Ventilation fans

machine with spinning blades used to create airflow

type of fan appliance permanently mounted to the ceiling horizontally

South Korean misconception relating to the use of electric fans

thumb|A view of a Fenestron tail rotor on a Eurocopter EC120B

any fan inside or attached to a computer case used for active cooling

HVAC device

mechanical fan that forces fluid to move radially outward

thumb|Punkahs in the house of a British couple in India c. 1880 thumb|A punkah in the house of French colonials in Indochina c. 1930 thumb|Church interior with an intricate system of punkahs c. 1900

heater that works by using a fan to pass air over a heat source

mechanical fan mounted within a shroud or duct to direct its airflow

mechanical building ventilation where fans are configured to extract air from the building, suitable for cold climates

turbomachinery Equation in Fluid Dynamics

laws used in hydraulics to express relationships between variables involved in fan or pump performance

fan used to keep an attic ventilated

cooling fan