Introducing the VIVOSUN 4Inch Inline Duct Fan Variable Speed Controller HVAC Blower Kit 190cfm. This powerful and versatile ventilation inline exhaust fan is perfect for indoor and outdoor use. It features an adjustable height and thermostat, and is made of durable ABS plastic. Its compact size of 8 inches in height and width makes it easy to install in any room, while its air flow volume of 190CFM ensures optimal air supply and ventilation.

The fan is available in black and can be powered by USB, battery or electric source. It is suitable for use in hydroponics and other gardening applications. With its adjustable features and high performance, the VIVOSUN 4Inch Inline Duct Fan Variable Speed Controller HVAC Blower Kit 190cfm is a must-have for any home or garden enthusiast.