Enhance your indoor air quality with the 3.5 in. 168 CFM Inline Duct Fan, designed for versatility and efficiency. This fan features a dual-speed controller, allowing you to switch between a maximum speed of 2240 RPM and a minimum speed of 1860 RPM to suit different environmental needs. With a power capability of up to 24W and 0.23A, it delivers a maximum airflow of 168 CFM and a minimum of 138 CFM, ensuring effective air circulation and improved comfort. Built from high-quality materials, this fan is durable and stable for long-term use. It includes 4 Velcro strips for easy installation and is energy efficient, reducing power consumption while maintaining high performance. Operating at just 35 decibels, it ensures a quiet environment. Suitable for grow tents, greenhouses, workshops, basements, and kitchens, this inline exhaust fan effectively increases air circulation, reduces humidity, and regulates temperature. Compact and lightweight, it is easy to install and move as needed, fitting seamlessly into various spaces. Color: Black. Material: Plastic.