Hon&Guan 100mm EC Variable Speed Duct Fan, 366m³/h Inline Ventilation Fan, Exhaust Fan for Grow Box, Grow Tents, Hydroponic Growth Tents, Basement, Garage, Kitchen

["Product Parameters: Diameter: 3.94 inches, Air Volume: 216 cubic feet per minute, Running Noise: 45dB, Power: 70W, Pressure: 578Pa, Fan Blades: 8, Control Cable: 16.4 feet","Energy efficient and Stable: The duct fan is equipped with a high-efficiency inverter EC motor with professional ball bearing technology, slow start and motor protection, which keeps the voltage stable and increases its lifespan.","Variable Speed Controller: The inline duct fan 4 inch with a variable controller can adjust the speed between 0% and 100% to meet your different requirements during operation.","High-quality Duct Fan: Protection class is IP44, Anti-water droplets. The fan housing is made of high-quality ABS plastic, which is hardly breakable, light, and easy to clean. Suitable for hotels, supermarkets, hydroponic plantations, basements, garages, bathrooms, etc.","Tip: The noise data is measured with professional instruments at a distance of 6.56 feet from the products connected by pipes on both sides, must be done in a super quiet room with 8.8 dB. Environment and non-professional nature of the device can lead to large measurement data. When measuring fan noise, the pipes must be connected to both ends of the fan."]