FD fans

A fan is a device for moving gas with a compression ratio of less than 1.15 (or a pressure difference at the outlet and inlet of not more than 15 kPa, with a larger pressure difference, a compressor is used).

Main application: systems of forced supply and exhaust and local ventilation of buildings and premises, blowing of heating and cooling elements in heating and air conditioning devices, as well as blowing of cooling radiators of various devices.

Fans are usually used to move air - for ventilation of premises, cooling equipment, air supply to the combustion process (blowers and smoke exhausters). Powerful axial fans can be used as propellers, since the thrown off air, according to Newton's third law, creates a reaction force acting on the rotor.