and ...

convective airflow

Industrial machinery; Ventilation fans

Differences in air temperature will affect the density of air and can be used to induce air circulation through the mere act of heating or cooling an air mass. This effect is so subtle and works at ...

electrostatic fan

Industrial machinery; Ventilation fans

An electrostatic fluid accelerator propels airflow by inducing motion in airborne charged particles. A high voltage electric field (commonly 25,000 to 50,000 volts) formed between exposed charged ...

Coandă effect

Industrial machinery; Ventilation fans

A small quantity of air from a high-pressure bladed impeller fan, contained in the base rather than exposed, drives a large airmass via a low-pressure area created by the airfoil. Air curtains and ...