YOZON 4-Inch Duct Fan with EC Motor, Inline Fan with Speed Controller – 211 CFM, Quiet, and Energy-Efficient Ventilation Exhaust System, for Grow Tents, Hydroponics, Cooling Booster and Basements

• High-Efficiency EC Motor: This 4 inch duct fan features a 24V EC motor delivering 2800 RPM at just 25W power, generating 211 CFM airflow (360m³/h) with ultra-quiet operation as low as 29dB – equivalent to normal conversation volume for undisturbed performance
• Precision Speed Control: The YOZON grow tent fan includes a PWM infinitely variable speed controller with 98 inch connection cable for flexible placement, enabling 30-100% airflow adjustment to perfectly match your grow tent, hydroponic or HVAC ventilation requirements
• Industrial-Grade Durability: Our duct fan features a heavy-duty metal base for reliable installation in any environment, corrosion-resistant ABS plastic housing, and stainless steel clamps (Grade 201) for secure connections
• Certified Safety Features: This green house fan comes with a UL-certified 70 inch power cord and ETL-compliant 24V power board, delivering enhanced safety for worry-free operation
• Ready-to-Use Package Includes: 1*4 inch inline duct fan unit, 1*speed controller, 2* hose clamps, 4*screw kits, 4*cushions, and an user manual – everything needed for immediate installation and use

The YOZON 4 inch Inline Duct Fan is a compact and efficient ventilation solution designed for small spaces such as grow tents, hydroponics, and home ventilation systems. Powered by a high-performance EC motor, this fan delivers a maximum airflow of 211 CFM while operating at a quiet noise level of ≤57 dB(A). Its PWM signal controller allows for smooth and precise speed adjustments, ensuring optimal airflow for your specific needs. Built with durable ABS plastic and stainless steel clamps, this fan is both reliable and easy to install, making it an excellent choice for grow tents, hydroponics, residential and light commercial use.