Enhance your home or workspace ventilation with the 4 in. Inline Booster Duct Fan. This powerful fan operates at 4500 RPM, delivering an impressive airflow of 130 CFM while consuming only 6-Watt of power. Its upgraded DC motor ensures quiet operation, making it perfect for spaces like grow rooms, bathrooms, kitchens, workshops, basements, and attics. The fan's high-quality plastic construction allows for quick removal and easy maintenance, ensuring long-lasting performance. Included is a variable speed controller, giving you the flexibility to adjust airflow and noise levels to suit your needs. With a duct size of 4 in. dimensions of 7.28 in. x 3.82 in. x 3.82 in. and a noise level of just 26 dBA, this duct fan is designed for efficiency and comfort. Its compact and lightweight design makes it easy to install and ideal for various ventilation applications. Upgrade your HVAC system with this reliable and efficient inline booster duct fan today. Color: Black.