The ventilation exhaust fan can be installed in a structure in place of an existing ventilation exhaust fan assembly.

The electrical apparatus (60) comprises an exhaust blower (61).

A suction fan (34) is also carried on the housing (16).

The multiple-flow fan has a double impeller (5) for creating a suction air stream and a frontal turbulence stream.

  A one-way clutch (19) is mounted between the fan shaft (15) and the suction fan (18).

Said exhauster hood (12') comprises a suction channel (54') on the inlet side of which an inlet filter (30) and on the outlet side of which a suction fan (32) is located.

The intake air line comprises an intake fan and passes via the evaporator.

A vacuum cleaner has a suction nozzle, a housing connected to the suction nozzle and a suction fan and motor assembly mounted to the housing.

The relay duct (87) is formed in a shape of a straight line that connects between an air release port (84b) of the suction fan (84) and a suction port (88a) of the separating fan (88).

A radiator having an outside air suction fan is disposed forward of an engine, and the engine and the radiator are covered by the bonnet.

A dirt collecting receptacle is mounted to the housing and is in communication with the suction nozzle and suction fan and motor assembly.

A vacuum cleaner has an electric motor (15) and a suction fan (17) connected to the motor.

The oil fume sucking fan (109) is arranged in the oil fume sucking channel (101) and fixedly connected with it.

The ventilated space (43) is connected to the exhaust blower (61) via an air duct (45).

An air suction fan blade (7) is disposed on an output shaft of the motor.