Ultra-Quiet AC Infinity CLOUDLINE PRO S4 Quiet Inline 100mm 350m³/h Duct Fan - Dust- and Moisture-Resistant Programmable Fan with Speed Controller. Designed to quietly and efficiently circulate air in rooms like grow tents and grow boxes. Equipped with a wired remote control with 10-speed fan speed control; also compatible with all UIS controllers (AC Infinity controllers) with intelligent programming. The PWM (Pulse Width Modulation) controlled EC motor ensures quiet and energy-efficient operation with minimal heat and noise. The mixed-flow fan design with an impeller blade and hydrodynamic wind circles allows for delivering airflow in areas of high air resistance. Duct Size: 100mm | Dimensions: 18.8 x 30.3 x 17.6 cm | Air Flow: 205 CFM | Noise: 28 dBA | Bearings: Double Ball | Model: AI-CLS4 ABOUT THE PRODUCT: Intelligent inline duct fan designed for quiet ventilation of hydroponic grow rooms, supporting indoor heating/cooling, circulating fresh air, and exhausting air from various projects. Thanks to its integrated mixed-flow design, the duct fan can maintain airflow even in high static pressure applications. It is built with a PWM-controlled EC motor for quiet and energy-efficient operation. The motor housing containing the impeller and fan blades can be detached from the mounted frame for easy cleaning and maintenance. It includes a smart controller with dynamic climate and time-based programming and can connect to multiple UIS devices. This product is part of the UIS™ platform of growing devices and smart controllers, designed to integrate with each other to create the ideal environment. PRECISE SPEED CONTROL: The speed controller allows you to set the duct fan's speed between ten levels to achieve optimal noise levels and airflow in various environments. Precise airflow control is aided by a state-of-the-art EC motor built into the fan, which is precisely controlled via PWM (pulse width modulation). This allows for smooth operation at very low speeds without generating motor noise. It also has a memory backup that retains the last speed setting when the controller is powered down. QUIET AND ENERGY-SAVING DESIGN: This duct fan uses a mixed-flow design, utilizing a fixed blade and dual hydrodynamic fans, allowing it to maintain airflow even in applications with limited airflow. The motor uses dual ball bearings with a 67,000-hour lifespan, allowing the duct fan to be mounted in any direction. The unit is IP44 rated, meaning it is highly resistant to dust and liquids and operates reliably even in harsh environments. VARIOUS APPLICATIONS: This quiet duct fan is popular in a variety of applications, including cooling AV equipment rooms, cabinets, racks, and closets. Its low noise level and advanced control features also make it suitable for a variety of air circulation and ventilation projects, including hydroponic grow rooms and tents, bathrooms, attics, and more. PRODUCT SPECIFICATIONS: Brand: AC Infinity Color: Black Fan Type: Exhaust Fan Power Source: Electric Cord Dimensions: 18.8 x 30.3 x 17.6 cm Special Features: Remote Controlled, App Operated, Waterproof Recommended Applications: Air Extraction, Ventilation, Cooling Noise Level: 28 dB Power: 21 W Maximum Power: 28 W Power Cord Length: 244 cm Maximum Fan Speed: 2800 RPM Number of Blades: 10 Airflow Capacity: 350 m3/h Voltage: 100-240V AC Included Items: Remote Control, Cord Optimal Humidity Range: 35 to 85% Application: Indoor Estimated Operating Time According to the Manufacturer: 67,000 Hours Specifications Compliant with CE, ETL, RoHS Certificates Model: AI-CLS4 Product and Mounting Dimensions - Fan Module Duct Size: 4"/100mm Overall dimensions: 18.8 x 30.3 x 17.6 cm Distance between mounting holes: 8.0 x 6.0 cm Screw hole size: ? 0.5 cm Cable length to the controller: 305 cm Product and installation dimensions - controller Overall dimensions: 8.5 x 3.6 x 1.3 cm