4 Inch Inline Duct Centrifugal Fan 150 CFM

【Centrifugal Fan inside】 produced with two layers sound absorbing and sound wave holes to reduce noise level. 【Casing is made of ABS】(FR), Backward-curved centrifugal impeller using PA66(FR), ABS(FR) connection box. 【Brushless motor】 is equipped with automatic reset thermal overload protection. External rotor motor with low temperature rise. 【NSK ball bearing】, acceptable for continuous operation of 50000h. 【-30°C~60°C Operating temperature range】IP44 Protection class, effective waterproof and dustproof. Insulation Class: F. Parameter Diameter 4 Inch/100 mm Voltage 220~240V/50Hz 100~120V/60Hz Current 0.24 amps 0.6amps Power 51W 75W Speed 2700 RPM 2700 RPM Air Flow 255m3 / h 255m3 / h Air Pressure 353 Pa 411Pa Noise 41 dB 41 dB