VIVOSUN M4 4-Inch Inline Duct Fan, 195 CFM Ventilation Fan with EC Motor, Adjustable Speed, Energy-efficient Vent Blower for HVAC, Grow Tent, Hydroponics

Features

• Efficient and Quiet Ventilation: The PWM-controlled EC motor and mixed-flow design deliver powerful, quiet, and energy-efficient performance; Operating at 2800 RPM, this fan generates 195 CFM of airflow with low energy use and a noise level of just 28 dB
• Adjustable Fan Speed: PWM control enables precise and easy speed adjustment to suit your needs; Simply turn the knob to select from three speed levels and set the fan to your desired speed effortlessly
• Safety Protection: The ETL-listed EC motor includes an automatic reset function to prevent overheating and ensure safety; With locked-rotor protection, the fan cuts off power and resets automatically if the blades are blocked; The flame-retardant electrical junction box enhances fireproofing
• Simple Hookup:Intake and exhaust flanges with locking tabs make vent hose connections quick and secure; The 5.9 ft cord provides flexible setup; The detachable housing, impeller, and blade simplify cleaning and maintenance
• Versatile Applications: Efficiently exhausts stale air, supplies fresh air, and boosts airflow to balance humidity, regulate temperature, and improve air quality in grow tents, grow rooms, basements, or other spaces