The Ruck Air Movement 8-In. Prime EVO 859 CFM Mixed Flow Inline Duct Fan is engineered for optimal airflow in 8-inch ducts, featuring advanced computer-optimized impeller blades and guide vanes. Its robust single-phase AC motor operates quietly and efficiently, allowing for three adjustable speeds with a stepless switch. Constructed from corrosion-resistant material, this fan is durable and includes a convenient mounting bracket for easy installation.