DFBZ low noise axial flow fan with square wall high efficiency and low noise axial impeller, fan motor Direct drive, square silencer shell (which can further reduce the fan noise; machine made of square, square hole wall reserved for simple installation convenient). Outlet is equipped with an aluminum alloy from the vertical blinds (prevents outdoor rain, dust and wind natural indoor intrusion); obviously beautiful appearance, low noise, smooth operation, installation firm, etc., widely used in civil engineering and industrial enterprises and commercial buildings Workshop low-noise wall exhaust. Fans of the series are generally equipped with three-phase motors, according to user requirements can be equipped with the following 0.55kW single-phase motor.