Introducing our 4 in. Inline Duct Fan, a powerful and efficient ventilation solution for optimal circulation and temperature control. With a fan speed of 2500 RPM and an airflow rate of 203 CFM, this fan ensures a strong and reliable performance. The innovative design features an aerodynamic centrifugal impeller, delivering a powerful airflow while producing minimal noise. Enjoy a peaceful environment without the constant loud whirring noise. The dual flanges make installation quick and easy, saving you time and effort. Constructed with factory-painted galvanized steel parts, our duct fan is built to resist atmospheric corrosion and ensure durability. The sturdy structure minimizes rattling and reduces wear and tear, ensuring a long lifespan for the fan. Experience smooth and quiet operation with a low noise output of only 49 dB. Our duct fan is versatile and perfect for various environments, including grow tents, bathrooms, kitchens, hydroponics, HVAC applications, and commercial grow rooms. Enjoy efficient ventilation without sacrificing peace and tranquility. Please note that the speed controller is not included, offering flexibility for customization. Color: Black.