fan - the machine to move the gas to the degree of compression of less than 1.15 (or a difference of pressure at the outlet and inlet of not more than 15 kPa).

In general, the fan - the rotor, which in some way fixed blade, which are rotating rotors, facing the air, throw it. From the position and shape of blades upon the direction in which the air dropped. There are several main types of type approval of fans used to move the air:

- axial (axial);
- centrifugal (radial);
- diametralnye (tangential);

Fans are generally used for movement of air - for ventilation and cooling equipment, air combustion process (the blower and smoke exhausters). Powerful axial fans can be used as a driving because otbrasyvaemy air, according to Newton's third law, an opposing force acting on the rotor.

Also, fans are shared by way of performance:
- mnogozonalnye
- channel
- roof
- ceiling

Organization offering a goods or service

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