Ventilation is a set of actions and techniques used to arrange air exchange and to provide a specific air medium condition in the premises and in working places.
Ventilation air volume is determined for each premise separately considering concentration of harmful substances. Alternatively, ventilation air volume calculated be set according to the research results.
Air resistance in ventilation system is mainly determined by air speed in this system. Air resistance grows directly proportional to air flow. This phenomenon is known as pressure loss.
Fans are mechanical units designed for air transportation in the ducts, direct air supply or air exhaust from the premises.
External rotor motor design is similar to asynchronous motor design but the motor rotor is located outside of the stator winding and the stator with the windings is located in the motor centre.
To reduce air pressure losses associated with air turbulence provide a straight air duct at the fan inlet and outlet.