4 Inch Ultra Silent Inline Fan with Wireless Controller

Silent inline fan body is made of environmental protection material with beautiful lines and light weight, double insulation. Fan blade is designed according to hydromechanical principle to reach the optimal airflow and air pressure, high efficiency working and low energy consumption. Duct Fan inside produced with two-layer sound absorbent and sound wave holes, to reduce noise level. Double diameter connection, sealing-up, leak-proof and shockproof. Backdraft damper designed inside, to prevent return air and insects. Protection class: IP44. Can be designed with user friendly features such as time delay, temperature sense, humidity sensor or other customized functions.? In automatic mode, the controller controls the fan at high speed when the air quality is higher than the set value (temperature, humidity, VOC value), and the fan stops only when the air quality is lower than the set value. The silent duct fans offers solution to ventilation problems, especially in places where people work and live and low sound level is required, such as meeting room, office, hotel, public place, residence, hospital, gym and etc. Parameter 1. Fan AUTO/Manual mode switching freely2. Low, medium, high air speed optional3. Detect environmental temperature4. Detect environmental humidity5. Detect environmental VOC value6. 1-30 minutes timer setting Speed D:100/125mm H M L Voltage/Frequency 220-240V/50 Hz Current 0.16 Amps 0.14 0.13 Power 37W 33W 28W Speed 2600 RPM 2250 1850 Air Flow 310 m3 / h 284 248 Air Pressure 177 Pa 159 106 Noise 29 dB 25 dB 22 dB Protection IP44 Class